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Takayuki Takasugi - One of the best experts on this subject based on the ideXlab platform.

  • The effect of Nb addition on environmental Embrittlement of a Ni3(Si,Ti) alloy
    Intermetallics, 2020
    Co-Authors: Takayuki Takasugi, Shuji Hanada
    Abstract:

    Abstract The effect of Nb addition on the moisture-Induced Embrittlement of a Ni 3 (Si,Ti) alloy was investigated at room temperature by tensile test and SEM fractography. Embrittlement/ductility was assessed as functions of strain rate and environment. The Nb-containing second-phase dispersion was found to be effective in reducing the moisture-Induced Embrittlement of the Ni 3 (Si,Ti) alloy, while Nb as a solute in the Ll 2 matrix was shown to enhance the moisture-Induced Embrittlement of the Ni 3 (Si,Ti) alloy. Possible mechanisms accounting for the beneficial effect of the Nb-containing second-phase dispersion on the moisture Induced Embrittlement of the Ni 3 (Si,Ti) alloy was discussed in terms of microstructural modification by the second-phase, hydrogen transportation kinetics and deformation properties in the constituent phases or L1 2 matrix/second-phase interface.

  • Microstructural Effect on Environmental Embrittlement of Isothermally Forged TiAl-Based Intermetallic Alloys
    MRS Proceedings, 2020
    Co-Authors: Takayuki Takasugi, T. Tsuyumu, Yasuyuki Kaneno, Hirofumi Inoue
    Abstract:

    ABSTRACTThe TiAl-based (Ti-46Al-7Nb-1.5Cr (at%)) intermetallic alloy was tensile tested in vacuum and air as a function of temperature to investigate microstructural effect on the moisture-Induced Embrittlement. The reduction in tensile strength (or elongation) due to testing in air diminishes as testing temperature increases. From the fracture strength (or elongation)-temperature curves, it was found that the near gamma grain microstructure was most resistant, and the dual-phase microstructure most susceptible to moisture-Induced Embrittlement. Also, the moisture-Induced Embrittlement of the TiAl-based intermetallic alloy with fully lamellar microstructure depends on the lamellar spacing, and reduced with decreasing lamellar spacing.

  • effect of precipitated co solid solution on moisture Induced Embrittlement of l12 type co3ti ordered alloys
    Acta Materialia, 2003
    Co-Authors: Yasuyuki Kaneno, Hisahiro Inoue, T Nakamura, Takayuki Takasugi
    Abstract:

    Abstract The moisture-Induced Embrittlement of the L1 2 -type Co 3 Ti alloys (with nominal compositions of Co-19, 20 and 20.5 at.% Ti) was studied by tensile test, fractographic and microstructural observation. All the alloys exhibited age hardening at the examined temperatures due to precipitation of fcc Co solid solution in the L1 2 matrix. For the Co-19Ti alloy which contained primary Co solid solution particles, moisture-Induced Embrittlement did not occur in the solution treated condition but was caused by aging, and then reduced by prolonged aging. For the Co-20Ti and Co-20.5Ti alloys which contained no primary Co solid solution particles, moisture-Induced Embrittlement occurred in the solution treated condition and was increased by aging but significantly reduced by prolonged aging, similar to the Co-19Ti alloy. These results were discussed in association with the interaction of hydrogen with the Co solid solution particle because this interaction was greatly dependent on the morphology, size and interfacial structure of the second phase particles.

  • Effect of Microstructure on Moisture-Induced Embrittlement of L12 Intermetallic Compounds
    Isij International, 2003
    Co-Authors: Takayuki Takasugi
    Abstract:

    The effects of grain size and second phase on moisture-Induced Embrittlement of L1 2 -type Co 3 Ti and Ni 3 (Si, Ti) alloys were investigated by tensile test in air and vacuum as functions of strain rate and temperature, in combination with microstructural and fractographic observation. In both the intermetallic alloys, brittle-ductile transition (BDT) strain rate defined from an elongation vs. strain rate curve decreased with decreasing grain size, meaning that fine-grained microstructure has the effect of reducing the moisture-Induced Embrittlement. Also, it was found that dispersion of Co solid solution phase and Nb-containing second phase has the effect of reducing moisture-Induced Embrittlement of the Co 3 Ti and the Ni 3 (Si, Ti)-Nb alloys, respectively, when their second phases are incoherent with the L1 2 matrix. Contrarily, finely precipitated Co solid solution phase that is coherent with the L1 2 matrix has the effect of enhancing moisture-Induced Embrittlement of the Co 3 Ti alloys. Mechanisms responsible for the microstructural effect on the moisture-Induced Embrittlement of the L12 intermetallic alloys were presented and discussed.

  • Microstructural effects on moisture-Induced Embrittlement of isothermally forged TiAl-based intermetallic alloys
    Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science, 2003
    Co-Authors: T. Tsuyumu, Yasuyuki Kaneno, Hirofumi Inoue, Takayuki Takasugi
    Abstract:

    By using isothermally forged TiAl-based intermetallic alloys, various microstructures (of γ-grain, duplex, dual-phase, and fully lamellar microstructures) were prepared. These TiAl-based intermetallic alloys were tensile tested in vacuum and air as functions of strain rate and temperature to investigate microstructural effects on the moisture-Induced Embrittlement. All the intermetallic alloys with different microstructures showed different levels of reduced tensile stress (or elongation) in air at room temperature. The reduction in tensile stress (or elongation) due to testing in air diminishes as the testing temperature (or strain-rate) increases. From the fracture stress-temperature curves, it was found that the γ-grain microstructure was the most resistant to the moisture-Induced Embrittlement, and the dual-phase microstructure was the most susceptible to the moisture-Induced Embrittlement. Also, the moisture-Induced Embrittlement of the TiAl-based intermetallic alloys with a fully lamellar microstructure depends on the lamellar spacing and is reduced with decreasing lamellar spacing. The possible reasons for the observed microstructural effect on the moisture-Induced Embrittlement were discussed, in association with hydrogen behavior and properties in the constituent phases and at some interfaces.

Jacques Verdu - One of the best experts on this subject based on the ideXlab platform.

  • Review: degradation-Induced Embrittlement in semi-crystalline polymers having their amorphous phase in rubbery state
    Journal of Materials Science, 2008
    Co-Authors: Bruno Fayolle, Xavier Colin, Emmanuel Richaud, Jacques Verdu
    Abstract:

    The literature dealing with degradation-Induced Embrittlement mechanisms in semi-crystalline polymers having their amorphous phase in rubbery state is reviewed. It is first demonstrated that the decrease of molar mass resulting from a quasi-homogeneous chain scission process is responsible for Embrittlement. The main specificity of the polymer family under study is that Embrittlement occurs at a very low conversion of the degradation process, while the entanglement network in the amorphous phase is slightly damaged. In these polymers, chain scission induces chemicrystallization. The analyses of available data on this process show that it is characterized by a relatively high yield: about one half entanglement strands integrate the crystalline phase after one chain scission. A simple relationship expressing the chemicrystallization yield for a given polymer structure is proposed. Chain scission and chemicrystallization can lead to Embrittlement through two possible causal chains: (1) chain scission → molar mass decrease → chemicrystallization → decrease of the interlamellar spacing → Embrittlement. (2) Chain scission → molar mass decrease → chemicrystallization → decrease of the tie-macromolecule concentration → Embrittlement. At this state of our knowledge, both causal chains are almost undistinguishable.

  • mechanism of degradation Induced Embrittlement in polyethylene
    Polymer Degradation and Stability, 2007
    Co-Authors: Bruno Fayolle, Lida Audouin, Xavier Colin, Jacques Verdu
    Abstract:

    Abstract The thermal oxidation of polyethylene films in air at 80 °C and 90 °C has been studied by tensile testing, IR spectrophotometry and molar mass determination from rheometric measurements. In the conditions under study, the polymer predominantly undergoes chain scission and embrittles suddenly when the weight average molar mass reaches a critical value (90 kg mol −1 ), far before significant damage of the entanglement network ( M e  = 1.9 kg mol −1 ) in the amorphous phase. The following Embrittlement mechanism is proposed: chain scission in the amorphous phase induces chemicrystallization. The thickness of the interlamellar amorphous layer ( l a ) decreases until a critical value of the order of 6–7 nm, below which plasticity cannot be activated and the polymer behaves in a brittle manner, as previously shown for virgin polyethylene. Using ( l a , M W ) maps, it is possible to explain the differences observed in the Embrittlement behaviour of semi-crystalline polymers predominantly undergoing chain scission.

  • Mechanism of degradation Induced Embrittlement in polyethylene
    Polymer Degradation and Stability, 2007
    Co-Authors: Bruno Fayolle, Lida Audouin, Xavier Colin, Jacques Verdu
    Abstract:

    The thermal oxidation of polyethylene films in air at 80 °C and 90 °C has been studied by tensile testing, IR spectrophotometry and molar mass determination from rheometric measurements. In the conditions under study, the polymer predominantly undergoes chain scission and embrittles suddenly when the weight average molar mass reaches a critical value (90 kg mol-1), far before significant damage of the entanglement network (Me= 1.9 kg mol-1) in the amorphous phase. The following Embrittlement mechanism is proposed: chain scission in the amorphous phase induces chemicrystallization. The thickness of the interlamellar amorphous layer (la) decreases until a critical value of the order of 6-7 nm, below which plasticity cannot be activated and the polymer behaves in a brittle manner, as previously shown for virgin polyethylene. Using (la, MW) maps, it is possible to explain the differences observed in the Embrittlement behaviour of semi-crystalline polymers predominantly undergoing chain scission. © 2006 Elsevier Ltd. All rights reserved.

  • radiation Induced Embrittlement of ptfe
    Polymer, 2003
    Co-Authors: Bruno Fayolle, Lida Audouin, Jacques Verdu
    Abstract:

    Abstract The radiochemical degradation of polytetrafluoroethylene (PTFE) samples has been studied in air at dose rate 100 Gy/h for doses up to 5000 Gy, at ambient temperature. The polymer degradation has been monitored by DSC, tensile testing and Essential Work of Fracture (EWF) testing. Some fractured samples have been observed by scanning electron microscopy. The polymer undergoes a fast chain scission, its number average molar mass is divided by about 20 for a dose of 1000 Gy and tends towards a pseudo asymptotic value of ∼20 kg mol −1 (against 6200 kg mol −1 initial value). The modulus and yield characteristics seem to be almost unaffected whereas ultimate properties undergo strong variations. The ultimate elongation e R and the EWF plastic work characteristic βw p first increase and then decrease. The ultimate stress decreases and tends towards a pseudo asymptotic value. The mechanisms of radiation Induced ultimate property changes are discussed. The first stage could be due to the destruction of non-extended tie molecules (due to the presence of very long chains) responsible for interfibrillar bridging during fracture. The (more classical) second stage is a progressive Embrittlement due to the destruction of the entanglement network. The critical molar mass M ′ c for Embrittlement is such as M ′ c ∼50 M e , M e being the molar mass between entanglements in the melt. This relationship could be a general characteristic of high crystallinity non-polar polymers.

  • Radiation Induced Embrittlement of PTFE
    Polymer, 2003
    Co-Authors: Bruno Fayolle, Lida Audouin, Jacques Verdu
    Abstract:

    The radiochemical degradation of polytetrafluoroethylene (PTFE) samples has been studied in air at dose rate 100 Gy/h for doses up to 5000 Gy, at ambient temperature. The polymer degradation has been monitored by DSC, tensile testing and Essential Work of Fracture (EWF) testing. Some fractured samples have been observed by scanning electron microscopy. The polymer undergoes a fast chain scission, its number average molar mass is divided by about 20 for a dose of 1000 Gy and tends towards a pseudo asymptotic value of ∼20 kg mol-1(against 6200 kg mol-1initial value). The modulus and yield characteristics seem to be almost unaffected whereas ultimate properties undergo strong variations. The ultimate elongation εRand the EWF plastic work characteristic βwpfirst increase and then decrease. The ultimate stress decreases and tends towards a pseudo asymptotic value. The mechanisms of radiation Induced ultimate property changes are discussed. The first stage could be due to the destruction of non-extended tie molecules (due to the presence of very long chains) responsible for interfibrillar bridging during fracture. The (more classical) second stage is a progressive Embrittlement due to the destruction of the entanglement network. The critical molar mass M′cfor Embrittlement is such as M′c∼ 50Me, Mebeing the molar mass between entanglements in the melt. This relationship could be a general characteristic of high crystallinity non-polar polymers. © 2003 Elsevier Science Ltd. All rights reserved.

Martalena Antti - One of the best experts on this subject based on the ideXlab platform.

  • The effect of crystallographic orientation on solid metal Induced Embrittlement of Ti-8Al-1Mo-1V in contact with copper
    IOP Conference Series: Materials Science and Engineering, 2013
    Co-Authors: Pia Akerfeldt, Robert Pederson, Martalena Antti, Uta Klement
    Abstract:

    Solid metal Induced Embrittlement (SMIE) occurs when a metal experiences tensile stress and is in contact with another metal with lower melting temperature. SMIE is believed to be a combined action of surface self-diffusion of the embrittling species to the crack tip and adsorption of the embrittling species at the crack tip, which weakens the crack tip region. In the present study, both SMIE of the near alpha alloy Ti-8Al-1Mo-1V in contact with copper and its influence by crystallographic orientation have been studied. U-bend specimens coated with copper were heat treated at 480°C for 8 hours. One of the cracks was examined in detail using electron backscatter diffraction technique. A preferable crack path was found along high angle grain boundaries with grains oriented close to [0001] in the crack direction; this indicates that there is a connection between the SMIE crack characteristics and the crystallographic orientation.

  • Investigation of the influence of copper welding electrodes on Ti-8Al-1Mo-1V and Ti-6Al-2Sn-4Zr-2Mo with respect to solid metal Induced Embrittlement
    IOP Conference Series: Materials Science and Engineering, 2012
    Co-Authors: Pia Akerfeldt, Robert Pederson, Martalena Antti
    Abstract:

    Solid Metal Induced Embrittlement (SMIE) is caused by a specific combination of two solid metals in intimate contact. Cadmium, gold, silver and copper are known to cause SMIE in certain titanium alloys. Solid copper is used in welding electrodes and fixtures in various manufacturing processes for titanium parts within the aerospace industry. In the case of resistance welding, titanium alloys are in intimate contact with solid copper, since the electrodes resistively heat the titanium part under pressure during the welding process. No previous published work that investigates the risk of using copper electrodes for welding of titanium alloys is available in the literature, but an initial study using U-bend testing indicates that solid copper in contact with Ti-8Al-1V-1Mo and Ti-6Al-2Sn-4Zr-2Mo could lead to SMIE. Therefore, in the present study, resistance welded Ti-8Al-1V-1Mo and Ti-6Al-2Sn-4Zr-2Mo have been evaluated to investigate the influence of copper electrodes on these alloys. Furthermore, resistance welded specimens sputtered with copper and gold to promote SMIE have also been evaluated. No SMIE was found in the resistance welded specimens, which may be explained by the short interaction time that the copper electrodes are in intimate contact with the titanium alloy, and/or the magnitude of residual stresses after welding, which may be too low to initiate SMIE.

  • solid metal Induced Embrittlement of titanium alloys in contact with copper
    World Conference on Titanium : 19 06 2011 - 24 06 2011, 2011
    Co-Authors: Pia Akerfeldt, Robert Pederson, Martalena Antti
    Abstract:

    Solid Metal Induced Embrittlement (SMIE) is caused by a specific combination of a susceptible alloy, tensile stress and a solid metal. Solid copper is commonly used in various manufacturing process ...

Bruno Fayolle - One of the best experts on this subject based on the ideXlab platform.

  • Review: degradation-Induced Embrittlement in semi-crystalline polymers having their amorphous phase in rubbery state
    Journal of Materials Science, 2008
    Co-Authors: Bruno Fayolle, Xavier Colin, Emmanuel Richaud, Jacques Verdu
    Abstract:

    The literature dealing with degradation-Induced Embrittlement mechanisms in semi-crystalline polymers having their amorphous phase in rubbery state is reviewed. It is first demonstrated that the decrease of molar mass resulting from a quasi-homogeneous chain scission process is responsible for Embrittlement. The main specificity of the polymer family under study is that Embrittlement occurs at a very low conversion of the degradation process, while the entanglement network in the amorphous phase is slightly damaged. In these polymers, chain scission induces chemicrystallization. The analyses of available data on this process show that it is characterized by a relatively high yield: about one half entanglement strands integrate the crystalline phase after one chain scission. A simple relationship expressing the chemicrystallization yield for a given polymer structure is proposed. Chain scission and chemicrystallization can lead to Embrittlement through two possible causal chains: (1) chain scission → molar mass decrease → chemicrystallization → decrease of the interlamellar spacing → Embrittlement. (2) Chain scission → molar mass decrease → chemicrystallization → decrease of the tie-macromolecule concentration → Embrittlement. At this state of our knowledge, both causal chains are almost undistinguishable.

  • mechanism of degradation Induced Embrittlement in polyethylene
    Polymer Degradation and Stability, 2007
    Co-Authors: Bruno Fayolle, Lida Audouin, Xavier Colin, Jacques Verdu
    Abstract:

    Abstract The thermal oxidation of polyethylene films in air at 80 °C and 90 °C has been studied by tensile testing, IR spectrophotometry and molar mass determination from rheometric measurements. In the conditions under study, the polymer predominantly undergoes chain scission and embrittles suddenly when the weight average molar mass reaches a critical value (90 kg mol −1 ), far before significant damage of the entanglement network ( M e  = 1.9 kg mol −1 ) in the amorphous phase. The following Embrittlement mechanism is proposed: chain scission in the amorphous phase induces chemicrystallization. The thickness of the interlamellar amorphous layer ( l a ) decreases until a critical value of the order of 6–7 nm, below which plasticity cannot be activated and the polymer behaves in a brittle manner, as previously shown for virgin polyethylene. Using ( l a , M W ) maps, it is possible to explain the differences observed in the Embrittlement behaviour of semi-crystalline polymers predominantly undergoing chain scission.

  • Mechanism of degradation Induced Embrittlement in polyethylene
    Polymer Degradation and Stability, 2007
    Co-Authors: Bruno Fayolle, Lida Audouin, Xavier Colin, Jacques Verdu
    Abstract:

    The thermal oxidation of polyethylene films in air at 80 °C and 90 °C has been studied by tensile testing, IR spectrophotometry and molar mass determination from rheometric measurements. In the conditions under study, the polymer predominantly undergoes chain scission and embrittles suddenly when the weight average molar mass reaches a critical value (90 kg mol-1), far before significant damage of the entanglement network (Me= 1.9 kg mol-1) in the amorphous phase. The following Embrittlement mechanism is proposed: chain scission in the amorphous phase induces chemicrystallization. The thickness of the interlamellar amorphous layer (la) decreases until a critical value of the order of 6-7 nm, below which plasticity cannot be activated and the polymer behaves in a brittle manner, as previously shown for virgin polyethylene. Using (la, MW) maps, it is possible to explain the differences observed in the Embrittlement behaviour of semi-crystalline polymers predominantly undergoing chain scission. © 2006 Elsevier Ltd. All rights reserved.

  • radiation Induced Embrittlement of ptfe
    Polymer, 2003
    Co-Authors: Bruno Fayolle, Lida Audouin, Jacques Verdu
    Abstract:

    Abstract The radiochemical degradation of polytetrafluoroethylene (PTFE) samples has been studied in air at dose rate 100 Gy/h for doses up to 5000 Gy, at ambient temperature. The polymer degradation has been monitored by DSC, tensile testing and Essential Work of Fracture (EWF) testing. Some fractured samples have been observed by scanning electron microscopy. The polymer undergoes a fast chain scission, its number average molar mass is divided by about 20 for a dose of 1000 Gy and tends towards a pseudo asymptotic value of ∼20 kg mol −1 (against 6200 kg mol −1 initial value). The modulus and yield characteristics seem to be almost unaffected whereas ultimate properties undergo strong variations. The ultimate elongation e R and the EWF plastic work characteristic βw p first increase and then decrease. The ultimate stress decreases and tends towards a pseudo asymptotic value. The mechanisms of radiation Induced ultimate property changes are discussed. The first stage could be due to the destruction of non-extended tie molecules (due to the presence of very long chains) responsible for interfibrillar bridging during fracture. The (more classical) second stage is a progressive Embrittlement due to the destruction of the entanglement network. The critical molar mass M ′ c for Embrittlement is such as M ′ c ∼50 M e , M e being the molar mass between entanglements in the melt. This relationship could be a general characteristic of high crystallinity non-polar polymers.

  • Radiation Induced Embrittlement of PTFE
    Polymer, 2003
    Co-Authors: Bruno Fayolle, Lida Audouin, Jacques Verdu
    Abstract:

    The radiochemical degradation of polytetrafluoroethylene (PTFE) samples has been studied in air at dose rate 100 Gy/h for doses up to 5000 Gy, at ambient temperature. The polymer degradation has been monitored by DSC, tensile testing and Essential Work of Fracture (EWF) testing. Some fractured samples have been observed by scanning electron microscopy. The polymer undergoes a fast chain scission, its number average molar mass is divided by about 20 for a dose of 1000 Gy and tends towards a pseudo asymptotic value of ∼20 kg mol-1(against 6200 kg mol-1initial value). The modulus and yield characteristics seem to be almost unaffected whereas ultimate properties undergo strong variations. The ultimate elongation εRand the EWF plastic work characteristic βwpfirst increase and then decrease. The ultimate stress decreases and tends towards a pseudo asymptotic value. The mechanisms of radiation Induced ultimate property changes are discussed. The first stage could be due to the destruction of non-extended tie molecules (due to the presence of very long chains) responsible for interfibrillar bridging during fracture. The (more classical) second stage is a progressive Embrittlement due to the destruction of the entanglement network. The critical molar mass M′cfor Embrittlement is such as M′c∼ 50Me, Mebeing the molar mass between entanglements in the melt. This relationship could be a general characteristic of high crystallinity non-polar polymers. © 2003 Elsevier Science Ltd. All rights reserved.

Pia Akerfeldt - One of the best experts on this subject based on the ideXlab platform.

  • Solid metal Induced Embrittlement of titanium alloys
    2020
    Co-Authors: Pia Akerfeldt
    Abstract:

    Titanium alloys were for a time believed to be highly resistant to environmentally assisted cracking because of their ability to form a protective oxide film on the surface. Their resistance can st ...

  • The effect of crystallographic orientation on solid metal Induced Embrittlement of Ti-8Al-1Mo-1V in contact with copper
    IOP Conference Series: Materials Science and Engineering, 2013
    Co-Authors: Pia Akerfeldt, Robert Pederson, Martalena Antti, Uta Klement
    Abstract:

    Solid metal Induced Embrittlement (SMIE) occurs when a metal experiences tensile stress and is in contact with another metal with lower melting temperature. SMIE is believed to be a combined action of surface self-diffusion of the embrittling species to the crack tip and adsorption of the embrittling species at the crack tip, which weakens the crack tip region. In the present study, both SMIE of the near alpha alloy Ti-8Al-1Mo-1V in contact with copper and its influence by crystallographic orientation have been studied. U-bend specimens coated with copper were heat treated at 480°C for 8 hours. One of the cracks was examined in detail using electron backscatter diffraction technique. A preferable crack path was found along high angle grain boundaries with grains oriented close to [0001] in the crack direction; this indicates that there is a connection between the SMIE crack characteristics and the crystallographic orientation.

  • Investigation of the influence of copper welding electrodes on Ti-8Al-1Mo-1V and Ti-6Al-2Sn-4Zr-2Mo with respect to solid metal Induced Embrittlement
    IOP Conference Series: Materials Science and Engineering, 2012
    Co-Authors: Pia Akerfeldt, Robert Pederson, Martalena Antti
    Abstract:

    Solid Metal Induced Embrittlement (SMIE) is caused by a specific combination of two solid metals in intimate contact. Cadmium, gold, silver and copper are known to cause SMIE in certain titanium alloys. Solid copper is used in welding electrodes and fixtures in various manufacturing processes for titanium parts within the aerospace industry. In the case of resistance welding, titanium alloys are in intimate contact with solid copper, since the electrodes resistively heat the titanium part under pressure during the welding process. No previous published work that investigates the risk of using copper electrodes for welding of titanium alloys is available in the literature, but an initial study using U-bend testing indicates that solid copper in contact with Ti-8Al-1V-1Mo and Ti-6Al-2Sn-4Zr-2Mo could lead to SMIE. Therefore, in the present study, resistance welded Ti-8Al-1V-1Mo and Ti-6Al-2Sn-4Zr-2Mo have been evaluated to investigate the influence of copper electrodes on these alloys. Furthermore, resistance welded specimens sputtered with copper and gold to promote SMIE have also been evaluated. No SMIE was found in the resistance welded specimens, which may be explained by the short interaction time that the copper electrodes are in intimate contact with the titanium alloy, and/or the magnitude of residual stresses after welding, which may be too low to initiate SMIE.

  • solid metal Induced Embrittlement of titanium alloys in contact with copper
    World Conference on Titanium : 19 06 2011 - 24 06 2011, 2011
    Co-Authors: Pia Akerfeldt, Robert Pederson, Martalena Antti
    Abstract:

    Solid Metal Induced Embrittlement (SMIE) is caused by a specific combination of a susceptible alloy, tensile stress and a solid metal. Solid copper is commonly used in various manufacturing process ...