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Nachum Frage – One of the best experts on this subject based on the ideXlab platform.

  • Ultrasonic additive manufacturing of Steel: Method, post-processing treatments and properties
    Journal of Materials Processing Technology, 2018
    Co-Authors: Asaf Levy, Aslan Miriyev, Niyanth Sridharan, Tianyang Han, Eran Tuval, Sudarsanam Suresh Babu, Marcelo Jorge Dapino, Nachum Frage
    Abstract:

    Ultrasonic additive manufacturing (UAM) was applied to fabricate laminated Carbon Steel structures. The feasibility of UAM to manufacture low-Alloy Carbon Steel samples was proven. Interface investigation of the UAM parts was conducted by SEM, EBSD and TEM analysis. Multiple defects at the interfaces of the as-printed parts were observed. In order to improve the structural homogeneity and mechanical properties of the parts, spark plasma sintsintering (SPS) and hot isosisostatic pressing (HIP) post-treatments were applied. As a result, after both treatments, interface defects were healed and the shear strength of the welding interfaces was significantly improved. Treatment by SPS apparatus showed higher shear strength improvements as compared to the HIP-treated specimens.

  • thermal stability and growth kinetics of the interfacial tic layer in the ti Alloy Carbon Steel system
    Acta Materialia, 2014
    Co-Authors: Aslan Miriyev, Michael Sinder, Nachum Frage
    Abstract:

    Abstract The thermal stability and growth kinetics of the titanium carbide interfacial layer, formed in the course of the diffusion bonding of low-Alloy Carbon Steel (0.3 wt.% C) and Ti Alloy, were investigated. Thermal stability of the titanium carbide interfacial layer was evaluated based on the thermodynamic analysis of the Fe–Ti–C ternary system. Thermodynamic analysis of the Fe–Ti–C system confirmed that the titanium carbide layer is stable in contact with the Steel part of the diffusion couple. An experiment with inert markers at the interface confirms that growth kinetics of the TiC layer is governed by Carbon diffusion from Steel to titanium Alloy through the titanium carbide phase. In the 800–950 °C temperature range, Carbon diffusion in austenite was found to be a rate-determining step of the titanium carbide layer growth during the initial stage of the interaction (

  • Thermal stability and growth kinetics of the interfacial TiC layer in the Ti Alloy/Carbon Steel system
    Acta Materialia, 2014
    Co-Authors: Aslan Miriyev, Michael Sinder, Nachum Frage
    Abstract:

    Abstract The thermal stability and growth kinetics of the titanium carbide interfacial layer, formed in the course of the diffusion bonding of low-Alloy Carbon Steel (0.3 wt.% C) and Ti Alloy, were investigated. Thermal stability of the titanium carbide interfacial layer was evaluated based on the thermodynamic analysis of the Fe–Ti–C ternary system. Thermodynamic analysis of the Fe–Ti–C system confirmed that the titanium carbide layer is stable in contact with the Steel part of the diffusion couple. An experiment with inert markers at the interface confirms that growth kinetics of the TiC layer is governed by Carbon diffusion from Steel to titanium Alloy through the titanium carbide phase. In the 800–950 °C temperature range, Carbon diffusion in austenite was found to be a rate-determining step of the titanium carbide layer growth during the initial stage of the interaction (

Aslan Miriyev – One of the best experts on this subject based on the ideXlab platform.

  • Ultrasonic additive manufacturing of Steel: Method, post-processing treatments and properties
    Journal of Materials Processing Technology, 2018
    Co-Authors: Asaf Levy, Aslan Miriyev, Niyanth Sridharan, Tianyang Han, Eran Tuval, Sudarsanam Suresh Babu, Marcelo Jorge Dapino, Nachum Frage
    Abstract:

    Ultrasonic additive manufacturing (UAM) was applied to fabricate laminated Carbon Steel structures. The feasibility of UAM to manufacture low-Alloy Carbon Steel samples was proven. Interface investigation of the UAM parts was conducted by SEM, EBSD and TEM analysis. Multiple defects at the interfaces of the as-printed parts were observed. In order to improve the structural homogeneity and mechanical properties of the parts, spark plasma sintering (SPS) and hot isostatic pressing (HIP) post-treatments were applied. As a result, after both treatments, interface defects were healed and the shear strength of the welding interfaces was significantly improved. Treatment by SPS apparatus showed higher shear strength improvements as compared to the HIP-treated specimens.

  • thermal stability and growth kinetics of the interfacial tic layer in the ti Alloy Carbon Steel system
    Acta Materialia, 2014
    Co-Authors: Aslan Miriyev, Michael Sinder, Nachum Frage
    Abstract:

    Abstract The thermal stability and growth kinetics of the titanium carbide interfacial layer, formed in the course of the diffusion bonding of low-Alloy Carbon Steel (0.3 wt.% C) and Ti Alloy, were investigated. Thermal stability of the titanium carbide interfacial layer was evaluated based on the thermodynamic analysis of the Fe–Ti–C ternary system. Thermodynamic analysis of the Fe–Ti–C system confirmed that the titanium carbide layer is stable in contact with the Steel part of the diffusion couple. An experiment with inert markers at the interface confirms that growth kinetics of the TiC layer is governed by Carbon diffusion from Steel to titanium Alloy through the titanium carbide phase. In the 800–950 °C temperature range, Carbon diffusion in austenite was found to be a rate-determining step of the titanium carbide layer growth during the initial stage of the interaction (

  • Thermal stability and growth kinetics of the interfacial TiC layer in the Ti Alloy/Carbon Steel system
    Acta Materialia, 2014
    Co-Authors: Aslan Miriyev, Michael Sinder, Nachum Frage
    Abstract:

    Abstract The thermal stability and growth kinetics of the titanium carbide interfacial layer, formed in the course of the diffusion bonding of low-Alloy Carbon Steel (0.3 wt.% C) and Ti Alloy, were investigated. Thermal stability of the titanium carbide interfacial layer was evaluated based on the thermodynamic analysis of the Fe–Ti–C ternary system. Thermodynamic analysis of the Fe–Ti–C system confirmed that the titanium carbide layer is stable in contact with the Steel part of the diffusion couple. An experiment with inert markers at the interface confirms that growth kinetics of the TiC layer is governed by Carbon diffusion from Steel to titanium Alloy through the titanium carbide phase. In the 800–950 °C temperature range, Carbon diffusion in austenite was found to be a rate-determining step of the titanium carbide layer growth during the initial stage of the interaction (

Michael Sinder – One of the best experts on this subject based on the ideXlab platform.

  • thermal stability and growth kinetics of the interfacial tic layer in the ti Alloy Carbon Steel system
    Acta Materialia, 2014
    Co-Authors: Aslan Miriyev, Michael Sinder, Nachum Frage
    Abstract:

    Abstract The thermal stability and growth kinetics of the titanium carbide interfacial layer, formed in the course of the diffusion bonding of low-Alloy Carbon Steel (0.3 wt.% C) and Ti Alloy, were investigated. Thermal stability of the titanium carbide interfacial layer was evaluated based on the thermodynamic analysis of the Fe–Ti–C ternary system. Thermodynamic analysis of the Fe–Ti–C system confirmed that the titanium carbide layer is stable in contact with the Steel part of the diffusion couple. An experiment with inert markers at the interface confirms that growth kinetics of the TiC layer is governed by Carbon diffusion from Steel to titanium Alloy through the titanium carbide phase. In the 800–950 °C temperature range, Carbon diffusion in austenite was found to be a rate-determining step of the titanium carbide layer growth during the initial stage of the interaction (

  • Thermal stability and growth kinetics of the interfacial TiC layer in the Ti Alloy/Carbon Steel system
    Acta Materialia, 2014
    Co-Authors: Aslan Miriyev, Michael Sinder, Nachum Frage
    Abstract:

    Abstract The thermal stability and growth kinetics of the titanium carbide interfacial layer, formed in the course of the diffusion bonding of low-Alloy Carbon Steel (0.3 wt.% C) and Ti Alloy, were investigated. Thermal stability of the titanium carbide interfacial layer was evaluated based on the thermodynamic analysis of the Fe–Ti–C ternary system. Thermodynamic analysis of the Fe–Ti–C system confirmed that the titanium carbide layer is stable in contact with the Steel part of the diffusion couple. An experiment with inert markers at the interface confirms that growth kinetics of the TiC layer is governed by Carbon diffusion from Steel to titanium Alloy through the titanium carbide phase. In the 800–950 °C temperature range, Carbon diffusion in austenite was found to be a rate-determining step of the titanium carbide layer growth during the initial stage of the interaction (

Martin F.-x. Wagner – One of the best experts on this subject based on the ideXlab platform.

  • Strain-rate sensitive ductility in a low-Alloy Carbon Steel after quenching and partitioning treatment
    Scientific reports, 2019
    Co-Authors: Philipp Frint, Till Kaiser, Thomas Mehner, Enrico Bruder, Mario Scholze, Bohuslav Mašek, Thomas Lampke, Martin F.-x. Wagner
    Abstract:

    We investigate an extraordinarily high ductility in a low Alloy Carbon Steel at an elevated temperature after a quenching and partitioning (Q&P) treatment. The conventional (quenched and tempered) reference material does not show similar behavior. Interestingly, the Q&P treated material’s ductility is considerably reduced at increasing strain rates while strength remains almost constant. These results indicate the presence of a diffusion-controlled deformation mechanism at elevated temperatures. Our research shows that interlath retained austaustenite is more stable during deformation at higher temperatures, resulting in a delayed transformation to martensite and therefore to a more pronounced contribution to plastic deformation at (and in the vicinity of) the many interfaces inherently present in this multi-phase Steel.

Philipp Frint – One of the best experts on this subject based on the ideXlab platform.

  • Strain-rate sensitive ductility in a low-Alloy Carbon Steel after quenching and partitioning treatment
    Scientific reports, 2019
    Co-Authors: Philipp Frint, Till Kaiser, Thomas Mehner, Enrico Bruder, Mario Scholze, Bohuslav Mašek, Thomas Lampke, Martin F.-x. Wagner
    Abstract:

    We investigate an extraordinarily high ductility in a low Alloy Carbon Steel at an elevated temperature after a quenching and partitioning (Q&P) treatment. The conventional (quenched and tempered) reference material does not show similar behavior. Interestingly, the Q&P treated material’s ductility is considerably reduced at increasing strain rates while strength remains almost constant. These results indicate the presence of a diffusion-controlled deformation mechanism at elevated temperatures. Our research shows that interlath retained austenite is more stable during deformation at higher temperatures, resulting in a delayed transformation to martensite and therefore to a more pronounced contribution to plastic deformation at (and in the vicinity of) the many interfaces inherently present in this multi-phase Steel.