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V. A. Valitov - One of the best experts on this subject based on the ideXlab platform.
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Effect of the Temperature of Pressure Welding of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy on the Structure and Properties of the Welded Joints
Russian Metallurgy (Metally), 2020Co-Authors: A. A. Drozdov, E. V. Galieva, V. A. Valitov, K. B. Povarova, O. A. Bazyleva, E. G. Arginbaeva, M. A. Bulakhtina, A. N. RaevskikhAbstract:This work is a continuation of the studies of the possibility of formation of a one-piece blisk unit for gas turbine engines by solid-phase Pressure Welding (PW) of a single-crystal [001] Ni_3Al-based VKNA-type blade alloy with a wrought EP975 disk nickel superalloy. The influence of the PW temperature at a strain of 10 and 24% on the structure and mechanical properties of welded specimens at room temperature is investigated. An increase in the process temperature by 50°C to 1175°C is shown not to change the structure of the VKNA-25 alloy, and the γ-phase grain sizes in the EP975 alloy increase from 7–8 to 15–18 μm. During tensile tests, the welded specimens fail through the VKNA-25 alloy, and the strength of the welded specimens fabricated at 1175°C is almost twice as high as that of the specimens fabricated by PW at 1125°C at the same strain of the EP975 alloy. Electron backscatter diffraction (EBSD) analysis of the solid-phase bonding zone demonstrates that the VKNA-25 alloy retains its single-crystal structure.
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Effect of the Deformation during Pressure Welding of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy on the Structure and Properties of the Welded Joints
Russian Metallurgy (Metally), 2019Co-Authors: A. A. Drozdov, E. V. Galieva, V. A. Valitov, K. B. Povarova, O. A. Bazyleva, M. A. Bulakhtina, E. G. ArginbaevaAbstract:The influence of the strain (24, 30, 40%) during the Pressure Welding (PW) of an EP975 alloy in a superplasticity state and subsequent high-temperature heat treatment of welded joints on their structure and room-temperature mechanical properties is studied to find the conditions of PW of a single-crystal [001] Ni_3Al-based VKNA-25 blade alloy and an EP975 disk alloy in order to fabricate a blisk. The tensile strength of the welded samples is found to be maximal after PW of the EP975 alloy at a strain of ~40%, and the strength reached at lower strains is also sufficiently high, 0.7–0.8 of the strength of the VKNA-25 blade alloy. To optimize the technology of solid-phase joining, it is reasonable to decrease the PW strain to 20% and to increase the Welding temperature to 1175°C.
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Structure and Properties of the Solid-Phase Joints of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy Formed by Pressure Welding at a Strain of 24% under the Superplasticity of the EP975 Alloy
Russian Metallurgy (Metally), 2018Co-Authors: E. V. Galieva, K. B. Povarova, A. A. Drozdov, V. A. ValitovAbstract:Experiments on solid-phase Pressure Welding (PW) of a wrought EP975 nickel superalloy with a Ni_3Al-based VKNA-25mono intermetallic alloy in a single-crystal state are performed under the superplasticity of the EP975 alloy, where its deformation was 24%. The structure and the phase composition of the interaction zone that forms between the materials to be joined after PW and PW followed by heat treatment are studied. The mechanical properties of the welded samples with a solid-phase joint are investigated. The ultimate tensile strength of the welded samples is shown to be 0.76 of the strength of the VKNA-25 alloy.
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Formation of Gradient Structures in the Zone of Joining a Deformable Nickel Alloy and a Single-Crystal Intermetallic Alloy during Thermodiffusion Pressure Welding and Subsequent Heat Treatment
Russian Metallurgy (Metally), 2018Co-Authors: K. B. Povarova, E. V. Galieva, V. A. Valitov, A. A. Drozdov, O. A. Bazyleva, E. G. ArginbaevaAbstract:The possibility of formation of a high-quality solid-phase joint of an Ni_3Al-based single-crystal intermetallic VKNA-25 blade alloy with a high-temperature deformable EP975 disk alloy by Pressure Welding is studied to create high-performance one-piece blisk unit for the next-generation aviation gas turbine engines and to decrease the unit mass. The influence of the conditions of thermodiffusion Pressure Welding under the hightemperature superplasticity of the disk alloy and the influence of heat treatment of welded joints on the gradient structures in the welded joint zone and the structure at the periphery of the welded samples are investigated.
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Mathematical modelling of the effect of the surface relief of specimens on the localisation of plastic deformation in the Pressure Welding zone
Welding International, 2016Co-Authors: A. Kh. Akhunova, V. A. Valitov, Sergey V. Dmitriev, E. V. Valitova, R. Ya. LutfullinAbstract:AbstractThe finite element method is used to analyse the special features of plastic deformation in the weld zone of dissimilar creep-resisting materials produced by Pressure Welding in the presence of a relief of variable depth on the welded surfaces. The experimental results show that the weld quality can be improved by selecting a larger depth of the relief away from the edges of the welded surfaces.
E. V. Galieva - One of the best experts on this subject based on the ideXlab platform.
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Effect of the Temperature of Pressure Welding of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy on the Structure and Properties of the Welded Joints
Russian Metallurgy (Metally), 2020Co-Authors: A. A. Drozdov, E. V. Galieva, V. A. Valitov, K. B. Povarova, O. A. Bazyleva, E. G. Arginbaeva, M. A. Bulakhtina, A. N. RaevskikhAbstract:This work is a continuation of the studies of the possibility of formation of a one-piece blisk unit for gas turbine engines by solid-phase Pressure Welding (PW) of a single-crystal [001] Ni_3Al-based VKNA-type blade alloy with a wrought EP975 disk nickel superalloy. The influence of the PW temperature at a strain of 10 and 24% on the structure and mechanical properties of welded specimens at room temperature is investigated. An increase in the process temperature by 50°C to 1175°C is shown not to change the structure of the VKNA-25 alloy, and the γ-phase grain sizes in the EP975 alloy increase from 7–8 to 15–18 μm. During tensile tests, the welded specimens fail through the VKNA-25 alloy, and the strength of the welded specimens fabricated at 1175°C is almost twice as high as that of the specimens fabricated by PW at 1125°C at the same strain of the EP975 alloy. Electron backscatter diffraction (EBSD) analysis of the solid-phase bonding zone demonstrates that the VKNA-25 alloy retains its single-crystal structure.
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Effect of the Deformation during Pressure Welding of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy on the Structure and Properties of the Welded Joints
Russian Metallurgy (Metally), 2019Co-Authors: A. A. Drozdov, E. V. Galieva, V. A. Valitov, K. B. Povarova, O. A. Bazyleva, M. A. Bulakhtina, E. G. ArginbaevaAbstract:The influence of the strain (24, 30, 40%) during the Pressure Welding (PW) of an EP975 alloy in a superplasticity state and subsequent high-temperature heat treatment of welded joints on their structure and room-temperature mechanical properties is studied to find the conditions of PW of a single-crystal [001] Ni_3Al-based VKNA-25 blade alloy and an EP975 disk alloy in order to fabricate a blisk. The tensile strength of the welded samples is found to be maximal after PW of the EP975 alloy at a strain of ~40%, and the strength reached at lower strains is also sufficiently high, 0.7–0.8 of the strength of the VKNA-25 blade alloy. To optimize the technology of solid-phase joining, it is reasonable to decrease the PW strain to 20% and to increase the Welding temperature to 1175°C.
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Structure and Properties of the Solid-Phase Joints of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy Formed by Pressure Welding at a Strain of 24% under the Superplasticity of the EP975 Alloy
Russian Metallurgy (Metally), 2018Co-Authors: E. V. Galieva, K. B. Povarova, A. A. Drozdov, V. A. ValitovAbstract:Experiments on solid-phase Pressure Welding (PW) of a wrought EP975 nickel superalloy with a Ni_3Al-based VKNA-25mono intermetallic alloy in a single-crystal state are performed under the superplasticity of the EP975 alloy, where its deformation was 24%. The structure and the phase composition of the interaction zone that forms between the materials to be joined after PW and PW followed by heat treatment are studied. The mechanical properties of the welded samples with a solid-phase joint are investigated. The ultimate tensile strength of the welded samples is shown to be 0.76 of the strength of the VKNA-25 alloy.
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Formation of Gradient Structures in the Zone of Joining a Deformable Nickel Alloy and a Single-Crystal Intermetallic Alloy during Thermodiffusion Pressure Welding and Subsequent Heat Treatment
Russian Metallurgy (Metally), 2018Co-Authors: K. B. Povarova, E. V. Galieva, V. A. Valitov, A. A. Drozdov, O. A. Bazyleva, E. G. ArginbaevaAbstract:The possibility of formation of a high-quality solid-phase joint of an Ni_3Al-based single-crystal intermetallic VKNA-25 blade alloy with a high-temperature deformable EP975 disk alloy by Pressure Welding is studied to create high-performance one-piece blisk unit for the next-generation aviation gas turbine engines and to decrease the unit mass. The influence of the conditions of thermodiffusion Pressure Welding under the hightemperature superplasticity of the disk alloy and the influence of heat treatment of welded joints on the gradient structures in the welded joint zone and the structure at the periphery of the welded samples are investigated.
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Experimental and Simulation Modeling of Nickel-Based Superalloy Pressure Welding Process
Materials Science Forum, 2016Co-Authors: E. V. Galieva, V. A. Valitov, Ramil Ya. Lutfullin, Sergey V. Dmitriev, A.k. Akhunova, Minnaul MukhametrakhimovAbstract:The paper presents the results of finite element analysis of plastic deformation in the contact zone of dissimilar superalloys subjected to Pressure Welding. The results are compared for the two cases: with and without relief on the surfaces of parts to be welded. It is shown that the relief made on the surface can either decrease or increase the area of deformation stagnant zones, depending on the relief shape. The results of simulations are compared with the experimental test results.
A. A. Drozdov - One of the best experts on this subject based on the ideXlab platform.
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Effect of the Temperature of Pressure Welding of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy on the Structure and Properties of the Welded Joints
Russian Metallurgy (Metally), 2020Co-Authors: A. A. Drozdov, E. V. Galieva, V. A. Valitov, K. B. Povarova, O. A. Bazyleva, E. G. Arginbaeva, M. A. Bulakhtina, A. N. RaevskikhAbstract:This work is a continuation of the studies of the possibility of formation of a one-piece blisk unit for gas turbine engines by solid-phase Pressure Welding (PW) of a single-crystal [001] Ni_3Al-based VKNA-type blade alloy with a wrought EP975 disk nickel superalloy. The influence of the PW temperature at a strain of 10 and 24% on the structure and mechanical properties of welded specimens at room temperature is investigated. An increase in the process temperature by 50°C to 1175°C is shown not to change the structure of the VKNA-25 alloy, and the γ-phase grain sizes in the EP975 alloy increase from 7–8 to 15–18 μm. During tensile tests, the welded specimens fail through the VKNA-25 alloy, and the strength of the welded specimens fabricated at 1175°C is almost twice as high as that of the specimens fabricated by PW at 1125°C at the same strain of the EP975 alloy. Electron backscatter diffraction (EBSD) analysis of the solid-phase bonding zone demonstrates that the VKNA-25 alloy retains its single-crystal structure.
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Effect of the Deformation during Pressure Welding of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy on the Structure and Properties of the Welded Joints
Russian Metallurgy (Metally), 2019Co-Authors: A. A. Drozdov, E. V. Galieva, V. A. Valitov, K. B. Povarova, O. A. Bazyleva, M. A. Bulakhtina, E. G. ArginbaevaAbstract:The influence of the strain (24, 30, 40%) during the Pressure Welding (PW) of an EP975 alloy in a superplasticity state and subsequent high-temperature heat treatment of welded joints on their structure and room-temperature mechanical properties is studied to find the conditions of PW of a single-crystal [001] Ni_3Al-based VKNA-25 blade alloy and an EP975 disk alloy in order to fabricate a blisk. The tensile strength of the welded samples is found to be maximal after PW of the EP975 alloy at a strain of ~40%, and the strength reached at lower strains is also sufficiently high, 0.7–0.8 of the strength of the VKNA-25 blade alloy. To optimize the technology of solid-phase joining, it is reasonable to decrease the PW strain to 20% and to increase the Welding temperature to 1175°C.
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Structure and Properties of the Solid-Phase Joints of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy Formed by Pressure Welding at a Strain of 24% under the Superplasticity of the EP975 Alloy
Russian Metallurgy (Metally), 2018Co-Authors: E. V. Galieva, K. B. Povarova, A. A. Drozdov, V. A. ValitovAbstract:Experiments on solid-phase Pressure Welding (PW) of a wrought EP975 nickel superalloy with a Ni_3Al-based VKNA-25mono intermetallic alloy in a single-crystal state are performed under the superplasticity of the EP975 alloy, where its deformation was 24%. The structure and the phase composition of the interaction zone that forms between the materials to be joined after PW and PW followed by heat treatment are studied. The mechanical properties of the welded samples with a solid-phase joint are investigated. The ultimate tensile strength of the welded samples is shown to be 0.76 of the strength of the VKNA-25 alloy.
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Formation of Gradient Structures in the Zone of Joining a Deformable Nickel Alloy and a Single-Crystal Intermetallic Alloy during Thermodiffusion Pressure Welding and Subsequent Heat Treatment
Russian Metallurgy (Metally), 2018Co-Authors: K. B. Povarova, E. V. Galieva, V. A. Valitov, A. A. Drozdov, O. A. Bazyleva, E. G. ArginbaevaAbstract:The possibility of formation of a high-quality solid-phase joint of an Ni_3Al-based single-crystal intermetallic VKNA-25 blade alloy with a high-temperature deformable EP975 disk alloy by Pressure Welding is studied to create high-performance one-piece blisk unit for the next-generation aviation gas turbine engines and to decrease the unit mass. The influence of the conditions of thermodiffusion Pressure Welding under the hightemperature superplasticity of the disk alloy and the influence of heat treatment of welded joints on the gradient structures in the welded joint zone and the structure at the periphery of the welded samples are investigated.
E. G. Arginbaeva - One of the best experts on this subject based on the ideXlab platform.
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Effect of the Temperature of Pressure Welding of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy on the Structure and Properties of the Welded Joints
Russian Metallurgy (Metally), 2020Co-Authors: A. A. Drozdov, E. V. Galieva, V. A. Valitov, K. B. Povarova, O. A. Bazyleva, E. G. Arginbaeva, M. A. Bulakhtina, A. N. RaevskikhAbstract:This work is a continuation of the studies of the possibility of formation of a one-piece blisk unit for gas turbine engines by solid-phase Pressure Welding (PW) of a single-crystal [001] Ni_3Al-based VKNA-type blade alloy with a wrought EP975 disk nickel superalloy. The influence of the PW temperature at a strain of 10 and 24% on the structure and mechanical properties of welded specimens at room temperature is investigated. An increase in the process temperature by 50°C to 1175°C is shown not to change the structure of the VKNA-25 alloy, and the γ-phase grain sizes in the EP975 alloy increase from 7–8 to 15–18 μm. During tensile tests, the welded specimens fail through the VKNA-25 alloy, and the strength of the welded specimens fabricated at 1175°C is almost twice as high as that of the specimens fabricated by PW at 1125°C at the same strain of the EP975 alloy. Electron backscatter diffraction (EBSD) analysis of the solid-phase bonding zone demonstrates that the VKNA-25 alloy retains its single-crystal structure.
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Effect of the Deformation during Pressure Welding of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy on the Structure and Properties of the Welded Joints
Russian Metallurgy (Metally), 2019Co-Authors: A. A. Drozdov, E. V. Galieva, V. A. Valitov, K. B. Povarova, O. A. Bazyleva, M. A. Bulakhtina, E. G. ArginbaevaAbstract:The influence of the strain (24, 30, 40%) during the Pressure Welding (PW) of an EP975 alloy in a superplasticity state and subsequent high-temperature heat treatment of welded joints on their structure and room-temperature mechanical properties is studied to find the conditions of PW of a single-crystal [001] Ni_3Al-based VKNA-25 blade alloy and an EP975 disk alloy in order to fabricate a blisk. The tensile strength of the welded samples is found to be maximal after PW of the EP975 alloy at a strain of ~40%, and the strength reached at lower strains is also sufficiently high, 0.7–0.8 of the strength of the VKNA-25 blade alloy. To optimize the technology of solid-phase joining, it is reasonable to decrease the PW strain to 20% and to increase the Welding temperature to 1175°C.
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Formation of Gradient Structures in the Zone of Joining a Deformable Nickel Alloy and a Single-Crystal Intermetallic Alloy during Thermodiffusion Pressure Welding and Subsequent Heat Treatment
Russian Metallurgy (Metally), 2018Co-Authors: K. B. Povarova, E. V. Galieva, V. A. Valitov, A. A. Drozdov, O. A. Bazyleva, E. G. ArginbaevaAbstract:The possibility of formation of a high-quality solid-phase joint of an Ni_3Al-based single-crystal intermetallic VKNA-25 blade alloy with a high-temperature deformable EP975 disk alloy by Pressure Welding is studied to create high-performance one-piece blisk unit for the next-generation aviation gas turbine engines and to decrease the unit mass. The influence of the conditions of thermodiffusion Pressure Welding under the hightemperature superplasticity of the disk alloy and the influence of heat treatment of welded joints on the gradient structures in the welded joint zone and the structure at the periphery of the welded samples are investigated.
K. B. Povarova - One of the best experts on this subject based on the ideXlab platform.
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Effect of the Temperature of Pressure Welding of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy on the Structure and Properties of the Welded Joints
Russian Metallurgy (Metally), 2020Co-Authors: A. A. Drozdov, E. V. Galieva, V. A. Valitov, K. B. Povarova, O. A. Bazyleva, E. G. Arginbaeva, M. A. Bulakhtina, A. N. RaevskikhAbstract:This work is a continuation of the studies of the possibility of formation of a one-piece blisk unit for gas turbine engines by solid-phase Pressure Welding (PW) of a single-crystal [001] Ni_3Al-based VKNA-type blade alloy with a wrought EP975 disk nickel superalloy. The influence of the PW temperature at a strain of 10 and 24% on the structure and mechanical properties of welded specimens at room temperature is investigated. An increase in the process temperature by 50°C to 1175°C is shown not to change the structure of the VKNA-25 alloy, and the γ-phase grain sizes in the EP975 alloy increase from 7–8 to 15–18 μm. During tensile tests, the welded specimens fail through the VKNA-25 alloy, and the strength of the welded specimens fabricated at 1175°C is almost twice as high as that of the specimens fabricated by PW at 1125°C at the same strain of the EP975 alloy. Electron backscatter diffraction (EBSD) analysis of the solid-phase bonding zone demonstrates that the VKNA-25 alloy retains its single-crystal structure.
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Effect of the Deformation during Pressure Welding of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy on the Structure and Properties of the Welded Joints
Russian Metallurgy (Metally), 2019Co-Authors: A. A. Drozdov, E. V. Galieva, V. A. Valitov, K. B. Povarova, O. A. Bazyleva, M. A. Bulakhtina, E. G. ArginbaevaAbstract:The influence of the strain (24, 30, 40%) during the Pressure Welding (PW) of an EP975 alloy in a superplasticity state and subsequent high-temperature heat treatment of welded joints on their structure and room-temperature mechanical properties is studied to find the conditions of PW of a single-crystal [001] Ni_3Al-based VKNA-25 blade alloy and an EP975 disk alloy in order to fabricate a blisk. The tensile strength of the welded samples is found to be maximal after PW of the EP975 alloy at a strain of ~40%, and the strength reached at lower strains is also sufficiently high, 0.7–0.8 of the strength of the VKNA-25 blade alloy. To optimize the technology of solid-phase joining, it is reasonable to decrease the PW strain to 20% and to increase the Welding temperature to 1175°C.
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Structure and Properties of the Solid-Phase Joints of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy Formed by Pressure Welding at a Strain of 24% under the Superplasticity of the EP975 Alloy
Russian Metallurgy (Metally), 2018Co-Authors: E. V. Galieva, K. B. Povarova, A. A. Drozdov, V. A. ValitovAbstract:Experiments on solid-phase Pressure Welding (PW) of a wrought EP975 nickel superalloy with a Ni_3Al-based VKNA-25mono intermetallic alloy in a single-crystal state are performed under the superplasticity of the EP975 alloy, where its deformation was 24%. The structure and the phase composition of the interaction zone that forms between the materials to be joined after PW and PW followed by heat treatment are studied. The mechanical properties of the welded samples with a solid-phase joint are investigated. The ultimate tensile strength of the welded samples is shown to be 0.76 of the strength of the VKNA-25 alloy.
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Formation of Gradient Structures in the Zone of Joining a Deformable Nickel Alloy and a Single-Crystal Intermetallic Alloy during Thermodiffusion Pressure Welding and Subsequent Heat Treatment
Russian Metallurgy (Metally), 2018Co-Authors: K. B. Povarova, E. V. Galieva, V. A. Valitov, A. A. Drozdov, O. A. Bazyleva, E. G. ArginbaevaAbstract:The possibility of formation of a high-quality solid-phase joint of an Ni_3Al-based single-crystal intermetallic VKNA-25 blade alloy with a high-temperature deformable EP975 disk alloy by Pressure Welding is studied to create high-performance one-piece blisk unit for the next-generation aviation gas turbine engines and to decrease the unit mass. The influence of the conditions of thermodiffusion Pressure Welding under the hightemperature superplasticity of the disk alloy and the influence of heat treatment of welded joints on the gradient structures in the welded joint zone and the structure at the periphery of the welded samples are investigated.