TY - JOUR
T1 - Microstructure and mechanical properties of gas metal arc welded CoCrFeMnNi joints using a 410 stainless steel filler metal
AU - Shen, Jiajia
AU - Gonçalves, Rita
AU - Choi, Yeon Taek
AU - Lopes, J. G.
AU - Yang, Jin
AU - Schell, N.
AU - Kim, Hyoung Seop
AU - Oliveira, J. P.
N1 - info:eu-repo/grantAgreement/FCT/OE/2020.07350.BD/PT#
info:eu-repo/grantAgreement/EC/H2020/730872/EU#
Funding Information:
JS, JGL and JPO acknowledge Fundação para a Ciência e a Tecnologia (FCT - MCTES ) for its financial support via the project UID/00667/2020 ( UNIDEMI ). JPO acknowledges the funding of CENIMAT/i3N by national funds through the FCT-Fundação para a Ciência e a Tecnologia , I.P., within the scope of Multiannual Financing of R&D Units , reference UIDB/50025/2020-2023 . JS acknowledges the China Scholarship Council for funding the Ph.D. grant ( CSC NO. 201808320394 ). This work was supported by the National Research Foundation of Korea (NRF) with a grant funded by the Korea government ( MSIP ) ( NRF-2021R1A2C3006662 ). The authors acknowledge DESY (Hamburg, Germany), a member of the Helmholtz Association HGF, for the provision of experimental facilities. Beamtime was allocated for proposal I-20210899 EC.
Publisher Copyright:
© 2022 The Authors
PY - 2022/11/1
Y1 - 2022/11/1
N2 - The use of filler materials during fusion-based welding processes is widely used to regulate and modify the composition of the welded joints aiming at producing a desired microstructure and/or achieving an improvement in its mechanical performance. Welding of high entropy alloys is still a new topic and the impact of different filler materials on the microstructure and mechanical properties is yet unknown. In this work, gas metal arc welding of the CoCrFeMnNi high entropy alloy using 410 stainless steel as a filler wire was performed. The microstructural evolution of the welded joints was evaluated by optical microscopy, scanning electron microscopy aided by electron backscattered diffraction, high energy synchrotron X-ray diffraction and thermodynamic calculations. Meanwhile, the mechanical behavior of the welded joint, as well as the local mechanical response were investigated with microhardness mapping measurements and with non-contact digital image correlation during tensile loading to failure. The weld thermal cycle promoted solid state reactions in the heat affected zone (recovery, recrystallization and grain growth), which impacted the microhardness across the joint. The role of the 410 stainless steel filler material in the solidification path experienced by the fusion zone was evaluated using Scheil-Gulliver calculations, and a good agreement with the experimentally observed phases was observed. Despite the addition of the 410 stainless steel filler was not conducive to an increase in the fusion zone hardness, the associated bead reinforcement promoted an improvement in both the yield and tensile strengths of the joint compared to a similar weld obtained without filler material (355 vs 284 MPa and 641 vs 519 MPa, respectively). This allows to infer that the addition of filler materials for welding high entropy alloys is a viable method for the widespread use of these novel materials. In this work, by coupling microstructure and mechanical property characterization, a correlation between the processing conditions, microstructure and mechanical properties was obtained providing a wider basis for promoting the application of gas metal arc welding of high entropy alloys for industrial applications.
AB - The use of filler materials during fusion-based welding processes is widely used to regulate and modify the composition of the welded joints aiming at producing a desired microstructure and/or achieving an improvement in its mechanical performance. Welding of high entropy alloys is still a new topic and the impact of different filler materials on the microstructure and mechanical properties is yet unknown. In this work, gas metal arc welding of the CoCrFeMnNi high entropy alloy using 410 stainless steel as a filler wire was performed. The microstructural evolution of the welded joints was evaluated by optical microscopy, scanning electron microscopy aided by electron backscattered diffraction, high energy synchrotron X-ray diffraction and thermodynamic calculations. Meanwhile, the mechanical behavior of the welded joint, as well as the local mechanical response were investigated with microhardness mapping measurements and with non-contact digital image correlation during tensile loading to failure. The weld thermal cycle promoted solid state reactions in the heat affected zone (recovery, recrystallization and grain growth), which impacted the microhardness across the joint. The role of the 410 stainless steel filler material in the solidification path experienced by the fusion zone was evaluated using Scheil-Gulliver calculations, and a good agreement with the experimentally observed phases was observed. Despite the addition of the 410 stainless steel filler was not conducive to an increase in the fusion zone hardness, the associated bead reinforcement promoted an improvement in both the yield and tensile strengths of the joint compared to a similar weld obtained without filler material (355 vs 284 MPa and 641 vs 519 MPa, respectively). This allows to infer that the addition of filler materials for welding high entropy alloys is a viable method for the widespread use of these novel materials. In this work, by coupling microstructure and mechanical property characterization, a correlation between the processing conditions, microstructure and mechanical properties was obtained providing a wider basis for promoting the application of gas metal arc welding of high entropy alloys for industrial applications.
KW - CoCrFeMnNi high Entropy alloy
KW - Digital image correlation
KW - ER410-NiMo stainless steel filler wire
KW - Gas metal arc welding
KW - Mechanical testing
KW - Synchrotron X-ray diffraction
KW - Thermodynamic calculations
UR - http://www.scopus.com/inward/record.url?scp=85139337681&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2022.144025
DO - 10.1016/j.msea.2022.144025
M3 - Article
AN - SCOPUS:85139337681
SN - 0921-5093
VL - 857
JO - Materials Science and Engineering: A-Structural Materials Properties Microstructure and Processing
JF - Materials Science and Engineering: A-Structural Materials Properties Microstructure and Processing
M1 - 144025
ER -