TY - JOUR
T1 - Evolution of microstructure and deformation mechanisms in a metastable Fe42Mn28Co10Cr15Si5 high entropy alloy
T2 - A combined in-situ synchrotron X-ray diffraction and EBSD analysis
AU - Shen, Jiajia
AU - Zhang, Wei
AU - Lopes, J. G.
AU - Pei, Yutao
AU - Zeng, Zhi
AU - Maawad, E.
AU - Schell, N.
AU - Baptista, Ana C.
AU - Mishra, Rajiv S.
AU - Oliveira, J. P.
N1 - Funding Information:
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0037%2F2020/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50025%2F2020/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50025%2F2020/PT#
info:eu-repo/grantAgreement/FCT//2020.07350.BD/PT#
info:eu-repo/grantAgreement/EC/H2020/730872/EU#
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).
JS acknowledges the China Scholarship Council for funding the Ph.D. grant (CSC NO. 201808320394).
ZZ acknowledges Science and Technology Project of Sichuan Province (2020ZDZX0015). 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:
© 2024 The Author(s)
PY - 2024/2
Y1 - 2024/2
N2 - In this work, a combination of in-situ high synchrotron X-ray diffraction and electron backscattered diffraction were used to systematically investigate the activation and evolution of the deformation mechanisms in an as-cast Fe42Mn28Co10Cr15Si5 metastable high entropy alloy deformed until fracture at room temperature. This work unveils the critical role of the dual-phase γ-f.c.c. / ε-h.c.p. microstructure on the deformation response of the alloy. The different deformation modes, i.e., slip, transformation induced plasticity (TRIP) and transformation induced twinning (TWIP), were seen to initiate at different loading stresses and then to overlap. Quantitative microstructural characterization, which included the evolution of the phase fraction, stress partitioning, dislocation density, c/a ratio and lattice strain for different planes, was performed to elucidate the role of each phase on the macroscopic mechanical response of the metastable high entropy alloy. Furthermore, the magnitude of the different strengthening contributions has been quantified for the first time.
AB - In this work, a combination of in-situ high synchrotron X-ray diffraction and electron backscattered diffraction were used to systematically investigate the activation and evolution of the deformation mechanisms in an as-cast Fe42Mn28Co10Cr15Si5 metastable high entropy alloy deformed until fracture at room temperature. This work unveils the critical role of the dual-phase γ-f.c.c. / ε-h.c.p. microstructure on the deformation response of the alloy. The different deformation modes, i.e., slip, transformation induced plasticity (TRIP) and transformation induced twinning (TWIP), were seen to initiate at different loading stresses and then to overlap. Quantitative microstructural characterization, which included the evolution of the phase fraction, stress partitioning, dislocation density, c/a ratio and lattice strain for different planes, was performed to elucidate the role of each phase on the macroscopic mechanical response of the metastable high entropy alloy. Furthermore, the magnitude of the different strengthening contributions has been quantified for the first time.
KW - Deformation mechanisms
KW - High entropy alloys
KW - Synchrotron X-ray diffraction
KW - Transformation induced plasticity
KW - Transformation twinning
UR - http://www.scopus.com/inward/record.url?scp=85183462938&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2024.112662
DO - 10.1016/j.matdes.2024.112662
M3 - Article
AN - SCOPUS:85183462938
SN - 0264-1275
VL - 238
JO - Materials and Design
JF - Materials and Design
M1 - 112662
ER -