Evolution of microstructure and deformation mechanisms in a metastable Fe42Mn28Co10Cr15Si5 high entropy alloy: A combined in-situ synchrotron X-ray diffraction and EBSD analysis

被引：29

作者：

Shen J. ^{[1
,7
]}

Zhang W. ^{[2
]}

Lopes J.G. ^{[1
]}

Pei Y. ^{[2
]}

Zeng Z. ^{[3
]}

Maawad E. ^{[4
]}

Schell N. ^{[4
]}

Baptista A.C. ^{[7
]}

Mishra R.S. ^{[5
,6
]}

Oliveira J.P. ^{[1
,7
]}

机构：

[1] UNIDEMI, Department of Mechanical and Industrial Engineering, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Caparica

[2] Advanced Production Engineering, Engineering and Technology Institute Groningen, Faculty of Science and Engineering, University of Groningen, Nijenborgh 4

[3] School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Sichuan

[4] Institute of Materials Physics, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, Geesthacht

[5] Center for Friction Stir Processing, Department of Materials Science and Engineering, University of North Texas, Denton, 76207, TX

[6] Advanced Materials and Manufacturing Processes Institute, University of North Texas, Denton, 76207, TX

[7] CENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Caparica

来源：

Materials and Design | 2024年 / 238卷

基金：

欧盟地平线“2020”;

关键词：

Deformation mechanisms; High entropy alloys; Synchrotron X-ray diffraction; Transformation induced plasticity; Transformation twinning;

D O I：

10.1016/j.matdes.2024.112662

中图分类号：

学科分类号：

摘要：

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. © 2024 The Author(s)

引用

共 138 条

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