Suppressed martensitic transformation under biaxial loading in low stacking fault energy metastable austenitic steels

被引：51
|
作者：
Polatidis, E. [1 ]
Hsu, W. -N. [1 ,2 ]
Smid, M. [1 ]
Panzner, T. [3 ]
Chakrabarty, S. [4 ]
Pant, P. [4 ]
Van Swygenhoven, H. [1 ,2 ]
机构：
[1] Paul Scherrer Inst, Swiss Light Source, Photons Engn & Mfg Grp, CH-5232 Villigen, Switzerland
[2] Ecole Polytech Fed Lausanne, IMX, Neutrons & Xrays Mech Mat, CH-1012 Lausanne, Switzerland
[3] Paul Scherrer Inst, NUM, Lab Neutron Scattering, CH-5232 Villigen, Switzerland
[4] Indian Inst Technol, Dept Met Engn & Mat Sci, Bombay 400076, Maharashtra, India
来源：
SCRIPTA MATERIALIA | 2018年 / 147卷
基金：
欧洲研究理事会;
关键词：
Metastable stainless steel; Martensite; TRIP; Stacking fault; Partial dislocations; DEFORMATION-INDUCED TRANSFORMATION; 304; STAINLESS-STEEL; MECHANICAL-PROPERTIES; STRAIN STATE; MICROSTRUCTURE; DISLOCATION; NUCLEATION; DEPENDENCE; BEHAVIOR; KINETICS;
D O I：
10.1016/j.scriptamat.2017.12.026
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of uniaxial/biaxial loading on the martensitic transformation of a low stacking fault energy, metastable austenitic stainless steel was studied by in-situ neutron diffraction on cruciform-shaped/dogbone samples. Uniaxial loading favors the martensitic transformation following the sequence gamma -> epsilon -> alpha', where at low strains epsilon-martensite is the precursor of alpha'. During equibiaxial-loading, the evolving texture suppresses the formation of 5-martensite and considerably less alpha'-martensite is observed at high strains. The results are discussed with respect to the deformation textures, the loading direction and the mechanism of the epsilon-martensite transformation. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd.
引用
收藏
页码：27 / 32
页数：6
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