Plastic yielding in lath martensites - An alternative viewpoint

被引：62
作者：
Hutchinson, Bevis [1 ]
Bate, Pete [1 ]
Lindell, David [1 ]
Malik, Amer [1 ]
Barnett, Matthew [2 ]
Lynch, Peter [2 ]
机构：
[1] SwereaKIMAB, Box 7047, SE-16407 Kista, Sweden
[2] Deakin Univ, Inst Frontier Mat, Pigdons Rd, Geelong, Vic 3217, Australia
来源：
ACTA MATERIALIA | 2018年 / 152卷
关键词：
Martensite; Yielding; Residual stress; Diffraction; Modelling; CARBON-STEEL; FE-C; BEHAVIOR; STRENGTH; DEFORMATION; MICROSTRUCTURE; TEMPERATURE; DIFFRACTION; FERRITE; ALLOYS;
D O I：
10.1016/j.actamat.2018.04.039
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In recent literature the gradual yielding of quenched martensitic steels has been attributed to either heterogeneous microstructures having different strength levels or to the presence of small scale, Type II, residual stresses. Using in-situ tensile testing in synchrotron diffraction experiments in combination with crystal plasticity finite element modelling (CPFEM) we show that the dominant influence on yielding derives from the residual stresses which are a product of the displacive transformation from austenite during quenching. As plastic straining proceeds, the measured diffraction peaks become narrower and asymmetric, as predicted by the CPFEM calculations. The model predictions are generally in good agreement with published results showing large variations in local strains in different microstructural elements. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：239 / 247
页数：9
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