Direct experimental mapping of microscale deformation heterogeneity in duplex stainless steel

被引：48

作者：

Jia, N. ^{[1
]}

Peng, R. Lin ^{[2
]}

Chai, G. C. ^{[3
]}

Johansson, S. ^{[2
]}

Wang, Y. D. ^{[1
]}

机构：

[1] NE Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110004, Peoples R China

[2] Linkoping Univ, Dept Mech Engn, S-58183 Linkoping, Sweden

[3] SFM, R&D, Sandvik Mat Technol, S-81181 Sandviken, Sweden

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 491卷 / 1-2期

关键词：

plastic deformation; electron back-scattering diffraction; dual phases; stainless steel; simulations;

D O I：

10.1016/j.msea.2008.02.021

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In situ tensile test has been performed with the electron back-scattering diffraction (EBSD) technique for characterizing the deformation heterogeneity at microscopic level of a duplex stainless steel consisting of austenite and ferrite. It was observed that, as deformation proceeded, the fraction of low-angle boundaries continuously increased and strain gradient developed at some grain boundaries and twin boundaries, as well as in the interior of some grains. The in situ experiments quantitatively captured the change of grain-orientation-dependent plastic behavior in respective phases and the strain partition between duplex phases as a function of applied strain. Using a visco-plastic self-consistent (VPSC) model incorporating the accommodation of micromechanical properties of grains with different orientations in two phases, the evolution of microstresses/microstrains at various length scales was simulated and discussed in detailed within the material undergoing plastic deformation. The experimental observations are well explained by the VPSC model. The present investigations provide the in-depth understanding of anisotropic micromechanical behaviors of the duplex steel. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：425 / 433

页数：9

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