Investigation of strain-induced martensitic transformation in metastable austenite using nanoindentation

被引：147
作者：
Ahn, T. -H. [1 ,2 ]
Oh, C. -S.
Kim, D. H. [1 ,2 ]
Oh, K. H. [1 ,2 ]
Bei, H. [3 ]
George, E. P. [3 ,4 ]
Han, H. N. [1 ,2 ]
机构：
[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea
[2] Seoul Natl Univ, RIAM, Ctr Iron & Steel Res, Seoul 151744, South Korea
[3] Korean Inst Mat Sci, Ferrous Alloys Res Grp, Chang Won 641831, South Korea
[4] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
来源：
SCRIPTA MATERIALIA | 2010年 / 63卷 / 05期
关键词：
Martensitic phase transformation; Nanoindentation; Pop-in; Nucleation of phase transformations; INDUCED PLASTICITY; MICROSTRUCTURE; DEFORMATION; MECHANISMS; STEEL; MODEL;
D O I：
10.1016/j.scriptamat.2010.05.024
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Strain-induced martensitic transformation of metastable austenite was investigated by nanoindentation of individual austenite grains in multi-phase steel. A cross-section prepared through one of these indented regions using focused ion beam milling was examined by transmission electron microscopy. The presence of martensite underneath the indent indicates that the pop-ins observed on the load displacement curve during nanoindentation correspond to the onset of strain-induced martensitic transformation The pop-ins can be understood as resulting from the selection of a favorable martensite variant during nanoindentation (C) 2010 Acta Materialia Inc Published by Elsevier Ltd All rights reserved
引用
收藏
页码：540 / 543
页数：4
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