Application of Nomarski differential interference contrast microscopy to highlight the prior austenite grain boundaries revealed by thermal etching

被引：21
|
作者：
San Martin, D. [1 ]
Palizdar, Y. [2 ]
Cochrane, R. C. [2 ]
Brydson, R. [2 ]
Scott, A. J. [2 ]
机构：
[1] Ctr Nacl Invest Met CENIM CSIC, Dept Met Phys, MATERALIA Grp, Madrid 28040, Spain
[2] Univ Leeds, Inst Mat Res, SPEME, Leeds LS2 9JT, W Yorkshire, England
来源：
MATERIALS CHARACTERIZATION | 2010年 / 61卷 / 05期
关键词：
Low-carbon steel; Austenite; Grain boundary; Thermal etching; Optical microscopy; Nomarski microscopy;
D O I：
10.1016/j.matchar.2010.03.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Revealing prior austenite grain boundaries by thermal etching has been demonstrated to be a reliable and fast method compared to chemical etching for microalloyed carbon steels. However, sometimes visualization of the thermally etched prior austenite grain boundaries is hindered by the presence of grain boundaries of other phases (e.g. ferrite and/or pearlite) which are thermally etched during slow cooling from high temperature. This work shows that, under these conditions, the use of Nomarski differential interference contrast microscopy under bright field illumination helps to highlight the thermally etched prior austenite grain boundaries. (C) 2010 Elsevier Inc. All rights reserved.
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页码：584 / 588
页数：5
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