Experimental evidence for bainite formation below Ms in Fe-0.66C

被引：131
作者：
van Bohemena, S. M. C. [1 ,2 ]
Santofimia, M. J. [1 ,2 ]
Sietsma, J. [1 ]
机构：
[1] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 CD Delft, Netherlands
[2] Netherlands Inst Met Res, NL-2628 CD Delft, Netherlands
来源：
SCRIPTA MATERIALIA | 2008年 / 58卷 / 06期
关键词：
bainitic phase transformation; kinetics; martensite; scanning electron microscopy; dilatometry;
D O I：
10.1016/j.scriptamat.2007.10.045
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The isothermal decomposition of austenite in the temperature range 220-300 degrees C in Fe-0.69Mn-0.66C has been studied using dilatometry and scanning electron microscopy (SEM). Analysis of the dilatometry curves shows that after athermal martensite formation is interrupted below M-s = 264 degrees C, the austenite continues to decompose isothermally at a certain rate, which is in agreement with the kinetics of bainite formation above M-s. This strongly indicates that isothermal bainite is formed below M-s, which is supported by SEM images showing a mixed martensite-bainite microstructure. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：488 / 491
页数：4
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