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.

引用

页码：488 / 491

页数：4

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