Effect of Mn concentration on the kinetics of strain induced precipitation in Ti microalloyed steels

被引：27
|
作者：
Wang, Zhenqiang [1 ,2 ]
Sun, Xinjun [2 ]
Yang, Zhigang [1 ]
Yong, Qilong [2 ]
Zhang, Chi [1 ]
Li, Zhaodong [2 ]
Weng, Yuqing [3 ]
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, Key Lab Adv Mat, Beijing 100084, Peoples R China
[2] Cent Iron & Steel Res Inst, Inst Struct Mat, Beijing 100081, Peoples R China
[3] Chinese Soc Met, Beijing 100711, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 561卷
基金：
中国国家自然科学基金;
关键词：
Precipitation; Kinetics; Ti microalloyed steel; Manganese; TEM; NB;
D O I：
10.1016/j.msea.2012.10.085
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The kinetics of strain induced precipitation in Ti-microalloyed steel with three levels of Mn was investigated using a two-stage interrupted compression (TSIC) test. The precipitation-time-temperature diagrams (PTT) were obtained by analyzing the softening kinetics curves of deformed austenite. Experimental results showed that the upper part of the PTT diagram for strain induced precipitation were shifted to lower temperatures and longer times as Mn concentration in steel was increased, but the retard effect of Mn on TiC precipitation weakened with decreasing testing temperature. Transmission electron microscopy (TEM) observation showed that the rate of TiC precipitation was decreased by more Mn addition at higher testing temperatures, which is in a good agreement with TSIC result. In addition, these results were discussed in terms of the effect of Mn on the solubility product of TiC in austenite, and the controlling factors of precipitation kinetics at different temperatures. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：212 / 219
页数：8
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