Correlation of Fe/Cr phase decomposition process and age-hardening in Fe-15Cr ferritic alloys

被引：18
|
作者：
Chen, Dongsheng [1 ]
Kimura, Akihiko [2 ]
Han, Wentuo [2 ]
机构：
[1] Kyoto Univ, Grad Sch Energy Sci, Kyoto 6110011, Japan
[2] Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan
来源：
JOURNAL OF NUCLEAR MATERIALS | 2014年 / 455卷 / 1-3期
关键词：
DISPERSION-STRENGTHENED STEELS; FE;
D O I：
10.1016/j.jnucmat.2014.07.069
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of thermal aging on the microstructure and mechanical properties of Fe-15Cr ferritic model alloys were investigated by TEM examinations, micro-hardness measurements and tensile tests. The materials used in this work were Fe-15Cr, Fe-15Cr-C.and Fe-15Cr-X alloys, where X refers to Si, Mn and Ni to simulate a pressure vessel steel. Specimens were isothermally aged at 475 degrees C up to 5000 h. Thermal aging causes a significant increase in the hardness and strength. An almost twice larger hardening is required for embrittlement of Fe-15Cr-X relative to Fe-15Cr. The age-hardening is mainly due to the formation of Cr-rich alpha' precipitates, while the addition of minor elements has a small effect on the saturation level of age-hardening. The correlation of phase decomposition process and age-hardening in Fe-15Cr alloy was interpreted by dispersion strengthened models. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：436 / 439
页数：4
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