The evaluation of material degradation in modified 9Cr-1Mo steel by the electrochemical technique

被引：4
|
作者：
Hyun, Y
Lee, J
Kim, I
机构：
[1] Korea Inst Machinery & Mat, Test & Evaluat Ctr, Kyungnam, South Korea
[2] Pusan Natl Univ, Sch Met Engn, Pusan, South Korea
来源：
ADVANCES IN NONDESTRUCTIVE EVALUATION, PT 1-3 | 2004年 / 270-273卷
关键词：
material degradation; modified 9Cr-1Mo steel; polarization; electrochemical technique;
D O I：
10.4028/www.scientific.net/KEM.270-273.1206
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Evolution of microstructure due to service exposure to high temperature has a strong effect performance of heat resistant steels. In case of modified 9Cr-1Mo steels, precipitation of Fe2Mo-type laves phases and coarsening of M23C6-type carbides is the primary cause of degradation of mechanical properties such as creep resistance, tensile strength and toughness. Creep tests have been carried out on pre-aging modified 9Cr-1Mo steels to examine the effect of pre-aging and stress on the creep strength. Based on the results, a nondestructive procedure, where electrochemical technique that quantitatively detect laves phases and M23C6-type carbides in a material is used, has been proposed to evaluate a residual creep life of modified 9Cr-1Mo steels.
引用
收藏
页码：1206 / 1211
页数：6
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