Analysis of the microstructure near the crack tip of ASME Gr.92 steel after creep crack growth

被引：29
|
作者：
Sawada, K. [1 ]
Hongo, H. [2 ]
Watanabe, T. [2 ]
Tabuchi, M. [1 ]
机构：
[1] Natl Inst Mat Sci, Mat Reliabil Ctr, Tsukuba, Ibaraki 3050047, Japan
[2] Natl Inst Mat Sci, Mat Data Sheet Stn, Tsukuba, Ibaraki 3050047, Japan
来源：
MATERIALS CHARACTERIZATION | 2010年 / 61卷 / 11期
关键词：
High Cr steel; Creep crack growth; Microstructural change; Stress state; FERRITIC STEELS;
D O I：
10.1016/j.matchar.2010.07.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructures near to and remote from the tip of a crack in ASME Gr 92 steel were investigated after creep crack growth at 873 and 898 K focusing on the martensitic lath the dislocation structure and precipitates After creep the mean lath width near the crack hp was obviously larger than that of the virgin material whereas the lath width remote from the crack tip was only slightly larger than that of the virgin material The mean dislocation density near the crack tip markedly decreased after creep whereas only a small change was observed in the dislocation density remote from the crack tip The mean size of M23C6 particles near the crack tip after creep was larger than that of the virgin material whereas their mean size remote from the crack hp was almost the same as that of the virgin material (C) 2010 Elsevier Inc All rights reserved
引用
收藏
页码：1097 / 1102
页数：6
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