CREEP CAVITY NUCLEATION AND GROWTH IN 12CR-MO-V STEEL

被引:32
作者
WU, R
SANDSTROM, R
机构
[1] Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm
基金
瑞典研究理事会;
关键词
D O I
10.1179/mst.1995.11.6.579
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Quantitative measurements of the number of cavities per unit area, mean cavity size, and cavitated area fraction are carried out on creep tested specimens of a 12Cr-Mo-V martensitic steel. Both interrupted and ruptured specimens are included. Cavities initiate at an early stage of tests. The number of cavities, mean cavity size, and cavitated area fraction exhibit a continued increase with increasing strain and time. At rupture, the number of cavities is about 30 000 mm(-2), and the mean cavity size has a maximum value of about 2.5 mu m. The cavitated area fraction is approximately 0.1% at 1% strain, 0.5% at 2% strain, and 10% at rupture. Cavity initiation and growth are analysed regarding temperature, stress, strain, and str ain rate. A constrained cavity growth model is discussed and compared with the experimental results.
引用
收藏
页码:579 / 588
页数:10
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