FATIGUE-CRACK GROWTH-BEHAVIOR OF WELD HEAT-AFFECTED ZONE OF TYPE-304 STAINLESS-STEEL IN HIGH-TEMPERATURE WATER

被引：11

作者：

ITATANI, M ^{[1
]}

FUKAKURA, J ^{[1
]}

ASANO, M ^{[1
]}

KIKUCHI, M ^{[1
]}

CHUJO, N ^{[1
]}

机构：

[1] TOSHIBA CO LTD,DEPT APPL MET & CHEM,ISOGO KU,YOKOHAMA,KANAGAWA 235,JAPAN

来源：

NUCLEAR ENGINEERING AND DESIGN | 1994年 / 153卷 / 01期

关键词：

Fatigue crack growth rate - Stainless steel type 304;

D O I：

10.1016/0029-5493(94)90018-3

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The fatigue crack growth behavior of the weld heat-affected zone (HAZ) of type 304 stainless steel in high temperature water which simulates the boiling-water reactor environment was investigated to clarify the effects of welding residual stress, cyclic frequency f and thermal aging on crack growth rate. A lower crack growth rate of the HAZ than of the base metal was observed in both the high temperature water and the ambient air caused by the compressive residual stress. The crack closure point was measured in the high temperature water. The effect of the welding residual stress on the crack growth rate of the HAZ can be evaluated separately from the environmental effect through the crack closure behavior. The high temperature water increased the crack growth rate at a cyclic frequency of 0.0167 Hz but did not affect it much at 3 and 5 Hz. The crack growth behavior of the thermally aged HAZ at 400 degrees C for 1800 h was almost the same as that of the unaged material tested at 0.0167 and 5 Hz in the high temperature water.

引用

页码：27 / 34

页数：8