LAW OF CRACK GROWTH LIFE FOR P92 STEEL UNDER THE CONDITIONS OF CREEP-FATIGUE MULTIPLICATION AND PROJECTION OF THE THRESHOLD TEMPERATURE OF CREEP CRACK GROWTH BASED ON THIS LAW

被引：0
|
作者：
Yokobori, A. T., Jr. [1 ]
Sugiura, R. [1 ]
Kimoto, S. [1 ]
Yoshino, D. [1 ]
Matsuzaki, T. [1 ]
机构：
[1] Tohoku Univ, Grad Sch Engn, Sendai, Miyagi 980, Japan
来源：
PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, VOL 6, PTS A AND B | 2010年
关键词：
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
W-added 9Cr ferritic heat-resistant steels, ASME grade P92, are used under the high temperature creep-fatigue condition. Concerning the maintenance of the operational safety and minimizing operational costs, it is necessary to construct a law of predicting the crack growth life by clarifying the dominant factors of the crack growth life under the condition of creepfatigue multiplication (the effect of stress holding time on the time-dependent fracture). In this study, crack growth tests under the conditions of creep-fatigue multiplication were conducted with various conditions of stress holding time, applied stress and temperatures. As a result, a unified law of predicting the crack growth life under the conditions of creep-fatigue multiplication was derived based on the concept of Q* with the transition function of crack growth life from fatigue to creep.
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页码：1451 / 1460
页数：10
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