摘要
推导了相似准则Ｒｅｃ，其描述了稳态扩展的蠕脆性裂尖变形奇异场．由７１８合金的蠕脆性裂纹扩展试验结果得到准则关联式，从而得到蠕脆性裂纹稳态扩展的速率公式．用扫描电子显微镜研究了蠕脆性裂纹稳态扩展的微观机理．
In order to describe steady state growing creep brittle crack tip singular field,the dimensionless parameter R ec is derived.Based on the experimental resulte of 718 alloy's creep brittle crack growth,the dimensionless parameter's relations have been obtained and the formula for steady state creep brittle crack growth rate has been derived.Microstructural examination is conducted on fracture surface by using sweep electron microscope.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1997年第4期413-419,共7页
Journal of Beijing University of Aeronautics and Astronautics
关键词
蠕变断裂
蠕脆性裂纹
高温
断裂力学
creep fracture
creep theory
creep rate
creep brittle crack
elastic/nonlinear viscous singular field
