摘要
采用扫描电镜原位拉伸和原位疲劳实验,直接跟踪观察人工植入夹杂(Ａｌ２Ｏ３)的粉末高温合金(Ｐ/Ｍ Ｒｅｎｅ９５)中夹杂物的微观力学行为(特别是裂纹的萌生、扩展以致断裂的过程)．同时,采用ＡＮＳＹＳ有限元分析软件,建立含夹杂物的Ｐ/ＭＲｅｎｅ９５合金的有限元分析模型,计算在受力状态下夹杂物及其周围基体的应力应变场分布,进而从宏观力学角度分析夹杂物的微观力学行为．
Special designed SEM in situ tensile and fatigue tests have been conducted to trace the whole process of crack initiation and propagation till to fracture of Al2O3 seeded P/M Rene 95 Ni-base superalloy. Stress and strain field distribution around inclusions has been calculated by means of elasto-plastic finite element method(FEM)with a commercial software of ANSYS. Further analyses have been conducted in combination with the results of in situ tensile and fatigue tests and FEM simulation.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第6期635-642,共8页
Acta Metallurgica Sinica
基金
国家自然科学基金59871007资助项目
关键词
粉末高温合金
夹杂物
裂纹萌生
扩展
断裂
P/M Ni-base superalloy
inclusion
crack initiation and propagation
fracture
