摘要
研究了Ｔｉ３Ａｉ－Ｎｂ系合金经三种固溶和稳定化处理后，在室温和７００℃疲劳裂纹扩展的规律．分析了影响疲劳裂纹扩展速率ｄａ／ｄＮ的诸多因素，结合ＳＥＭ断口，裂纹扩展路径观察及ＴＩＭ分析结果进行了讨论，并用ＦＯＲＴＲＡＮ程序绘出各种实验条件下的△Ｋ－ｄａ／ｄＮ曲线．
The fatigue crack propagation behavior at ambient temperaturn and 700℃ in a Ti3Al-Nb System alloy under different different have been studied. Some factors that influence fatigue crack propagation rate da/dN have been analyzed. Microstructures, fractUre surfaces under different testing have been observed by opticol microscope, SEM and TEM. Curves on △k-da/dN under some testing conditions have been made by Fortran programe.
出处
《沈阳工业大学学报》
CAS
1996年第3期64-69,共6页
Journal of Shenyang University of Technology
基金
国家自然科学基金
关键词
TI3AL
疲劳裂纹扩展
金属间化合物
断裂
Ti_3Al system alloys /fatigue crack propagation /stress intensity factor /stress ratio
