摘要
通过对层状TiAl基合金进行拉伸卸载试验及拉伸试验,同时通过断口分析,研究了全层状TiAl基合金平板拉伸试验的断裂过程.结合宏观试验结果与断口分析发现,随着预损伤程度的增加,裂纹面密度增大;平板拉伸直接断裂试样的断裂过程与拉伸-卸载后拉断试样的断裂过程一致,单位面积断裂功基本不变.这说明预损伤并不影响这种材料的断裂过程和最终的断裂性能.
The facture process of fully-lamellar TiA1 alloys is investigated by tensile-unloading test and tensile test, and analysis of fracture surface. It is found that the areal density of cracks increases with the increasing of the degree of pre-damage, and the fracture process of plate tensile fracture is consistent with that of tensile-unloading-fracture, the fracture energy per unit area remains basically unchanged, It means that pre-damage has no effect on the fracture process and final fracture properties of lamellar titanium aluminum alloy.
出处
《兰州理工大学学报》
CAS
北大核心
2005年第5期1-4,共4页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(50471109)
关键词
层状TiAl基合金
拉伸卸载
预损伤
裂纹面密度
单位面积断裂功
lamellar titanium aluminum alloys
tensile-unloading
pre-damage
crack＇s areal density
fracture energy pre unit area
