机械科学与技术2012，Vol.31Issue(4)：643-647,5.
高低周复合载荷对钛合金疲劳裂纹扩展性能的影响
The Effect of Combined Cycle Fatigue Load on the Fatigue Crack Propagation of Titanium Alloy
赵振华 1陈伟 1吴铁鹰1
作者信息
- 1. 南京航空航天大学能源与动力学院,南京210016
- 折叠
摘要
Abstract
The rotor blade and disk in the fan and compressor of aero-engine is subjected with combined high and low cycle loading.In order to ascertain the effects of the combined cycle situation on the fatigue crack propagation,the combined cycle fatigue（CCF）,and low cycle fatigue（LCF） of TC11 titanium alloy have been carried out respectively.When ΔK（HCF）ΔKth,the combined loading accelerates crack growth.Scanning electron microscope is used to observe fractography.Fatigue fringe of LCF fracture surface is clearer and secondary cracks is deep,the direction and distribution of secondary cracks is messy.CCF fracture surface has the characteristics that obvious secondary cracks and small fatigue fringe are approximately equably distributed.For a given HCF ΔK,ΔKtotal in CCF is greater and crack opening is bigger.During the crack propagation under CCF loading,dimples and cleavage are clearer.关键词
TC11钛合金/高低周复合载荷/裂纹扩展/断口分析Key words
TC11 titanium alloy/combined high and low cycle load/crack propagation/fracture surface analysis分类
航空航天引用本文复制引用
赵振华,陈伟,吴铁鹰..高低周复合载荷对钛合金疲劳裂纹扩展性能的影响[J].机械科学与技术,2012,31(4):643-647,5.
