摘要
采用X射线应力仪、粗糙度检测仪和透射电镜等对Ti1023钛合金孔挤压表面层性能进行对比分析,讨论带衬套孔的强化机理。结果表明：孔挤压（过盈量1%-3%）强化改善了孔壁表面粗糙度（Ra从1.722μm降低到了0.349μm）,增加了钛合金表面硬度（Hv值从32提高到了38）,引入了残余应力场分布,从而改善了钛合金的微动疲劳性能（极限值从385 MPa提高到了619 MPa）。
The property of the surface layer of twice hole expansion Ti1023 alloy was analyzed by TEM, X-ray and roughness tester, and the strengthen mechanism of the bushing hole expansion was discussed. The results indicate that the roughness（Ra1. 722→0. 349μm）, hardness（Hv32→38） and residual stress distribution of the hole are improved by twice hole expansion techniques,and the fret-ting wear fatigue（fatigue limits 385→619MPa）of Ti1023 alloy is improved.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2016年第6期68-73,共6页
Journal of Aeronautical Materials
关键词
孔挤压
微动疲劳
残余应力
疲劳性能
hole expansion
fretting wear fatigue
residual stress
fatigue property
