机械制造与自动化2023，Vol.52Issue(6)：15-17,44,4.DOI:10.19344/j.cnki.issn1671-5276.2023.06.004
根部圆角滚压强化的高精度钛合金螺栓疲劳失效研究
Research on Fatigue Failure of High-Precision Titanium Alloy Bolt Strengthened by Root Fillet Rolling
摘要
Abstract
In order to investigate the characteristics of fatigue failure of high-precision titanium alloy bolts after rolling strengthening for root fillet,the measurement and analysis of fatigue failure fractures were carried out.The characteristics of the rolling strengthening techniques of bolt root fillet were analyzed.The influence of various surface processing techniques for rolling bolts was compared,and the features of appearance as well as fracture of bolts were studied from macroscopic and microscopic views.The crack source characteristics of aluminum-coated bolts were discussed.The research results show that the fatigue fracture of root fillet of bolts after rolling exhibits significant ductile fracture characteristics,and aluminum coating,shot peening or polishing process can enhance the equiaxed dimple characteristics of the fracture,which confirms the domination of ductile fracture.Meanwhile,the study also reveals the interfacial peeling characteristics of aluminum coating.关键词
滚压强化/钛合金螺栓/根部圆角/断口形貌/检测Key words
rolling strengthening/titanium alloy bolt/root fillet/fracture morphology/measurement分类
机械制造引用本文复制引用
刘婧颖,李浩楠,徐昊,杨知硕,林忠亮,王洪飞,白清顺..根部圆角滚压强化的高精度钛合金螺栓疲劳失效研究[J].机械制造与自动化,2023,52(6):15-17,44,4.基金项目
天津市紧固连接技术企业重点实验室开放课题项目(TKLF2021-02-B-06) （TKLF2021-02-B-06）
