铸造技术2024，Vol.45Issue(2)：142-147,6.DOI:10.16410/j.issn1000-8365.2024.3304
医用钛合金表面纳米化组织与性能研究
Study on the Microstructure and Mechanical Properties of Medical Titanium Alloy after Surface Nanocrystallization
摘要
Abstract
In this study,surface of type near β-type TLM titanium alloy samples were subjected to high-energy shot peening treatment at different time.The microstructure and mechanical properties of the samples after different shot peening time were observed using metallographic microscopy(OM),scanning electron microscopy(SEM),X-ray diffraction(XRD),and microhardness testing.Research has shown that nanocrystallization occurs near the surface of samples after shot peening,forming a certain thickness of nanocrystalline layer.As the duration of the shot peening treatment increases,the average grain size of the surface layer decreases,and the grain size has a gradient change along the thickness direction.The further away from the shot peening surface,the larger the grain size will be.Moreover,compared with that of the matrix,the microhardness of the nanocrystalline layer significantly improves.The greater the distance from the surface is,the lower the microhardness.The increase in hardness is mainly due to the strengthening effect of surface grain refinement.关键词
TLM钛合金/高能喷丸/表面纳米化/组织/力学性能Key words
TLM titanium alloy/high energy shot peening/surface nanocrystallization/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
柴艳,于源,王瑜..医用钛合金表面纳米化组织与性能研究[J].铸造技术,2024,45(2):142-147,6.基金项目
国家重点研发计划(2023YFB3405800) （2023YFB3405800）
中国民航大学民航热灾害防控与应急重点实验室开放基金课题(RZH2021-KF-01) （RZH2021-KF-01）
中国科学院青年创新促进会会员(2021423) （2021423）
