当前位置：首页 > 过刊浏览->2024年45卷第6期
医用钛合金表面喷丸后微米压痕研究
Research on the Microindentation of Medical Titanium Alloy Surfaces after Shot Peening
浏览(931) 下载(10)
- DOI:
- 作者:
- 柴 艳 1 ，于 源 2 ， 3 ，王 瑜 1 ，郭 珉 4
CHAI Yan 1 , YU Yuan 2,3 , WANG Yu 1 , GUO Min 4
- 作者单位:
- 1. 陕西盛航鑫材科技有限公司，陕西 西安 712000；2. 中国科学院兰州化学物理研究所 固体润滑国家重点实验室，甘 肃 兰州 730000；3. 青岛市资源化学与新材料研究中心，山东 青岛 266000；4. 中国兵器科学研究院 宁波分院，浙江 宁 波 315103
1. Shaanxi Shenghang Xincai Technology Co., Ltd., Xi'an 712000, China; 2. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; 3. Qingdao Center of Resource Chemistry & New Materials, Qingdao 266000, China; 4. Ningbo Branch of Chinese Academy of Ordnance Science, Ningbo 315103, China
- 关键词:
- 钛合金；高能喷丸；表面纳米晶化；微压痕测试
titanium alloy; high-energy shot peening; surface nanocrystallization; microindentation testing
- 摘要:
- 采用高能喷丸强化 (HESP) 对医用钛合金进行了表面处理，并采用 SEM 、 AFM 、 TEM 和微米压痕对处理过程的微观组织演变及其微观力学性能进行了研究。 结果表明，经过 HESP 处理，在材料表面形成了梯度组织，并且材料表面粗糙度随着冲击时间的增加而先增加后降低，逐渐趋于稳定； TEM 分析显示材料表面经过处理形成了纳米晶。 通过微米压痕分析发现，强化后的样品弹性模量随加工时间的增加而减小，最小值出现在处理 60 min 的表面位置，约为59.026 GPa ，相对于未处理样品下降了 15.78% ，且随着喷丸时间的增加，屈服强度和应变硬化指数逐渐增加。In this study, high-energy shot peening (HESP) was used to treat the surface of a medical titanium alloy, and the microstructure evolution and micromechanical properties during the treatment process were studied using scanning electron microscopy (SEM), atomic force microscopy (AFM), transmission electron microscopy (TEM), and microindentation. Research has shown that after HESP treatment, a gradient structure is formed on the surface of the material. With increasing impact time, the surface roughness of the material first increases, then decreases, and then gradually stabilizes. TEM analysis shows that nanocrystals are formed at the surface of the material after HESP treatment. Microindentation analysis reveals that the elastic modulus of the strengthened sample decreases as the processing time increases, with a minimum value of approximately 59.026 GPa appearing at the surface position after 60 min of treatment, a decrease of 15.78% compared to that of the untreated sample. Moreover, with increasing shot peening time, the yield strength and strain hardening index gradually increase.