摘要
采用液压伺服疲劳试验机在模拟体液中对人工关节常用316L不锈钢进行了微动疲劳试验,研究了疲劳产生的过程。结果表明:模拟体液中氧含量变化会影响316L不锈钢的微动疲劳寿命,溶解氧质量分数为4%,循环次数为10~7次时,微动疲劳强度约为110 MPa,溶解氧质量分数为0%,循环次数为3×10~6次时,微动疲劳强度约为105 MPa;在模拟体液中316L不锈钢的裂纹扩展速率比在大气中的快,因此其微动疲劳寿命比在大气中的短。
The fretting fatigue test in simulated body fluid was carried out by hydraulic servo fatigue testing machine for 316L stainless steel which is commonly used as artificial joint material.The results show that the oxygen concentration in the simulated body fluid had an effect on fretting fatigue life of 316L stainless steel.When the mass fraction of dissolved oxygen in simulated body fluid was 4%and the number of cycle was 10~7,the fretting fatigue strength was about 110 MPa.When the mass fraction of dissolved oxygen was 0%and the number of cycle was 3×10~6,the fretting fatigue strength was about 105 MPa.The crack growth speed in simulated body fluid was faster than that in air,so the fretting fatigue life was shorter than that in air.
作者
李积武
张辉
LI Jiwu;ZHANG Hui(School of Mechanical and Electrical Engineering,Jiaxing University,Jiaxing 314001,China)
出处
《腐蚀与防护》
CAS
北大核心
2020年第6期48-52,共5页
Corrosion & Protection
基金
嘉兴市科技计划项目(2017AY13005)。
关键词
316L不锈钢
模拟体液
微动疲劳
生物材料
氧
316Lstainless steel
simulated body fluid
fretting fatigue
biological material
oxygen
