摘要
钛和钛合金可作为医用植入材料,有必要对其耐人体体液的侵蚀性能进行研究。用超声疲劳试验技术研究了室温下生理盐水中浸泡24 h后Ti-6A l-4V钛合金(TC4)的超高周疲劳性能,并与未经浸泡的同种材料的超声疲劳性能进行了对比分析。疲劳试验进行到109循环周次以上。结果显示,实验材料的S-N曲线均呈现缓慢下降趋势,材料不存在常规疲劳中的疲劳极限,经生理盐水浸泡24 h后对实验材料的超高周疲劳寿命无明显影响。用电子扫描电镜观测,实验材料表现为穿晶塑性断裂。
Titanium and Titanium alloy can be used as medical implants and its corrision resistance to hu-man body fluid should be studied. The ultrasonic fatigue test method has been used to investigate the giga-cycle fatigue properties of commercial titanium alloy TC4 dipped into physiological saline solution for 24 h prior to testing. The results show that the physiological saline solution treatment hardly influences the ul-trasonic fatigue life of TC4. The fractography pictures indicate the fracture to be transcrystalline plastic.
出处
《西南科技大学学报》
CAS
2007年第2期5-8,共4页
Journal of Southwest University of Science and Technology
基金
四川省杰出青年基金资助(06ZQ026-004)
关键词
钛合金
超声疲劳
S-N曲线
titanium alloy
ultrasonic fatigue
S-N curve
