摘要：本文研究模擬體液腐蝕對醫用植入鈦合金Ti-6Al-4V超高周疲勞性能的影響。采用超聲對稱拉壓疲勞，開展了Ti-6Al-4V在三種不同環境條件下的105~ 109周次范圍內的疲勞性能。這三種環境條件分別為：（i） 實驗室大氣；（ii） 模擬體液浸泡預腐蝕30天；（iii） 加載過程中模擬體液實時噴注。結果顯示，疲勞循環超過107 周次后，仍然發生疲勞斷裂，并不存在傳統意義上的疲勞極限。三種不試驗環境同條件下的S-N曲線呈相似的趨勢，都是連續下降。模擬體液浸泡預腐蝕，對Ti-6Al-4V超高周疲勞性能性能幾乎沒有影響。然而，與實驗室大氣環境條件的試驗結果相比，模擬體液噴注顯著降低了Ti-6Al-4V疲勞強度。

　　關鍵詞：論文，修改，格式（提供5個左右反映論文主題的關鍵字）

 Influence of simulated body fluid corrosion on very high cycle fatigue properties of Ti-6Al-4V
LI Jiu-kai¹, LIU Yong-jie¹, He Chao¹, WANG Qing-yuan^1,2*
(1．Key Laboratory of Energy Engineering Safety and Disaster Mechanics, Ministry of Education, College of Architecture and Environment, Sichuan University, Chengdu 610065, China；
School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China)

　　Abstract:This paper is devoted to the effect of simulated body fluid （ SBF ） corrosion on the very high cycle fatigue properties of implanted medical Ti-6Al-4V alloy. Ultrasonic fatigue tests were performed under fully reversed tension between 105 and 109 cycles in three testing conditions and environments: （i） in laboratory air, （ii） in air after SBF pre-corrosion and （iii） under real time SBF flow. Fracture could still occur beyond 107 cycles, it demonstrated that there was no fatigue limit as the traditional fatigue conception described. The results showed that all the S-N curve had the similar tendency and descended continuously during 105 and 109 cycles. And SBF subjection pre-corrosion almost had no effect on the fatuge behavior. However the fatigue strength of the Ti-6Al-4V was remarkably degraded compared with the case tested in laboratory air.

　　Key words:Titanium alloys, Simulated body fluid, Very high cycle fatigue, Ultrasonic fatigue, S-N curve

　　聯系方式

　　李久楷：JackieLeeCN@163.com

責任編輯：趙澤南

《中國腐蝕與防護網電子月刊》征訂啟事
投稿聯系：劉娟 電話：010-82387968-807
QQ: 2850329508 郵箱：liujuan@ecorr.org
中國腐蝕與防護網官方 QQ群：140808414