作者：谢卿, 王弘, 王赟斌

作者单位：西南交通大学力学与工程学院, 四川成都 610031

关键词：医用酒精; TC4钛合金; 单轴拉伸; 超声疲劳; 渗氢; 氢脆

摘要：

在常温下对经医用酒精浸泡过的TC4钛合金试样进行单轴拉伸实验和超声疲劳实验,以研究医用酒精溶液对TC4钛合金力学性能的影响。单轴拉伸实验结果表明酒精对TC4钛合金的单轴拉伸力学性能影响极小,而经酒精浸泡再放置一段时间后,TC4钛合金的屈服强度有一定的变化。超声疲劳疲劳试验结果表明TC4钛合金经酒精浸泡后,其疲劳性能明显下降。酒精对TC4钛合金力学性能影响,是由于医用酒精降低了TC4钛合金内局部塑性,钛合金在酒精溶液中发生渗氢反应,使钛合金固溶氢浓度增加,在外载荷作用下,氢向材料缺陷处扩散富集,形成氢脆降低了材料局部塑性。

Influence of medical alcohol solution on TC4 titanium alloy mechanical properties

XIE Qing, WANG Hong, WANG Yun-bin

School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China

Abstract: The mechanical properties of TC4 Titanium alloy immersed in alcohol solution had been investigated by using the tensile test and the ultrasonic fatigue test.The results of tensile test show that alcohol has little influence on tensile properties of TC4 Titanium alloy, but the yield strength changes to a certain degree if the alloy deposited in air for a week after immersing in medical alcohol.The results of fatigue test show that the fatigue property of TC4 Titanium alloy decline sharply after immersing in medical alcohol.The mechanical property of TC4 Titanium alloy changes with the reduction of plasticity within a small area, and then, the tensile properties change a little, and the fatigue life which is sensitive to changing of microstructure sharply reduce.Hydrogen permeates into TC4 alloy (Hydrogen Permeation Process) during the immersing, HPP raises the concentration of hydrogen in the alloy.Hydrogen diffuses to the defects of the material under the influence of the force act on specimen, and causes the hydrogen embrittlement.

Keywords: Medical alcohol; TC4 titanium; Tensile; Ultrasonic fatigue; Hydrogen permeation process; Hydrogen embrittlement

2009, 35(4): 4-6  收稿日期: 2008-11-14;收到修改稿日期: 2009-1-19

基金项目: 国家自然基金项目(10872175)西南交通大学科学研究基金项目(2007B06)

作者简介: 谢卿(1984-),男,陕西西安市人,博士研究生,主要从事金属材料超高周疲劳性能研究。

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