Si元素对钛合金热稳定性影响研究  

Research on Effect of Si Element on Thermal Stability of Titanium Alloy

作　　者：朱培亮 辛社伟 毛小南[1,2] 张思远 刘卓萌[1] Zhu Peiliang;Xin Shewei;Mao Xiaonan;Zhang Siyuan;Liu Zhuomeng(School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China)

机构地区：[1]东北大学材料科学与工程学院,辽宁沈阳110819 [2]西北有色金属研究院,陕西西安710016

出　　处：《钛工业进展》2024年第1期1-7,共7页Titanium Industry Progress

基　　金：国家自然科学基金资助项目(52071275)。

摘　　要：在不同温度下对3种不同Si含量的Ti-Si二元合金进行100h的热暴露实验,并通过力学性能表征其热稳定性,研究了Si元素对钛合金热稳定性的影响。结果表明,在实验条件下,Si元素的加入提高了合金的抗拉强度,Si含量越高,强度提升幅度越大;在热暴露过程中,当热暴露温度高于450℃时,Ti-Si合金的抗拉强度呈下降趋势,经500℃/100 h热暴露处理后表现出最差的热稳定性,其中Ti-0.4Si合金的伸长率降低至28.0%。Si元素扩散与偏聚形成的Ti_(5)Si_(3)是影响Ti-Si合金热稳定性的主要因素。Three Ti-Si binary alloys with different Si content were exposed to heat for 100 h at different temperatures,and their thermal stability was characterized by mechanical properties testing.The effect of Si element on the thermal stability of titanium alloy was studied.The results show that under the experimental conditions,the addition of Si element improves the tensile strength of the alloy,and the higher the Si content,the greater increase in strength.In the process of thermal exposure,the tensile strength of the Ti-Si alloys decreases when the thermal exposure temperature is higher than 450℃.The Ti-Si alloys show the worst thermal stability at 500℃/100 h thermal exposure,and the elongation of Ti-0.4Si alloy is reduced to 28.0%.The Ti_(5)Si_(3) formed by the diffusion and segregation of Si elements is the main factor affecting the thermal stability of the Ti-Si alloy.

关 键 词：SI元素 钛合金 热稳定性 Ti_(5)Si_(3) 

分 类 号：TG146.23[一般工业技术—材料科学与工程]