高压高温处理对TC4钛合金微观力学性能的影响  

Effect of high pressure-high temperature treatment on micro-mechanical properties of TC4 alloy

作　　者：王大勇[1] 张连勇[1] 谌岩[2] 王慧[1] 

机构地区：[1]辽宁工程技术大学机械工程学院,辽宁阜新123000 [2]燕山大学环境与化学工程学院,河北秦皇岛066004

出　　处：《金属热处理》2016年第2期143-146,共4页Heat Treatment of Metals

基　　金：河北省自然科学基金(E2014203135);燕山大学青年教师自主研究计划课题(14LGA015)

摘　　要：对TC4钛合金进行高压高温处理,利用纳米压痕技术测试了高压高温处理前后TC4钛合金微观力学性能,借助光学显微镜和透射电镜对其组织进行分析,探讨了高压高温处理对TC4钛合金微观力学性能的影响。结果表明,高压高温处理能增大TC4钛合金的硬度、弹性模量和硬弹比,减小其蠕变速率,其原因主要是高压高温处理能细化TC4钛合金组织,增大合金内部的位错密度。Micro-mechanical properties of TC4 titanium alloy before and after high pressure-high temperature treatment were measured by nano-indentation technique,and the microstructure was analyzed by optical microscopy and transmission electron microscopy. Effect of high pressure-high temperature treatment on micromechanical properties was also discussed. The results show that high pressure-high temperature treatment can increase the hardness,elastic modulus and hardness / Young＇s modules ratio of the TC4 titanium alloy,and decrease its creep rate,which is mainly due to the high pressure-high temperature treatment can refine the microstructure and increase internal dislocations density of TC4 titanium alloy.

关 键 词：TC4钛合金 高压高温处理 纳米压痕技术 力学性能 

分 类 号：TG113.25[金属学及工艺—物理冶金]