氢对Ti-Al-V钛合金的冲击韧性及组织的影响  

Influence of Hydrogen on Impact strength and Microstrcture of the Titanium Alloy Ti-Al-V

作　　者：李远睿[1] 黄本多[1] 何庆兵[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《重庆大学学报（自然科学版）》2003年第2期127-131,共5页Journal of Chongqing University

基　　金：国家"九.五"项目 (982 1)

摘　　要：在分析和试验了Ti-Al-V钛合金锻材的化学成分、金相组织和室温机械性能后 ,将其加工成冲击试样 ,采用人工吸氢法使其获得了不同的氢含量。继而 ,测出了该种钛合金的冲击韧性值 (aK)与氢含量的关系曲线。随后 ,用氢含量为 4 8ppm、137ppm、36 1ppm和 6 6 6ppm的 4个样品和它们各自的冲击断口 ,分别进行了金相和扫描电镜 (SEM)的分析工作 ,获得了不同氢含量的此种钛合金的金相组织及其氢化物在组织中的分布和形态 ;再结合对不同氢含量试样的冲击断口的SEM分析结果 。Absract:After analyzed and tested the composition, microstructure and the mechanical property for the forging timber of the titanium alloy Ti-Al-V, Processed it into lash test samples , and made the samples having different hydrgen-content by the way of artificial hydrogen-absorption. Next, measured the impact strength vaules(ak ) of the titanium alloy in different hydrogen-content, and drawn the relation curve between the impact strength and the hydrogen-content. Afertwards,four samples and themselves impact fractographies whose hydrogen-contents are 48ppm,137ppm, 361ppm and 666ppm have been used for phases and the sweep electorn microscopes,Known microstructures and shapes of the hydrogenate of the different hydrogen-content tianium alloy and that the hydrogenate is sheet and its distribution in the titanium alloy.

关 键 词：Ti-Al-A钛合金 氢 冲击韧性 组织 近Α钛合金 

分 类 号：TG146.23[一般工业技术—材料科学与工程]