氢对Ti-60钛合金显微组织和高温力学性能的影响  

EFFECTS OF HYDROGEN ON THE MICROSTRUCTURE AND HIGH TEMPERATURE MECHANICAL PROPERTIES OF Ti-60 ALLOY

作　　者：李芳[1] 陈业新[1] 万晓景[1] 王青江[2] 刘羽寅[2] 

机构地区：[1]上海大学材料研究所,上海200072 [2]中国科学院金属研究所,沈阳110016

出　　处：《金属学报》2006年第2期143-146,共4页Acta Metallurgica Sinica

摘　　要：随着氢浓度增加,Ti-60合金中的初生α相的体积分数、(α+β)→β相变点及高温屈服强度均连续降低,高温拉伸时合金的最低屈服点出现在相应氢浓度下的(α+β)→β相变点处,进一步增加氢含量反而使合金的屈服强度升高,其原因是氢强化了β相。Ti-60合金中氢浓度ω(H)与(α+β)→β相变点满足方程：t(α+β)→β(℃)=815+210exp(-3ω(H)),900℃拉伸时,0．3％的氢使合金的屈服强度降幅达70％。The volume fraction of primary α-phase, the （α＋β）→βtransformation temperature and high temperature yield strength of Ti-60 alloy are continuously decreased with increasing hydrogen content in the alloy. The minimum yield strength of the alloy at high temperature occurs at the hydrogen concentration corresponding to the （α＋β）→β transition and then increases due to the hardening effect of hydrogen addition on the β-phase. The relationship between hydrogen concentration and （α＋β）→βtransformation temperature can be expressed as： t（α＋β）→β（℃）=815＋210exp（-3w（H））. Tensile at 900 ℃ will make the yield strength reduce about 70% for the alloy containing 0.3% hydrogen.

关 键 词：Ti-60钛合金 氢 相变点 屈服强度 

分 类 号：TG146.23[一般工业技术—材料科学与工程]