氢对两种新型钛合金强度和塑性的影响  

Effects of Hydrogen on Strength and Plasticity of Two Types of New Titanium Alloys

作　　者：何晓[1] 沈保罗[1] 曹建玲[1] 邱绍宇[2] 邹红[2] 

机构地区：[1]四川大学 [2]中国核动力研究设计院,四川成都610041

出　　处：《稀有金属材料与工程》2003年第5期390-393,共4页Rare Metal Materials and Engineering

摘　　要：采用变截面薄板试样,研究了4种氢含量对2种新型钛合金强度和塑性的影响。发现氢对Ti-2Al-2.5Zr强度的影响不大,却能较大幅度地提高Ti-4Al-2V的强度,增幅可达16%左右。氢含量升高使2种钛合金的断面收缩率下降。α+β两相钛合金的氢脆敏感性在氢含量大于150μg/g后大于单相的α钛合金。认为钛合金氢致硬化主要来源于固溶的原子氢,而钛合金的氢脆主要来源于晶界析出的氢化物。Four hydrogen contents have been employed to investigate the effects on strength and plasticity of two types of new titanium alloys by using section-varied samples. Results show that hydrogen has little effect on strength of Ti-2Al-2.5Zr, meanwhile increases strength of Ti-4Al-2V by about 16%. Increasing hydrogen content makes drop of psi. Susceptibility of Ti-4Al-2V to hydrogen-embrittlement is larger than that of Ti-2Al-2. 5Zr in condition of over 150mug/g hydrogen content. Conclusion has been obtained that strengthening of the titanium alloys comes from interstitial atomic hydrogen and embrittlement from hydride mainly.

关 键 词：钛合金 强度 氢脆 氢化物 

分 类 号：TG146.2[一般工业技术—材料科学与工程]