锻造工艺对Ti-6Al-4V-4Zr-Mo合金绝热剪切敏感性的影响  

Effects of Forging Processing on Adiabatic Shearing Sensitivity of Ti-6Al-4V-4Zr-Mo Alloy

作　　者：李建崇[1] 李树奎[1] 范群波[1] 裴传虎[1] 

机构地区：[1]北京理工大学,北京100081

出　　处：《稀有金属材料与工程》2010年第A01期60-63,共4页Rare Metal Materials and Engineering

摘　　要：对铸造态Ti-6Al-4V-4Zr-Mo合金采用两种不同的锻造工艺(α+β锻造,β锻造)进行热加工,使用Hopkinson Bar技术对这两种不同状态的合金进行动态剪切试验,研究了不同锻造工艺对该合金绝热剪切敏感性的影响。结果表明,α+β锻后试样的微观组织为细小的等轴状组织,β锻后的组织为晶粒粗大的网篮状组织。当加载条件高于其临界应变率时,两种试样的承载时间均随着应变率的提高而降低,β锻造后的试样较α+β锻后的试样具有更高的绝热剪切敏感性。The casting Ti-6Al-4V-4Zr-Mo alloy was forged using two different forging methods, including forging at β phase range, as well as forging at α＋β phase range. Dynamic shearing experiments on the two kinds of materials were carried out by the technology of split Hopkinson Bar. The adiabatic shearing sensitivity under different morphologies and different strain rates were studied. The results show that the specimen by （α＋β） forging processing has relatively lower adiabatic shearing sensitivity than that by β forging processing, because the former is composed of the fine equiaxed grains and the latter is characterized as big lamellar morphology.

关 键 词：钛合金 锻造 绝热剪切敏感性 组织 

分 类 号：TG319[金属学及工艺—金属压力加工]