通过热循环变形改善Ti80合金的超塑性  

Improvement of Superplasticity of Ti80 Alloy through Thermal Cycling Deformation

作　　者：李梁[1] 孙建科[1] 孟祥军[1] 刘茵琪[1] 陈卫[1] 

机构地区：[1]洛阳船舶材料研究所,河南洛阳471039

出　　处：《材料开发与应用》2005年第6期1-3,8,共4页Development and Application of Materials

摘　　要：研究了热循环变形后Ti80合金的超塑性.结果表明,在800～980℃温度范围内,m值大于0.3;在最高试验温度930℃,拉伸速度为0.2mm/min,循环5次的条件下,伸长率达350%;变形过程中晶粒首先得到细化,随后有所长大;变形后组织均匀,呈等轴状.Ti80合金表现出超塑特性.Superplasticity of Ti80 alloy is investigated after thermal cycling deformation at temperature below 930℃. The result shows that the strain rate sensitivity（ m ） of the alloy is more than 0.3 at trmperature from 800 to 980℃ and the elongation is 350 % at the highest temperature of test 930℃ with tensile rate of 0.2mm/min after 5 cycles. The grain is refined firstly and then grow up during deformation. The structure is homogeneous and the grain keeps equiaxed after deformation. Ti80 alloy exhibits superplastic properties.

关 键 词：Ti80合金 热循环 超塑性 

分 类 号：TG146.23[一般工业技术—材料科学与工程]