TA15钛合金板材单向拉伸超塑变形行为研究  

Superplastic Deformation Behavior of TA15 Alloy Sheet by Superplastic Tension

作　　者：付明杰[1] 许慧元[1] 邵杰[1] 韩秀全[1] 

机构地区：[1]北京航空制造工程研究所金属成形技术研究室,北京100024

出　　处：《稀有金属》2013年第3期353-358,共6页Chinese Journal of Rare Metals

基　　金：总装备部武器装备预研先进制造技术项目(51318040322)

摘　　要：采用TA15钛合金板材,研究了在860～980℃,8.3×10-4～1.7×10-3s-1条件下进行的超塑拉伸性能。结果标明:随着变形温度的升高,延伸率先增加后降低;在940℃、应变速率为1.7×10-3s-1、垂直轧制方向获得最大延伸率为1370%。随着变形温度的升高和拉伸速度的降低,等轴α晶粒尺寸增大。变形温度为940℃时诱发次生α相的析出,少量的层片组织对提高延伸率具有一定的作用。The results of superplastic tension of TA15 alloy sheet under the conditions of 860～980℃ and 8.3×10^-4～1.7×10^-3s^-1 showed the elongation increased firstly and decreased with the increase of deformation temperature. The largest elongation of 1370% was obtained at the optimal superplastic deformation condition of 940℃, 1.7×10^-3s^-1 and perpendicularity of rolling direction. The grain size of α phase increased with the increase of deformation temperature and the decrease of strain rate. The appearance of lamellar structure under deformation of 940 ℃ will have some advantages to the superplasticity.

关 键 词：TA15钛合金 超塑性 显微组织 

分 类 号：TG146[一般工业技术—材料科学与工程]