摘要
为研究TC4-DT钛合金的细化机理与超塑性变形行为，采用三维镦拔形变热处理改锻工艺对供货态的TC4-DT合金进行细晶化处理，并在电子拉伸实验机上采用最大m值法对细晶化和供应态的TC4DT进行拉伸实验。结果表明，采用三维镦拔工艺可简单有效的细化TC4-DT合金的原始组织，平均晶粒尺寸由原始组织的70μm细化至15μm；在变形温度850℃-900℃、最大m值法的试验条件下，处理后的TC4DT合金均表现出比供货态超塑性能好，最佳变形温度为870℃，最大延伸率可达到1233％。
In order to investigate superplastic deformation behavior and Refinement mechanism of TC4-DT Titanium alloy. In this paper, commercial TC4-DT titanium alloy grain refinement by three-dimensional upsetting and cogging ausform process firstly. Then using Maximum m value superplastic deformation method for fine crystalline superplastic and commercial TC4-DT alloy were studied. The final results show that： Using the three-dimensional upsetting and cogging ausform process refined original grains of TC4-DT alloy simply and effectively, Original average grain size from 70μm refined to 15μm. At the temperature 850℃ -900℃, by using Maximum m value superplastic deformiation method, TC4-DT alloy after composite ausform show better superplasticity than the commercial, the optimum temperature is 870℃, the best elongation can arrive at 1233%.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2013年第5期1-6,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51075196)
江西省教育厅基金资助项目(GJJ12451)
关键词
三维镦拔工艺
TC4-DT合金
细化晶粒
超塑性
three-dimensional upsetting and cogging
TCA-DT alloy
grain refinement
superplasticity
作者简介
喻淼真，男，1987，江西上饶人，南昌航空大学，硕士研究生，研究方向为钛合金超塑性成形E-mail：yumiaozhen87@126．com
