Ti-15-3合金高温变形机制分析  

Study on the high temperature deformation mechanism of Ti-15-3 alloy

作　　者：张青[1] 李萍[1] 薛克敏[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥安徽230009

出　　处：《合肥工业大学学报（自然科学版）》2006年第10期1189-1191,1195,共4页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(50405020);安徽省优秀青年科技基金资助项目(04044058)

摘　　要：对Ti-15-3合金进行了等温压缩物理模拟试验,计算不同变形条件下的激活能数值,探讨此合金高温变形的主要机制。结果表明,在实验范围内,变形是一个热激活过程,其中变形速率对激活能的影响不大,而随温度和变形量的升高,激活能呈下降趋势。变形合金的透射电镜照片表明位错的攀移和交滑移为合金变形的主要机制。Hot compression experiments on Ti-15-3 alloy are carried out on the Gleeble-1500 thermal simulator. Deformation activation energy under different deforming conditions is calculated and the main mechanism of high temperature deformation is discussed. The results show that deformation is a heat activating course in the range of experiments, that the influence of the stain rate on the deforma- tion activation energy is not evident, and that with the increasing of the temperature and the deforming degree, the deformation activation energy shows the decreasing tendency. The TEM photo shows that dislocation climb and cross-slip are the important deformation modes of the alloy.

关 键 词：TI-15-3合金 高温变形 激活能 变形机制 

分 类 号：TG146[一般工业技术—材料科学与工程]