Ti_3Al金属间化合物超塑性的研究进展  

Progress in Studying on Superplasticity of Ti_3Al Intermetallic Compound

作　　者：刘莹莹[1] 姚泽坤[1] 郭鸿镇[1] 

机构地区：[1]西北工业大学材料学院,西安710072

出　　处：《材料工程》2008年第4期65-69,共5页Journal of Materials Engineering

摘　　要：详细的对Ti3Al金属间化合物的超塑性研究进展状况进行了总结和评述。根据现有的研究结果可知，此类合金的最佳超塑性变形温度为940-980℃，最佳超塑性变形的应变速率为10^-4～10^-3s^-1，其最大延伸率可达1500％左右，接近于普通钛合金的超塑性水平。Ti3Al金属间化合物超塑变形的主要机制是晶界滑动，失效的主要原因是空洞的形成和连接。针对已取得的研究成果和在目前研究中仍然存在的问题，提出了一些有关Ti3Al金属间化合物超塑性研究的看法。The progress in studying on the superplasticity of Ti3Al intermetallic compound is summarized and evaluated in detail. According to the results that have been obtained, the optimal superplastic deformation temperature as well as strain rate of this kind of alloy are within 940-980℃ and 10^-4～ 10^-3 s^-1, respectively. Its largest elongation is about 1500℃, which approaches the superplasticity level of the conventional Ti alloy. Its main mechanism of superplasticity deformation is grain boundary sliding, and the main reason of failure is the formation and conjunction of the voids. In the light of the experimental results and the existing questions, further research and some prospects are proposed.

关 键 词：Ti3Al金属间化合物 超塑性 晶界滑动 空洞 

分 类 号：TG132.3[一般工业技术—材料科学与工程]