Ti-1023合金超塑性压缩时的流动应力及显微组织  

FLOW STRESS AND MICROSTRUCTURE OF Ti-1023 ALLOYUNDER SUPER PLASTIC COMPRESSION

作　　者：赵雪盈[1] 郭鸿镇[1] 姚泽坤[1] 谭勇[1] 王斌[1] 赵静[1] 

机构地区：[1]西北工业大学,西安710072

出　　处：《上海金属》2005年第5期26-30,共5页Shanghai Metals

摘　　要：在α+β两相区和β单相区对Ti-1023合金进行了恒应变速率等温超塑性压缩试验,实测得到了一组流动应力-应变曲线.实验结果表明:应变速率对Ti-1023合金的流动应力有显著影响,变形温度对流动应力的影响程度与应变速率大小密切相关;较低温度快速压缩时易得到均匀细小的等轴α相组织,慢速压缩时组织有一定粗化.较佳超塑性压缩温度为760℃～740℃,应变速率可根据锻件成形、组织性能及生产率的需要在一定范围内选取.The isothermal super plastic compression test with constant strain rate was carried out at the α＋β double phase regions andβ single phase region of the Ti-1023 alloy. A group of stress - strain curves were obtained through the test. The results showed that the strain rate affected the flow stress on Ti-1023 alloy obviously, the effect extent of deformation temperature on flow stress was related to the magnitude of strain rate. The uniform, fine and equiaxed α phase structure was obtained by rapid compression at lower temperature, but the structure was coarsened definitely under low compression. The better super plastic compression temperature was between 760℃ and 740℃, the strain rate could be selected from appropriate range according to the requirement of forging forming, structural character and productivity.

关 键 词：TI-1023合金 恒应变速率 等温超塑性压缩 流动应力 显微组织 超塑性压缩 应力-应变曲线 压缩试验 影响程度 变形温度 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TG146.21[金属学及工艺—金属材料]