锻压技术

TC2管材超塑性变形行为

英文标题：Study on superplastic behavior of TC2 extrusion tube

作者：刘宝胜吴为曾元松韩秀全

关键词：TC2 超塑性 m值激活能 K值

分类号：

出版年,卷(期):页码：2014,39(4):122-125

摘要：

采用TC2管材纵向剖条试样，在880及920 ℃、初始应变速率分别为1.0×10-4，5.0×10-4，8.0×10-4，2.0×10-3和5.0×10-3 s-1条件下进行了超塑性拉伸试验。样本数据显示，TC2管材在880 ℃及应变速率1.0×10-4 s-1条件下获得最大伸长率为240%。基于等应变原则，结合Backofen超塑性本构方程，采用多试样法获得了不同温度下的m值。采用Arrhenius简化本构方程计算了TC2管激活能Q。最后，以斜率法和截距法计算了880及920 ℃时的K值，结果显示，2种方法计算结果接近。

The superplastic behavior of longitudinal cutting sample for TC2 extrusion tube was investigated at the temperatures of 880 and 920 ℃ and at the strain rates of 1.0×10-4，5.0×10-4，8.0×10-4，2.0×10-3 and 5.0×10-3s-1. According to the sample data, the maximum elongation of 240% was obtained at the condition of 880 ℃ and strain rate 1.0×10-4s-1. Based on equal strain principle and Backofen superplastic constitutive equation, the approach of multiple samples was applied to test the m value. The activation energy Q was also calculated by using Arrhenius equation. Finally, K values at 880 and 920 ℃ were calculated by using slope method and intercept method, and the results of which were close.

基金项目：

航空基金资助项目（201211250001）

刘宝胜（1979-），男，博士，工程师

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