TA15合金热变形行为研究
Study on Hot Deformation Behavior of TA15 Alloy
摘 要
用Gleeble-1500型热模拟试验机对TA15合金进行了变形温度为650~1 000 ℃、应变速率为0.001~1s-1的热压缩试验,研究了工艺参数对流变应力及组织的影响,计算了应力速率敏感指数m及变形激活能Q,建立了本构方程.结果表明:流变应力随变形温度升高而降低,随应变速率提高而增大;应力速率敏感指数m随变形温度的升高而增大.650~850 ℃时变形激活能为386.32 kJ/mol,850~1 000 ℃时为479.365 kJ/mol,预示在不同的温度区间具有不同的变形机制.
热变形
变形激活能
本构方程
TA15 alloy
thermal deformation
deformation activation energy
constitutive equation
Abstract
The high temperature compression tests of TA15 alloy were carried on Gleeble-1500 simulator.The temperature is from 650 ℃ to 1 000 ℃.The strain rate is from 0.001 s-1 to 1 s-1.The influence of processing parameters on the flow stress and the microstructure was studied.The strain rate sensitivity m and deformation activation energy Q were calculated.And the constitutive equation was presented.The results show that the flow stress decreases with the increase of temperature,while increases with the increase of strain rate.The value of m increases with the increase of deformation temperature.The deformation activation energy Q is 386.320 kJ/mol at 650-850 ℃ and 479.365 kJ/mol at 850-1 000 ℃,which means the two temperature ranges correspond to different deformation mechanism.
中图分类号 TG146.2
所属栏目
基金项目
收稿日期 2005/10/17
修改稿日期 2006/10/15
网络出版日期
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备注王洋(1978-),男,黑龙江哈尔滨人,博士研究生.
引用该论文: WANG Yang,YOU Feng-hai,ZHU Jing-chuan,LAI Zhong-hong,LIU Yong. Study on Hot Deformation Behavior of TA15 Alloy[J]. Materials for mechancial engineering, 2006, 30(11): 63～65
王洋,尤逢海,朱景川,来忠红,刘勇. TA15合金热变形行为研究[J]. 机械工程材料, 2006, 30(11): 63～65
被引情况:
【1】贾元伟, "2507双相不锈钢模拟焊接热影响区的组织与性能",理化检验－物理分册 50, 417-420(2014)
【2】董显娟,鲁世强,王克鲁,方军,吴超, "基于Murty判据的粗片层状TA15钛合金β相区锻造工艺参数优化",机械工程材料 33, 67-71(2009)
【3】张开国,卢俊,缪竹骏,吴元彪,吕维洁,宋洪伟, "Inconel 690合金的高温拉伸变形行为",机械工程材料 35, 16-19(2011)
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参考文献
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【5】熊爱明,陈胜晖,黄维超,等.TC6钛合金的高温变形行为及组织演变[J].稀有金属材料与工程,2003,32(6):447-450.
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