TA15合金的热变形行为及加工图  

Deformation Behavior and Processing Map of High Temperature Deformation of TA15 Alloy

作　　者：李淼泉[1] 李晓丽[1] 龙丽[1] 许广兴[2] 于浩[3] 迟彩楼 温国华[3] 

机构地区：[1]西北工业大学,陕西西安710072 [2]沈阳飞机设计研究所,辽宁沈阳110035 [3]沈阳飞机工业集团有限公司,辽宁沈阳110034

出　　处：《稀有金属材料与工程》2006年第9期1354-1358,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50475144);国家"973"(G2000067206);全国高校首届"优秀青年教师"奖励基金资助

摘　　要：研究了TA15合金的热模拟压缩实验。结果表明:变形温度的升高和应变速率的减小使峰值应力和稳态应力显著降低,变形温度会影响进入稳态流动所需变形量。以热模拟压缩实验为基础,建立的加工图表明:TA15合金高温变形时存在2个非稳定区域,一个是变形温度1300K以上和应变速率10.0s-1以上的区域,另一个是变形温度1200K以下和应变速率0.006s-1～1.995s-1之间的区域。同时,建立的TA15合金高温变形时的流动应力模型表征了变形温度、应变速率和变形程度对流动应力的影响,模型的计算精度较高。The isothermal compression of TA 15 alloy has been carried out at a Thermecmaster-Z simulator. The experimental results show that the peak stress and steady stress decrease greatly with increasing of deformation temperature and decreasing of strain rate, and that the deformation temperature will affect the threshold strain to transmit the steady deformation. According to the experimental results, the obtained processing map presents two unsteady zones of high temperature deformation of TA 15 alloy, including the zone above 1300 K of deformation temperature and 10.0 s^-1 of strain rate and another zone below 1200 K of deformation temperature and 0.006 s^-1- 1.995 s^-1 of strain rates. Meanwhile, the present constitutive equation represents the effect of deformation temperature, strain rate and strain on flow stress in high temperature deformation of TA15 alloy. The calculated results of flow stress are in good agreement with the experimental results in high temperature deformation of TA 15 alloy.

关 键 词：TA15合金 热模拟试验 流动应力模型 加工图 

分 类 号：TG301[金属学及工艺—金属压力加工]