摘要
通过等温热压缩实验研究Inconel 625合金的高温高速热变形行为,获得了合金在温度为1000～1200℃、应变速率为1～80 s-1的条件下的真应力-应变曲线,并在考虑变形热效应的基础上对真应力-应变曲线进行了修正。对修正后的峰值应力进行线性回归,得到材料的材料常数:Q=442.97 kJ/mol,n=4.49,α=0.0029 MPa-1。通过非线性回归建立了Inconel 625合金在高温高速条件下的本构模型。
Hot compression tests were conducted to investigate the high-temperature and high-speed hot deformation behavior of Inconel 625 superalloy.The true stress-true strain curves were obtained at 1000-1200 ℃ and the strain rate of 1-80 s-1.The curves were corrected in consideration of deformation heat effect.The material constants,Q of 442.97 kJ/mol,n of 4.49 and α of 0.0029 MPa-1,are obtained by linear regression of the peak stress.The constitutive model of Inconel 625 alloy at high temperature and high speed is established by non-linear regression method.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2012年第9期55-59,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金和宝山钢铁股份有限公司联合资助项目(50834008)
关键词
INCONEL
625合金
高温高速
热变形
温度修正
本构模型
Inconel 625 alloy
high temperature and high speed
hot deformation
temperature correction
constitutive model
作者简介
陶琳（1986-），女，研究方向为高温合金管材热挤压，电话：024-83970203，Email：ltao@imr．ae．cn。
通讯作者：张士宏，男，研究员，E-mail：shzhang@imr．ac．cn。
