摘要
采用Gleeble-3800热模拟试验机热模拟压缩试验研究了GH2150合金在不同试验参数下的热变形行为和再结晶演变规律。结果表明,在1000~1200℃范围内,应变速率为0.1~5 s^(-1),变形量分别为30%、50%、70%条件下,合金峰值应力随变形温度升高而降低,随应变速率降低而降低。结合真应力-真应变曲线及阿伦尼乌斯公式得到了GH2150合金的热变形本构方程,采用该方程得到的计算结果与实际结果的平均相对误差为4.36%,相关系数R=0.992,具有较好的吻合性。绘制GH2150合金动态再结晶图发现大变形量有利于提高再结晶分数,合金再结晶行为在50%变形量下主要受变形温度影响,在70%变形量下采用低应变速率更有利于再结晶发生。
Hot deformation behavior and dynamic recrystallization evolution of GH2150 alloy under different test parameters were studied by hot compression test with Gleeble-3800 thermal simulation machine.The results show that in the range of 1000-1200℃,when the strain rate is 0.1-5 s^(-1)and the deformation amount is 30%,50%and 70%,respectively,the peak stress of the alloy decreases with the increase of deformation temperature and decrease of strain rate.Combined with the true stress-true strain curves and Arrhenius formula,the hot deformation constitutive equation of the GH2150 alloy is obtained.The average relative error between the calculated and the actual results is 4.36%,and the correlation coefficient is R=0.992,showing in good agreement.It is found by drawing dynamic recrystallization diagram that large deformation is beneficial to increase the recrystallization fraction of the GH2150 alloy.The dynamic recrystallization behavior is mainly affected by deformation temperature at 50%deformation,and low strain rate at 70%deformation is more beneficial to the recrystallization.
作者
娄号南
刘家奥
梅飞强
曹一超
宋玺玉
张伟红
Lou Haonan;Liu Jiaao;Mei Feiqiang;Cao Yichao;Song Xiyu;Zhang Weihong(Technique Center,Shenyang Liming Aero-Engine Co.,Ltd.,AECC,Shenyang Liaoning 110043,China;Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang Liaoning 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Hefei Anhui 230026,China;Shenyang Area 2nd Military Representative Room of Air Force Equipment Department,Shenyang Liaoning 110043,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2023年第6期167-172,共6页
Heat Treatment of Metals
作者简介
娄号南(1993-),男,工程师,博士,主要研究方向为航空发动机用金属材料应用技术,E-mail:lhaonan202303@163.com;通信作者:张伟红,副研究员,博士,E-mail:whzhang@imr.ac.cn。
