摘要
对7075铝合金进行了多向锻造试验以及EBSD检测。基于热模拟试验获得的不同温度下的真应力-应变曲线建立流动应力Arrhenius双曲正弦本构方程模型,用Deform-3D软件对7075铝合金4道次多向锻造过程中锻件的温度场、等效应变、最大主应力进行数值模拟。结果表明,锻件最大晶粒尺寸为20.8μm,最小的晶粒尺寸为0.106μm,与多向锻造试验和EBSD检测所获得的大小晶粒共存的双峰晶粒尺寸结果相一致,说明了数值模拟的准确性。
The test of multi-directional forging(MF) and EBSD of 7075 aluminum alloy were carried out. Based on the true stress-strain curves at different temperatures obtained by thermal simulation test, the Arrhenius hyperbolic sinusoidal constitutive equation model was established. The Deform-3D software was used to simulate the temperature field, the equivalent strain and the maximum principal stress of 7075 aluminum alloy during the four passes of MF experiment. The results show that the maximum and the minimum grain size of the forgings is 20.8 and 0.106 μm, respectively. The results are consistent with the results of bimodal grain size obtained by MF experiment and EBSD testing, which shows the accuracy of numerical simulation.
作者
刘晓红
黄东英
张磊
颜春辉
LIU Xiaohong;HUANG Dongying;ZHANG Lei;YAN Chunhui(Guangxi Key Laboratory of Manufacturing System&Advanced Manufacturing Technology,School of Physical Education,Guangxi University,Nanning 530004,China;School of Mechanical Engineering,Guangxi University,Nanning 530004,China)
出处
《热加工工艺》
北大核心
2022年第5期76-79,共4页
Hot Working Technology
基金
国家自然科学基金项目(51561003)
广西制造系统与先进制造技术重点实验室基金项目(17-259-05S010)。
关键词
7075铝合金
多向锻造
数值模拟
双峰晶粒
7075 aluminum alloy
multi-directional forging
numerical simulation
bimodal grain size
