有色金属材料与工程2023，Vol.44Issue(6)：52-60,9.DOI:10.13258/j.cnki.nmme.2023.06.006
铜/石墨复合材料热变形行为研究
Hot deformation behavior of copper/graphite composites
摘要
Abstract
The hot compression test of copper/graphite composites was conducted using a thermal simulation testing machine,Gleeble-3500,to study the thermal deformation behavior of the composites at a deformation temperature of 700-850℃ and a strain rate of 0.001-1.000 s-1.According to the experimental data,the constitutive equation and thermal processing map of the composites were constructed,and the microstructure evolution of the composites was studied by optical microscope.The rheological stress of the composites was studied according to Zener-Hollomon parameter model.The flow stress of the composites decreases with the increase of strain temperature and increases with the increase of strain rate.The calculated thermal deformation activation energy of the composites is 463.02 kJ/mol,which shows that the composites has good formability.The consistency of the maximum stress was verified through the constructed constitutive equation,and it was found that the error between the calculated and experimental values was within 9.5%,indicating that the equation has a guiding role in the rheological behavior of composites materials.The thermal processing map shows that the suitable working temperature is 780-820 ℃ and the deformation rate is around 0.050-0.100 s-1,when the deformation temperature is 830-850℃,the deformation rate is about 0.001s-1.关键词
铜/石墨复合材料/热压缩/微观组织/本构方程/热加工图Key words
copper/graphite composites/thermal compression/microstructure/constitutive equation/thermal processing map引用本文复制引用
蒋锦涛,刘平,陈小红,周洪雷..铜/石墨复合材料热变形行为研究[J].有色金属材料与工程,2023,44(6):52-60,9.基金项目
国家自然科学基金资助项目(51201107) （51201107）
