摘要
采用湿法球磨+热等静压烧结的方法制备了石墨烯含量为0.5%的Al-Li基复合材料,并对其在热压缩过程中的流变应力和变形组织进行了研究。结果表明,应力-应变曲线呈"应变软化"型,应变速率越高、变形温度越低,流动应力越大。基于Arrhenius方程计算获得了石墨烯/Al-Li基复合材料热变形激活能为222.15kJ/mol,建立了复合材料的热变形本构方程。
Graphene/aluminum-lithium matrix composites were prepared by wet milling and hot isostatic pressing process,and then the hot deformation behavior of graphene/aluminum-lithium matrix composites was investigated by Gleeble-3500 thermal simulation machine at deformation temperature in range of 400~430 ℃and strain rate in range of 0.001~10 s-1.The results reveal that stress-strain curves are presented as strain soften behavior,where with increasing in strain rate and decreasing in deformation temperature,the flow stress is increased.Based on the Arrhenius equation,the hot deformation activation energy Q was calculated as 222.15 kJ/mol,and the hot deformation constitutive equation was established.
作者
洪起虎
燕绍九
陈翔
李秀辉
彭思侃
Hong Qihu;Yan Shaojiu;Chen Xiang;Li Xiuhui;Peng Sikan(Research Center of Graphene Applications,Beijing Institute of Aeronautical Materials)
出处
《特种铸造及有色合金》
CAS
北大核心
2020年第7期797-800,共4页
Special Casting & Nonferrous Alloys
关键词
石墨烯/Al-Li基复合材料
热变形行为
流变应力方程
Graphene/Aluminum-Lithium Matrix Composite
Hot Deformation Behavior
Flow Stress Constitutive Equation
