Preparation and Hot Deformation Behavior of Graphene/Aluminum-Lithium Matrix Composite

Hong Qihu; Yan Shaojiu; Chen Xiang; Li Xiuhui; Peng Sikan

doi:10.15980/j.tzzz.2020.07.024

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Preparation and Hot Deformation Behavior of Graphene/Aluminum-Lithium Matrix Composite
Vol. 40, Issue 7, Pages: 797-800(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.07.024

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[1]洪起虎,燕绍九,陈翔,李秀辉,彭思侃.石墨烯/Al-Li基复合材料的制备及其热变形行为[J].特种铸造及有色合金,2020,40(07):797-800.

Hong Qihu, Yan Shaojiu, Chen Xiang, et al. Preparation and Hot Deformation Behavior of Graphene/Aluminum-Lithium Matrix Composite. [J]. Special Casting & Nonferrous Alloys 40(7):797-800(2020)
[1]洪起虎,燕绍九,陈翔,李秀辉,彭思侃.石墨烯/Al-Li基复合材料的制备及其热变形行为[J].特种铸造及有色合金,2020,40(07):797-800. DOI： 10.15980/j.tzzz.2020.07.024.

Hong Qihu, Yan Shaojiu, Chen Xiang, et al. Preparation and Hot Deformation Behavior of Graphene/Aluminum-Lithium Matrix Composite. [J]. Special Casting & Nonferrous Alloys 40(7):797-800(2020) DOI： 10.15980/j.tzzz.2020.07.024.

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。

Abstract

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.