Transactions of Materials and Heat Treatment

Title：Influence of equal channel angular pressing on mechanical properties and microstructure for pure aluminum formed by vacuum suction casting

Authors： Li Jian He Tao Jia Dongsheng Huo Yuanming Zhang Junjie Chen Xilin

Unit： Shanghai University of Engineering Science

KeyWords： vacuum suction casting equal channel angular pressing pure aluminum mechanical properties microstructure

ClassificationCode：TG376

year,vol(issue):pagenumber：2023,48(11):60-66

Abstract：

In order to explore the influences of equal channel angular pressing (ECAP) on the mechanical properties and microstructure of pure aluminum formed by vacuum suction casting, the mechanical properties and microstructure morphology of pure aluminum formed by vacuum suction casting before and after ECAP were studied by microhardness testing, room temperature tensile testing and optical microscope. The results show that after ECAP, the vacuum suction casting make the fine grain of pure aluminum continue to be elongated and refined. The average grain size is refined from 31 μm to 24 μm, and the grain refinement is more uniform. The hardness and tensile strength of pure aluminum formed by vacuum suction casting are 26.6 HV and 72.1 MPa respectively, and after ECAP strengthening, they reach 41.6 HV and 113.2 MPa, which are increased by 56.5% and 57.0% respectively. Moreover, the comprehensive mechanical properties are better.

Funds：

国家自然科学基金资助项目（52275350）；上海市自然科学基金资助项目（20ZR1422100）

作者简介：李健（1999-），男，硕士研究生，E-mail：1304036481@qq.com；通信作者：何涛（1979-），男，博士，教授，E-mail：hetao@sues.edu.cn

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