Transactions of Materials and Heat Treatment

Title：Influence of T6 heat treatment on mechanical properties and microstructure for 6061 aluminum alloy large cone-cylinder part

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ClassificationCode：TG312

year,vol(issue):pagenumber：2022,47(4):227-234

Abstract：

The influence of T6 heat treatment on the microstructure and mechanical properties of 6061 aluminum alloy components after forming was studied. Then, after different T6 heat treatments, the change laws of mechanical properties for components were studied by electron tensile test, and the influences of heat treatment temperature and time on the microstructure were analyzed by optical microscope, scanning electron microscope and X-ray diffractometer. The results show that there are β-Al5FeSi and Mg2Si phases in the solution-treated alloy, and the solution treatment temperature and time have a significant effect on the tensile properties and plasticity of alloy. With the increasing of the solution temperature and time, the tensile strength and plasticity are the best (211.62 MPa, 38.3%) in the solution treatment(560 ℃, 4 h). However, compared with the artificial aging holding time, the artificial aging temperature has a greater impact on the tensile properties and plasticity of alloy, the mechanical properties are the best under the artificial aging (170 ℃, 10 h), and the yield strength, tensile strength and elongation are 145.26, 363.30 MPa and 18.32%, respectively.

Funds：

国家自然科学基金资助项目（51775520）

作者简介：白雪智（1995-），男，硕士研究生 E-mail：baixuezhi0415@163.com 通信作者：李国俊（1969-），男，硕士，教授级高工 E-mail：liguojun@126.com

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