Affiliation:
1. Faculty of Material Science and Engineering Kunming University of Science and Technology Kunming 650093 P. R. China
Abstract
In this study, the homogenization heat‐treatment process and microstructural evolution of 4047 aluminum alloy are investigated. In the results, it is revealed that the homogenization process induces partial dissolution of metastable phases and modification of the fine needle‐shaped eutectic Si. Within the 4047 aluminum alloy, the fine needle‐shaped eutectic Si undergoes granulation, involving two stages: crystal dissolution and granulation of broken crystals. After optimal homogenization heat treatment, the eutectic Si phase transformed from a fine needle‐shaped structure to small, regular spherical structures, reducing stress concentration and improving the interfacial bonding capability and internal structure of the alloy matrix. This significantly reduces the likelihood of microcrack formation within the alloy and effectively hinders crack propagation, enhancing the alloy's mechanical properties.
Funder
Ten Thousand Talent Plans for Young Top-notch Talents of Yunnan Province
Yunnan Key Research and Development Program
Analysis and Testing Foundation of Kunming University of Science and Technology