Enhanced corrosion resistance of AZ91D magnesium alloy through refined and homogeneous microstructure by rapid solidification and hot extrusion technique
Year: 2025
Type: article
Abstract: Achieving both high corrosion resistance and strength simultaneously has always been a long-standing goal for lightweight structural materials. In this study, we prepared an AZ91D magnesium alloy with a refined and homogeneous microstructure by rapid solidification hot extrusion technique. The corrosion behavior of AZ91D magnesium alloy in as-cast (AC), heat-treated (HT), heat-treated and hot-extruded (HT-HE), and rapidly solidified and hot-extruded (RS-HE) states were investigated through weight loss, hydrogen evolution, and electrochemical experiments. The structure-property relationships between the microstructure and macroscopic corrosion behavior of AZ91D magnesium alloy under various processing conditions were elucidated by combining corrosion kinetics and mechanisms. The results demonstrate that Rapid solidification and hot extrusion technique significantly enhances the corrosion resistance of AZ91D magnesium alloy through grain refinement, uniform second-phase dispersion, and extended solid solubility. Furthermore, this study reveals that Rapid solidification and hot extrusion technique markedly improved the mechanical properties of as-cast AZ91D magnesium alloy (UTS=392.1 MPa, EL=14.8%).
Source: Materials & Design
Authors: Jianwei Li, Jiarun Kou, Chao Yang, Hangmai Qi, Wenfeng Gao, Shijia Mu, Yungui Chen
Institutions: Sichuan University, Southwest Jiaotong University
Language: English
Subfield: Biomaterials
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,650
OpenAlex ID: W4414158093