Journal Article

Effect of Extrusion Temperature on the Microstructure and Mechanical Properties of Mg–5Al–2Ca Alloy

Kun Su Kun-kun Deng Fang-jun Xu Kai-bo Nie Li Zhang Xiao Zhang Wei-jian Li

2015

Overview

In this work, the Mg–5Al–2Ca alloy was extruded at 573, 623 and 673 K, with a ratio of 16：1 and a constant speed of 3 mm/s. Results demonstrate that the Al2Ca particle is formed in Mg–5Al–2Ca alloy. The size, amount and distribution of Al2Ca particles are influenced evidently by extrusion temperature. Unlike previous reports, the intensity of basal texture increases with increasing extrusion temperature, and the reasons are analyzed and given. Even though the average grain size increases as the extrusion temperature increased from 573 to 623 K, the YS, UTS and elongation of asextruded Mg–5Al–2Ca alloy are almost kept the same at 573 and 623 K. The reason is speculated as the balance of grain size, Al2Ca phase and texture at the two temperatures. The work hardening rate depends on extrusion temperature, and the largest θ value of Mg–5Al–2Ca alloy is obtained when the extrusion was performed at 623 K.

• Publisher: The Chinese Society for Metals,Springer Nature B.V
• Subject: Al合金 / Characterization and Evaluation of Materials / Chemistry and Materials Science / Corrosion and Coatings / Corrosion resistance / Deformation / Elongation / Extrusion / Extrusion rate / Grain boundaries / Grain size / Hardening rate / Magnesium base alloys / Materials Science / Mechanical properties / Metallic Materials / Microstructure / Nanotechnology / Organometallic Chemistry / Scanning electron microscopy / Spectroscopy/Spectrometry / Stainless steel / Surface layer / Temperature / Texture / Tribology / Work hardening / Yield strength / 加工硬化率 / 合金颗粒 / 平均晶粒尺寸 / 挤压温度 / 组织性能 / 速度表 / 镁