Microstructure and Properties of Mg-Al-Ca-Mn Alloy with High Ca/Al Ratio Fabricated by Hot Extrusion

Materials

Rafi ud-din¹  Yuping Zhao²  Aimin Chu³  Hairong Hu³  Qian Zhi³  Zerui Wang³ 

[1] Materials Division, PINSTECH, Post Office Nilore, Islamabad 44000, Pakistan;School of Civil and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;

关键词: Mg alloys;    high Ca/Al ratio;    mechanical properties;    hot extrusion;   

DOI  :  10.3390/ma14185230

来源: DOAJ

【 摘 要 】

Mg-Al-Ca-Mn alloys with Ca/Al ≥ 1 of AX33, AX44, and AX55 were prepared by combining three processes of water-cooling semi-continuous cast, homogenization heat treatment, and hot extrusion. The as-fabricated alloys translated into composites consisting of α-Mg solid solution + granular Al₂Ca. These alloys exhibited some favourable properties such as a tensile strength of 324~350 MPa at room temperature and 187~210 MPa at elevated temperature of 423 K, an ignition temperature of 1292~1344 K, and so on. Variation trend between performance and content of Al and Ca is given in this paper. The result indicated that the emerged second-phase Al₂Ca in the alloys was beneficial to the improvement in mechanical properties, heat resistance, flame retardation, and corrosion resistance.

【 授权许可】

Unknown