Microstructure Evolution and Mechanical Properties of Rheo-Squeeze Cast Mg-9Al-1Zn Alloy by Experiments and Thermodynamic Calculation

• Published in: Metallurgical and materials transactions. A, Physical metallurgy and materials science Vol. 46; no. 5; pp. 2134 - 2142
• Main Authors: Guo, Hong-Min, Zhang, Shu-Guo, Yang, Xiang-Jie, Liu, Xu-Bo, Jin, Hua-Lan
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.05.2015; Springer Nature B.V
• Subjects: Alloy solidification; Alloys; Characterization and Evaluation of Materials; Chemistry and Materials Science; Evolution; Magnesium base alloys; Materials Science; Mathematical analysis; Mechanical properties; Metallic Materials; Metallurgy; Microstructure; Nanotechnology; Physical metallurgy; Semi-solid processing; Structural Materials; Surfaces and Interfaces; Thermodynamics; Thin Films; Casting Defect; Magnesium Alloy; Solidification Path; AZ91 Alloy; Squeeze Casting
• ISSN: 1073-5623; 1543-1940
• DOI: 10.1007/s11661-015-2813-8

Microstructure evolution and mechanical properties of Mg-9Al-1Zn alloy produced by rheo-squeeze casting (R-SQC) were investigated. It was revealed that R-SQC has produced high integrity castings with fine and uniform microstructure, diminished defects, and improved mechanical properties. The solid content in semi-solid slurry determined the grain size of α-Mg phase, the volume content, and distribution of β-Mg 17 Al 12 phase, and predominantly controlled the mechanical properties. A two-stage thermodynamic calculation procedure to analyze R-SQC has been developed, and the solidification path and phase formation of Mg-9Al-1Zn alloy in R-SQC were discussed deeply.