Effect of specific pressure on microstructure and mechanical properties of squeeze casting ZA27 alloy

• Published in: Transactions of Nonferrous Metals Society of China Vol. 20; no. 1; pp. 59 - 63
• Main Author: 李润霞 李荣德 白彦华 曲迎东 袁晓光
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2010; School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110178, China
• Subjects: Alloying elements; Eutectic reactions; Mechanical properties; Microstructure; Phases; Plasticity; specific pressure; Squeeze casting; ZA27 alloy; ZA27合金; Zinc base alloys; 凝固结构; 力学性能; 均匀分布; 微观结构; 挤压铸造; specific pressure; squeeze casting; ZA27 alloy
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(09)60097-2

The effect of specific pressure on the microstructure and mechanical properties of ZA27 squeezed castings with high height-to-thickness ratio was studied. The results of DTA and SEM show that at high specific pressure the eutectie reaction of squeeze casting ZA27 alloy is restrained, and the final solidified structure is （η＋ε） phases instead of eutectie phase （η＋ε）. At the same time, the primary reaction is promoted in squeeze casting ZA27 alloy solidified at high pressure, and the fine microstructure is obtained with the increase of pressure. A1 and Cu elements are homogeneously distributed in matrix of squeeze casting ZA27 alloy. The homogenously distributed high-density fine e phase can effectively hinder dislocation motion, and then the strength and plasticity of squeeze casting ZA27 alloy are increased.