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Advances in Materials Science and Engineering
Volume 2014 (2014), Article ID 975041, 5 pages
http://dx.doi.org/10.1155/2014/975041
Research Article

Influence of Sc on Microstructure and Mechanical Properties of High Zn-Containing Mg Alloy

1Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130025, China
2State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Received 1 September 2014; Revised 28 November 2014; Accepted 2 December 2014; Published 18 December 2014

Academic Editor: Jie Dai

Copyright © 2014 Lidong Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Microstructures and mechanical properties of Mg-11Zn and Mg-11Zn-1Sc (wt%) alloys were investigated. The main secondary phase of Mg-11Zn and Mg-11Zn-1Sc alloys is MgZn2 phase. Rare earth Sc element is an effective grain refiner and the grain size of Mg-11Zn-1Sc alloy is greatly refined. The mechanical properties of the Mg-11Zn alloy were greatly improved with incorporation of 1 wt% Sc, especially for the elevated temperature strength. Such mechanical property enhancement is ascribed to the refinement and pinning mechanism of high heat-resistant Sc and Sc-containing intermetallic particles in Mg alloy.