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Proceedings Paper

Effects of heat treatment process on microstructure and mechanical properties of Mg-5Zn-xEr alloys
Author(s): Shubo Li; Xianfeng Zhao; Ke Liu; Zhaohui Wang; Wenbo Du
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Paper Abstract

The effects of heat treatment on microstructures and mechanical properties of the Mg-5Zn-xEr alloys (x = 0.63, 1.25, 6.3 wt.%) have been investigated by using XRD, DSC, SEM and TEM. The investigation suggested that the kinds of the secondary phases had a great effect on microstructures and ageing responses of the alloys. It was found that the Mg-5Zn-0.63Er alloys which contained the secondary phase of I-phase exclusively displayed the optimal ageing responses at 175°C for 36 h when it had been solution treated at 480°C for 10 h. However, the Mg-5Zn-1.25Er alloy including both W-phase and I-phase exhibited its good ageing behaviors at 175°C for 10 h after solution treated 520°C for 10 h. Meanwhile, the Mg-5Zn-6.3Er alloy presented its preferable ageing responses at 175°C for 18 h after solution treated at 520°C for 10 h. The peak hardness was ascribed to the presence of the β'1 phase which precipitateed during aging process.

Paper Details

Date Published: 12 April 2012
PDF: 8 pages
Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 840938 (12 April 2012); doi: 10.1117/12.924055
Show Author Affiliations
Shubo Li, Beijing Univ. of Technology (China)
Xianfeng Zhao, Beijing Univ. of Technology (China)
Ke Liu, Beijing Univ. of Technology (China)
Zhaohui Wang, Beijing Univ. of Technology (China)
Wenbo Du, Beijing Univ. of Technology (China)

Published in SPIE Proceedings Vol. 8409:
Third International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Yoseph Bar-Cohen; In Lee; Jian Lu, Editor(s)

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