Effects of heat treatment process on microstructure and mechanical properties of Mg-5Zn-xEr alloys

Shubo Li; Xianfeng Zhao; Ke Liu; Zhaohui Wang; Wenbo Du

doi:10.1117/12.924055

12 April 2012 Effects of heat treatment process on microstructure and mechanical properties of Mg-5Zn-xEr alloys

Shubo Li, Xianfeng Zhao, Ke Liu, Zhaohui Wang, Wenbo Du

Proceedings Volume 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering; 840938 (2012) https://doi.org/10.1117/12.924055
Event: Third International Conference on Smart Materials and Nanotechnology in Engineering, 2011, Shenzhen, China

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.

Citation Download Citation

Shubo Li, Xianfeng Zhao, Ke Liu, Zhaohui Wang, and Wenbo Du "Effects of heat treatment process on microstructure and mechanical properties of Mg-5Zn-xEr alloys", Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 840938 (12 April 2012); https://doi.org/10.1117/12.924055

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