Microstructure and Mechanical Properties of Mg-12Gd-2Y-Sm-0.5Zr Alloy

Ke Jie Li; Qua Nan Li

doi:10.4028/www.scientific.net/AMR.168-170.1001

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 168-170Microstructure and Mechanical Properties of...

Microstructure and Mechanical Properties of Mg-12Gd-2Y-Sm-0.5Zr Alloy

Abstract:

The Mg-12Gd-2Y-Sm-0.5Zr (wt. %) alloy was prepared by casting technology and the microstructure and mechanical properties of the alloy have been investigated. It was found that the alloy was composed of a-Mg matrix, Mg5Gd phase and dispersed long-period ordered β' precipitates. With temperature increasing from 20 to 300 °C, the tensile strength increased and reached to the maximum strength at 300°C, namely 316.3 MPa. The value was superior to those of the conventional heat-resistant magnesium. The improved strain hardening and critical crack propagation stress were the key factors for experimental alloy possessed anomalous temperature dependence of tensile strength.

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Advanced Materials Research (Volumes 168-170)

Pages:

1001-1005

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.168-170.1001

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Online since:

December 2010

Authors:

Ke Jie Li, Qua Nan Li

Keywords:

Long-Period Ordered (LPO) Phase, Mg–12Gd–2Y-Sm–0.5Zr Alloy, Precipitation Hardening, Tensile Strength

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