Microstructures and mechanical properties of Mg-10Ho-0.6Zr-xNd alloys

刘宝忠; 刘娇娇; 侯秀丽; 张志; 李雷; 王立民

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Microstructures and mechanical properties of Mg-10Ho-0.6Zr-xNd alloys

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Mg-10Ho-0.6Zr-xNd （x=0, 1, 3 and 5, mass fraction, %） alloys were prepared by metal mould casting, and the microstructures and mechanical properties were investigated. The results show that the grain size of as-cast alloys reduces and the hardness and strength increase with the increase of Nd content. The alloys are aged followed by solid solution treatment. Mg-10Ho-0.6Zr-3Nd and Mg-10Ho-0.6Zr-5Nd alloys exhibit obvious age hardening response. The hardness value of Mg-10Ho-0.6Zr-5Nd alloy increases from HV104 at as-cast state to HV136 at peak-aged state. The maximum ultimate tensile strength and yield strength of the Mg-10Ho-0.6Zr-5Nd alloy are obtained in at peak-aged state, and the values are 323 MPa, 212 MPa at room temperature, and 258 MPa, 176 MPa at 250 ℃, respectively. The improvement of the tensile strength is mainly attributed to the fine and dispersively distributed plate-shaped β′ metastable phase.

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《中国有色金属学报：英文版》 |2010年第s2期|346-351|共6页
作者
刘宝忠; 刘娇娇; 侯秀丽; 张志; 李雷; 王立民;
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作者单位

1. School of Materials Science and Engineering;

Henan Polytechnic University 2. Key Laboratory of Automobile Materials;

Ministry of Education;

Jilin University 3. State Key Laboratory of Rare Earth Resource Utilization;

Changchun Institute of Applied Che;

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正文语种 chi
中图分类 TG146.22;
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Microstructures and mechanical properties of Mg-10Ho-0.6Zr-xNd alloys

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