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• Tun, K
• Minh, N
• Nguyen, Q
• Hamouda, A
• Gupta, M
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• Tun, K
• Minh, N
• Nguyen, Q
• Hamouda, A
• Gupta, M
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• Tun, K
• Minh, N
• Nguyen, Q
• Hamouda, A
• Gupta, M

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Metals 2012, 2(3), 313-328; doi:10.3390/met2030313

Article

Investigation on the Mechanical Properties of Mg-Al Alloys (AZ41 and AZ51) and Its Composites

Khin S. Tun ^1,* , Ng J. Minh ¹ , Quy B. Nguyen ¹ , Abdel Magid Hamouda ²  and Manoj Gupta ¹

¹ Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore ² Department of Mechanical and Industrial Engineering, College of Engineering, Qatar University, Doha 2713, Qatar

* Author to whom correspondence should be addressed.

Received: 28 May 2012; in revised form: 10 July 2012 / Accepted: 17 August 2012 / Published: 29 August 2012

(This article belongs to the Special Issue Magnesium Technology)

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Abstract: In the present study, AZ41 and AZ51 alloys were fabricated using disintegrated melt deposition technique followed by hot extrusion. AZ41/Yttria and AZ51/Yttria composites were prepared using 0.6 wt% yttria nano particles in the alloys using the same fabrication technique. From the tensile test results, both strengths (yield and tensile) and ductility were improved in AZ51 when compared to AZ41. In comparison with its alloy counterparts, the yield and tensile strengths were enhanced while maintaining the same ductility in AZ41/Yttria composite, but comparable strengths with decreased ductility were observed in AZ51/Yttria composite. Under compressive loading, an improvement in strengths with similar ductility was observed in AZ51 when compared to AZ41. The best combination of strengths and ductility was observed in AZ51/Yttria composites from compression test results. The obtained mechanical properties are correlated with the microstructure observations.

Keywords: AZ31 magnesium alloy; yttria; microstructure; tensile; compression

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