Indian Journal of Pure and Applied Physics

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Microstructure and Mechanical Properties of Magnesium-Aluminium (Mg-Al) Alloys with High Aluminium Content (Al =10, 15, 20 wt. %)


Affiliations
1 College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325 035, China
2 School of Mechanical Engineering, Shri Mata Vaishno Devi University, Kakryal, Katra, Jammu and Kashmir 182 320, India
3 Department of Mechanical Engineering, 9 Engineering Drive 1, National University of Singapore (NUS), Singapore 117 576, Singapore

Magnesium-Aluminium (Mg-Al) alloys containing zinc or manganese are preferred choice in automobile and aerospace sectors. Aluminium, the major strengthening element in Mg-alloys is always added below its solid solubility limit of 12.5 wt.%. In the current study, Mg-Al binary systems with Al-content just below and above the solubility limit (Al = 10, 15 and 20 wt.%,) were developed and examined for their microstructural and mechanical behaviour. Microstructural studies showed the importance of Al-content in determining: (i) grain size reduction and (ii) distribution and amount of inter metallic phase. Mechanical property evaluation showed that the hardness increase was linearly dependent on Al-content, with Mg-20Al showing > 250% increase in hardness than commercial AZ91alloy. Mg-10Al showed 215% and 130% increase in yield and ultimate strengths respectively, and exhibited the best properties in terms of work of fracture, which is representative of the alloy’s toughness.
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  • Microstructure and Mechanical Properties of Magnesium-Aluminium (Mg-Al) Alloys with High Aluminium Content (Al =10, 15, 20 wt. %)

Abstract Views: 152  | 

Authors

S Jayalakshmi
College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325 035, China
R Arvind Singh
College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325 035, China
Sanjay Mohan
School of Mechanical Engineering, Shri Mata Vaishno Devi University, Kakryal, Katra, Jammu and Kashmir 182 320, India
S Sankaranarayanan
Department of Mechanical Engineering, 9 Engineering Drive 1, National University of Singapore (NUS), Singapore 117 576, Singapore
Vasco Machemba Gomano
College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325 035, China
Xizhang Chen
College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325 035, China
Manoj Gupta
Department of Mechanical Engineering, 9 Engineering Drive 1, National University of Singapore (NUS), Singapore 117 576, Singapore

Abstract


Magnesium-Aluminium (Mg-Al) alloys containing zinc or manganese are preferred choice in automobile and aerospace sectors. Aluminium, the major strengthening element in Mg-alloys is always added below its solid solubility limit of 12.5 wt.%. In the current study, Mg-Al binary systems with Al-content just below and above the solubility limit (Al = 10, 15 and 20 wt.%,) were developed and examined for their microstructural and mechanical behaviour. Microstructural studies showed the importance of Al-content in determining: (i) grain size reduction and (ii) distribution and amount of inter metallic phase. Mechanical property evaluation showed that the hardness increase was linearly dependent on Al-content, with Mg-20Al showing > 250% increase in hardness than commercial AZ91alloy. Mg-10Al showed 215% and 130% increase in yield and ultimate strengths respectively, and exhibited the best properties in terms of work of fracture, which is representative of the alloy’s toughness.