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http://dx.doi.org/10.12989/amr.2012.1.3.169

The tensile deformation and fracture behavior of a magnesium alloy nanocomposite reinforced with nickel  

Srivatsan, T.S. (Division of Materials Science and Engineering, Department of Mechanical Engineering, The University of Akron)
Manigandan, K. (Division of Materials Science and Engineering, Department of Mechanical Engineering, The University of Akron)
Godbole, C. (Division of Materials Science and Engineering, Department of Mechanical Engineering, The University of Akron)
Paramsothy, M. (Department of Mechanical Engineering, National University of Singapore)
Gupta, M. (Department of Mechanical Engineering, National University of Singapore)
Publication Information
Advances in materials Research / v.1, no.3, 2012 , pp. 169-182 More about this Journal
Abstract
In this paper the intrinsic influence of micron-sized nickel particle reinforcements on microstructure, micro-hardness tensile properties and tensile fracture behavior of nano-alumina particle reinforced magnesium alloy AZ31 composite is presented and discussed. The unreinforced magnesium alloy (AZ31) and the reinforced nanocomposite counterpart (AZ31/1.5 vol.% $Al_2O_3$/1.5 vol.% Ni] were manufactured by solidification processing followed by hot extrusion. The elastic modulus and yield strength of the nickel particle-reinforced magnesium alloy nano-composite was higher than both the unreinforced magnesium alloy and the unreinforced magnesium alloy nanocomposite (AZ31/1.5 vol.% $Al_2O_3$). The ultimate tensile strength of the nickel particle reinforced composite was noticeably lower than both the unreinforced nano-composite and the monolithic alloy (AZ31). The ductility, quantified by elongation-to-failure, of the reinforced nanocomposite was noticeably higher than both the unreinforced nano-composite and the monolithic alloy. Tensile fracture behavior of this novel material was essentially normal to the far-field stress axis and revealed microscopic features reminiscent of the occurrence of locally ductile failure mechanisms at the fine microscopic level.
Keywords
magnesium alloy; reinforcements; aluminum oxide and nickel particles; metal-matrix composite; microstructure; microhardness; tensile properties; tensile fracture; mechanisms;
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