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Title: Mechanical behavior of a magnesium alloy nanocomposite under conditions of static tension and dynamic fatigue
Authors: Srivatsan, T.S.
Godbole, C.
Quick, T.
Paramsothy, M. 
Gupta, M. 
Keywords: aluminum oxide
cyclic fatigue life
magnesium alloy
metal-matrix composite
particulate reinforcement
tensile response
Issue Date: 2013
Citation: Srivatsan, T.S., Godbole, C., Quick, T., Paramsothy, M., Gupta, M. (2013). Mechanical behavior of a magnesium alloy nanocomposite under conditions of static tension and dynamic fatigue. Journal of Materials Engineering and Performance 22 (2) : 439-453. ScholarBank@NUS Repository.
Abstract: In this paper, the intrinsic influence of nano-alumina particulate (Al 2O3p) reinforcements on microstructure, microhardness, tensile properties, tensile fracture, cyclic stress-controlled fatigue, and final fracture behavior of a magnesium alloy is presented and discussed. The unreinforced magnesium alloy (AZ31) and the reinforced composite counterpart (AZ31/1.5 vol.% Al2O3) were manufactured by solidification processing followed by hot extrusion. The elastic modulus, yield strength, and tensile strength of the nanoparticle-reinforced magnesium alloy were noticeably higher than the unreinforced counterpart. The ductility, quantified by elongation-to-failure, of the composite was observably lower than the unreinforced monolithic counterpart (AZ31). The nanoparticle-reinforced composite revealed improved cyclic fatigue resistance over the entire range of maximum stress at both the tested load ratios. Under conditions of fully reversed loading (R = -1) both materials showed observable degradation in behavior quantified in terms of cyclic fatigue life. The conjoint influence of reinforcement, processing, intrinsic microstructural features and loading condition on final fracture behavior is presented and discussed. © 2012 ASM International.
Source Title: Journal of Materials Engineering and Performance
ISSN: 10599495
DOI: 10.1007/s11665-012-0276-2
Appears in Collections:Staff Publications

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