Material Mechanical Properties and Microstructure of Magnesium Alloy Matrix Composites Fabricated by Casting Process

Sasaki, Gen

doi:10.4028/www.scientific.net/msf.426-432.2015

Cited by 1 publication

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“…A few publications deal with the microstructure of SiC particle reinforced AZ91D SSM. According to Sasaki et al 12,13 who produced SiC particle reinforced AZ91D by means of SSM casting, known by the commercial name of 'compocasting', the microstructure is characterised by a bimodal grain size distribution. They emphasised the advantages of using the SSM process to obtain a uniform distribution of the reinforcing particles.…”

Section: Introductionmentioning

confidence: 99%

Microstructure study of particle reinforced AZ91D and AM50 magnesium alloy semisolid casting

Regev¹,

Rosenson²,

Koren³

2007

Materials Science and Technology

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Semisolid metal (SSM) casting offers a number of advantages compared to other casting processes such as reducing cast defects, eliminating dendritic morphology and improving microstructural uniformity. The high shear rate and turbulence involved in the SSM process can contribute to achieving a uniform distribution of the reinforcing phase when producing metal matrix composites (MMCs). Microstructure investigation of SiC particles reinforced AZ91D and AM50 produced by SSM was conducted by means of optical microscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy chemical analysis. Correlation between the process parameters and the microstructure was found. Microstructure stability was studied by performing aging experiments at 180uC, and the microstructure was found to be unstable, namely precipitation of secondary b (Mg 17 Al 12 ) phase was detected. The instability of the microstructure can be explained on the basis of the solidification process.

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Section: Introductionmentioning

confidence: 99%