Microstructural Evolution of SiCp/AZ61 Composites during Partial Remelting

Yan, Hong; Zhang, Fa Yun; Pan, Wei

doi:10.4028/www.scientific.net/ssp.141-143.545

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…At present, this method focus on the study of non-dendritic alloy preparation and its mechanism of evolution [4,5]. Its application in the field of composite is few, and especially achievement of relevant researches on magnesium matrix composite is extreme rare [6,7] .…”

Section: Introductionmentioning

confidence: 99%

Effects of SiC Particle and Holding Time on Semi-Solid Microstructure of SiC<sub>P</sub>/AZ61 Composites

Zhang

Yan

2010

AMR

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Effects of SiC particle and holding time on microstructure evolution of SiCP/AZ61 composites during semi-solid isothermal heat treatment method were studied, and evolution mechanism of semi-solid microstructure of composites was discussed. The results indicated that the process of microstructure evolution of SiCP/AZ61 composites by the isothermal holding at the temperatures of 595°C for different times (0min~90min) experienced in succession the rapid merging of the secondary dendritic arms →large massive structure→melting and separating of the local grain boundary →spheroidization of the gains →slowing growth of globular microstructure. Synthetically, after isothermal holding at 595°C for 30min to 60min the favorable semi-solid microstructure can be obtained; Compared with the monolithic AZ61alloy, microstructure of SiCP/AZ61 composites during semi-solid isothermal heat-treatment was finer as a result of entering of Sic particle, and with the increasing of SiC particle volume fraction, globular gain size was smaller.

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