Hot deformation behavior and processing map of AZ61/SiC composites

Murugan Subramani, Yu Chih Tzeng, Li Wei Tseng, Ying Kuan Tsai, Gunng Shinng Chen, Chen Yuan Chung, Song Jeng Huang

研究成果: 雜誌貢獻期刊論文同行評審

17 引文 斯高帕斯(Scopus)


The hot deformation behavior of as-cast AZ61/SiC composites during uniaxial compression test at temperatures ranging from 280 to 440 ℃ and a strain rate of 0.001–1 s−1 was investigated. There was an increase in the flow stress of the composites with a decrease int the temperature and increase in the strain rate. Processing maps were developed based on the dynamic material model (DMM) at a maximum strain of 1.2. The effects of the incorporation of silicon carbide (SiC) particles into the base alloy are discussed. The findings show that the incorporation of SiC particles into the base alloy effectively enhanced its workability in the low temperature domain. The SiC particles promoted the generation and reduced the mobility of dislocations, effectively meeting the energy requirements for dynamic recrystallization (DRX) needed to improve low temperature workability. The optimal processing workability conditions for a AZ61/SiC composite with a higher dissipation efficiency of (PDE) of 39.5% were determined to be 440⁰C/0.001 s−1. The instability domain did not exist in the composite because the material could be deformed without micro cracks or flow visualization. The activation energy was calculated to be 131.5 kJ/mol using a constructive model of the composite.

期刊Materials Today Communications
出版狀態已出版 - 12月 2021


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