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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 3    June 2005

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Structure evolution of AZ61 magnesium alloy in SIMA process
YAN Hong(闫 洪),  ZHANG Fa-yun(张发云),  JIE Xiao-ping(揭小平)

School of Mechanical-Electrical Engineering, Nanchang University, 
Nanchang 330029, China

Abstract:The effect of prior compressive deformation, isothermal temperature and holding time on the structure of AZ61 magnesium alloy fabricated by strain-induced melt activation(SIMA) processing was investigated. The specimens were subjected under deformation ratios of 0%, 22% and 40% and various heat treatment time and temperature regions. The results indicate that the ideal technological parameters of semi-solid AZ61 alloy produced with non-dendrites are recommended as 22%(prior compressive deformation), 595℃(heat treatment temperature) and 40 min(time). The as-cast AZ61 magnesium alloy isn′t fit for semi-solid forming.

 

Key words: strain-induced melt activation(SIMA); AZ61 magnesium alloy; non-dendrites microstructure

ISSN 1672-7029
CN 43-1423/U

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