Synthesis and thermal stability of nanocrystalline Mg-۶Al-۱Zn-۱Si alloy prepared via mechanical alloying
Publish Year: 1394
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JMATPR-3-1_007
تاریخ نمایه سازی: 13 مهر 1400
Abstract:
Thermal stability and the kinetics of the grain growth of nano-crystalline Mg-۶Al-۱Zn-۱Si alloy prepared via mechanical alloying (MA) were investigated. It started with elemental powders, using a variety of analytical techniques including differential scanning calorimetry (DSC), X-ray diffraction method (XRD), and scanning electron microscopy (SEM) coupled with energy dispersive spectrometry (EDS). The results showed that MA-processed alloy was composed of an Mg-based supersaturated solid solution with small amounts of Al and MgAl۲O۴. Grain growth and Mg۲Si precipitation occurred upon annealing of the MA-processed Mg-based alloy. Nevertheless, grain growth in the MA-processed alloy was limited and α-Mg grains with sizes in the range of ۷۰ nm were still present after exposure to ۴۵۰ °C. The grain growth behavior of alloy can be described by the parabolic kinetic equation of grain growth. Higher strength values obtained after hot consolidation can be due to refined microstructure and the formation of Mg۲Si intermetallic phase.
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Authors
Roholamin Sedighi
Department of Material Science and Engineering, Faculty of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran
Mohammad Rajabi
Department of Material Science and Engineering, Faculty of Mechanical Engineering, Babol Noshirvani University of Technology
Seyed Mahmood Rabiee
Department of Material Science and Engineering, Faculty of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran
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