Characterization of Nanonanocrystalline Mg-6Al-1Zn-1Si Alloy Powder During Mechanical Alloying and Subsequent Annealing

Rajabi, M.; Sedighi, R. A.; Rabiee, S. M.

doi:10.18869/acadpub.jame.34.2.103

Characterization of Nanonanocrystalline Mg-6Al-1Zn-1Si Alloy Powder During Mechanical Alloying and Subsequent Annealing

Authors

M. Rajabi

R. A. Sedighi

S. M. Rabiee

Noshirvani University of Technology, Babol, Iran

10.18869/acadpub.jame.34.2.103

Abstract

In this study, the effect of mechanical alloying on the microstructure and phase constituents of Mg-6Al-1Zn-1Si system was investigated. To understand the thermal behavior, isothermal annealing was performed at three different temperatures of 350, 400 and 450 °C for 1h. The results showed the grain size initially decreases with increasing the milling time up to 35h and then slightly increases. In contrast, the lattice strain increases sharply with increasing the milling time up to 35h and then decreases. Second-phase intermetallic particle Mg2Si was produced during annealing and the amount of this phase was increased with increasing annealing temperature. The mechanical alloying process decreased the formation temperature of Mg2Si.

Keywords

mechanical alloying

Magnesium alloys

intermetallic compound

Isothermal annealing