Isothermal semi-solid treatment of GWZ magnesium alloy
Publish Year: 1397
Type: Conference paper
Language: English
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Document National Code:
IMES12_361
Index date: 1 May 2019
Isothermal semi-solid treatment of GWZ magnesium alloy abstract
GWZ alloy was isothermally heat treated in semi-solid mushy region. The experimental alloy was containing LPSO phase in blocky shape located at grain boundaries. The experimental material possessed an elongated non-dendritic as-extrude structure. The effects of holding time and temperature in the semi-solid region were evaluated on the microstructural evolution through applying predetermined isothermal heat treatment scheme. The results indicate that increasing the holding time would increase the liquid fraction, shape factor, and particle size. It is discussed that the particle spheroidization as well as Ostwald ripening mechanism are triggered at higher temperature. The incremental trends of particle size and shape factor are mitigated after mid-term holding time at 550 °C. This observation is attributed to isolating more discrete particles. lower coarsening rate of solid particles in the present work is related to the dragging effects of redistributed eutectic phase, LPSO phase and RE elements in hindering the boundary motion.
Isothermal semi-solid treatment of GWZ magnesium alloy Keywords:
Isothermal semi-solid treatment of GWZ magnesium alloy authors
Seyed Mehdi Ramezani
School of Metallurgy and Materials Engineering, College of Engineering, University of Terhan, Iran
Abbas Zarei Hanzaki
The complex of Hot Deformation Thermomechanical Processing Laboratory of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran
Mehdi Mosayebi
School of Metallurgy and Materials Engineering, College of Engineering, University of Terhan, Iran