Effects of Heat Treatment on Microstructure and Properties of AZ91D Magnesium Alloy

Abstract:

The microstructure, hardness and corrosion resistance of AZ91D alloy were investigated under different solution treatments and artificial aging conditions.When ascast AZ91D alloy was heat treated at 415°C by solution treatmentfor 12 h and artificially aged at 200°C, the volume fraction of precipitates increased with the aging time up to 10 h.When ascast AZ91D alloy was treated at 430°C by solution treatment for 12 h and artificially aged at 200°C for 10h, the volume fraction of precipitates reached a peak value.The results of the corrosion test showed that a high corrosion resisting of the second phase precipitates was beneficial to improving the strength and hardness. Solution treatment at 445°C temperature for 12 h destroied the consecutiveness of β-Mg17Al12 phases.

• Periodical: Key Engineering Materials (Volumes 575-576)
• Pages: 410-413
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.575-576.410
• Online since: September 2013
• Authors: Ming Wu, Fang Long, Hao Ran Geng, Fang Yang
• Keywords: Aging, AZ91D Magnesium Alloy, Corrosion Resistance, Microstructure, Solid Solution

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