Studies of Microstructures and Properties of AZ91D Alloy Based on the Rheoforming Process

Xiao Ping Zheng; Ze Sheng Ji; Wei Wen Zhang; Ming Shao

doi:10.4028/www.scientific.net/AMM.713-715.2876

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Studies of Microstructures and Properties of AZ91D Alloy Based on the Rheoforming Process
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 713-715Studies of Microstructures and Properties of AZ91D...

Studies of Microstructures and Properties of AZ91D Alloy Based on the Rheoforming Process

Abstract:

The semi-solid rheoforming process of AZ91D alloy with 9 % plastic deformation was investigated. The effect of holding time on the rheoforming formability of AZ91D alloy was analyzed. The relationship between holding time and microstructure, mechanical property was also researched. The results show that with increasing of holding time from 0 to 60 min at 575 °C, the filling distance increases firstly and then decreases, the solid fraction decreases firstly and then increases, the tensile strength and elongation are also increase firstly and then decrease. However, the increasing of holding time would lead to shape factor decreasing but particle coarsening. When holding time is 30 min, the solid fraction is lowest and the filling distance increases greatly. Compared to the conventional casting sample, the tensile strength and elongation of the rheoforming parts increase 43.9 % and 187.5 %, respectively.