1. Grain refinement of AZ91D magnesium alloy by a new Mg–50%Al4C3 master alloy.
- Author
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Liu, Shengfa, Chen, Yang, and Han, Hui
- Subjects
- *
ALUMINUM-magnesium alloys , *X-ray diffraction , *ENERGY dispersive X-ray spectroscopy , *SCANNING electron microscopes , *METAL powders , *PARTICLE analysis - Abstract
A novel and simple method for preparing Mg–50%Al 4 C 3 (hereafter in wt.%) master alloy has been developed by powder in-situ synthesis process under argon atmosphere. X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS) results show the existence of Al 4 C 3 particles in this master alloy. After adding 1.8% Mg–50%Al 4 C 3 master alloy, the average grain size of α-Mg decreased from 360 μm to 154 μm. Based on the DTA test results and calculation of the planar disregistry between Al 4 C 3 and α-Mg, Al 4 C 3 particles located in the central regions of magnesium grains can act as the heterogeneous nucleus of primary α-Mg phase. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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