Research on microstructures of sub-rapidly solidified AZ61 Magnesium Alloy
- Key Laboratory for Materials Modification by Laser, Ion and Electron Beams, Ministry of Education (China)
- Department of Materials Engineering, University of British Columbia, Vancouver (Canada)
AZ61 magnesium alloy foils of 0.5-3.0 mm thick were successfully produced by using sub-rapid solidification technique. Microstructures of conventionally solidified (CS) and sub-rapidly solidified (sub-RS) alloys were examined by optical microscope (OM) and scanning electron microscope (SEM). The results showed that the cellular grain of 1.8-13.5 {mu}m can be obtained during sub-rapid solidification process. Phase compositions and microdistribution of the alloying elements in the foils were analyzed by X-ray diffraction (XRD) and electron probe microanalyzer (EPMA), respectively. The eutectic transformation L {yields} {alpha}-Mg + {beta}-Mg{sub 17}Al{sub 12} and microsegregation in conventionally solidified AZ61 alloy were remarkably suppressed in sub-rapid solidification process. As a consequence, the alloying elements Al, Zn, Mn showed much higher solid solubility and the sub-rapid solidification microstructures dominantly consisted of supersaturated {alpha}-Mg solid solution. Meanwhile, the {beta}-Mg{sub 17}Al{sub 12} phases located in the {alpha}-Mg grain boundaries are largely decreased due to high solidification cooling rate.
- OSTI ID:
- 22066096
- Journal Information:
- Materials Characterization, Journal Name: Materials Characterization Journal Issue: 6 Vol. 60; ISSN 1044-5803; ISSN MACHEX
- Country of Publication:
- United States
- Language:
- English
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