Effect of Ca and Nd Alloying on the Microstructure of Mg-6Al-Ca-Nd Alloy

Abstract:

The Mg-6Al-xCa-xNd alloys, which were alloyed by Ca and Nd element on basis of Mg-6Al alloy, were fabricated by gravity permanent mould method. The microstructure and mechanical property were characterized by scanning electron microscope (SEM) and X-ray diffractometer (XRD). Experimental results show that the microstructure of as-cast Mg-6Al alloy is with typical dendritic morphology, which is consist of α-Mg matrix and divorced eutectic β-Mg₁₇Al₁₂ phase along the grain boundaries. With increasing of Ca and Nd elements content, the α-Mg grains of Mg-6Al-Ca-Nd alloy were refined obviously, and the dendritic structure disappeared and equiaxed grains appeared. Meanwhile, β-Mg₁₇Al₁₂ phase decreased until disappeared and intermetallic Al-Ca phases and Al-Nd phases increased.

• Periodical: Advanced Materials Research (Volume 1095)
• Pages: 91-94
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1095.91
• Online since: March 2015
• Authors: Yi Cheng Feng, Qin Wang, Si Cong Zhao, Wen Yong Jiang, Li Ping Wang, Er Jun Guo
• Keywords: Alloying, Mechanical Properties, Mg-Al-Ca-Nd Quaternary Alloy, Microstructure

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