Effect of Nd Content and Heat Treatment on Microstructure and Mechanical Properties of Mg-Zn-Nd Alloy

Abstract:

In this paper, the microstructure and mechanical properties of the as-cast and heat treatment of Mg-Zn-Nd alloy was investigated. The alloy was manufactured by a conventional casting method, and then subjected to a heat treatment. The results showed that the microstructure of as-cast alloy was comprised of α-Mg matrix and Mg₁₂Nd phase. With increase of Nd content, the grain size gradually decreased from 25.38 μm to 9.82 μm. The ultimate tensile strength and elongation at room temperature of the Mg₉₄Zn₂Nd₄ alloy can be reached to 219.63 MPa and 5.31%. After heat treatment, part of the second phase dissolved into the magnesium matrix and the grain size became a little larger than that of the as-cast. The ultimate tensile strength was declined by about 2.5%, and the elongation was increased to 5.47%.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 124-130
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.124
• Online since: June 2017
• Authors: Shu Min Xu, Xin Ying Teng*, Xing Jing Ge, Jin Yang Zhang
• Keywords: Heat Treatment, Magnesium Alloys, Mechanical Properties, Microstructure, Nd Content

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