Preparation and Characterization of As-Cast and Hot-Rolled Mg-5Al-0.3Mn-1Ce Alloy

Abstract:

Mg-5Al-0.3Mn-1Ce alloy was prepared by metal mould casting method. The as-cast ingot was homogenized and hot-rolled with total thickness reduction of 61% after four passes. Texture, microstructure and mechanical properties of the studied alloy were investigated. Results showed that the as-cast sample was mainly composed of a-Mg, Mg₁₇Al₁₂ and Al₁₁Ce₃ phases. Average grain size of the as-cast sample was about 500 μm. After hot-rolling, average grain size was greatly refined to about 20 μm. Further more, the long acicular Al₁₁Ce₃ phase was smashed to small pieces. Tensile test results demonstrated that ultimate tensile strength and yield strength of the hot-rolled sample were improved by 65.2% and 165% respectively compared with those of the as-cast sample. Strength enhancement was attributed to grain refining strengthening and dislocation strengthening mechanisms.

• Periodical: Advanced Materials Research (Volumes 284-286)
• Pages: 1559-1563
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.284-286.1559
• Online since: July 2011
• Authors: Jian Li Wang, Jian Ping Li, Li Min Wang, Li Dong Wang
• Keywords: Hot Rolling, Mg-5Al-0.3Mn-1Ce, Microstructure

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