Effect of Cooling Condition on Zr-Rich Core Formation and Grain Size in Mg Alloy

Abstract:

The effects of cooling condition on the Zr-rich core formation and grain size in Mg-Zr alloys were investigated in this study. Four moulds with various cooling rates and different Zr additions were used. The results show that when Zr addition was 1.2%, the Zr-rich cores were round and their diameters increased with decreased cooling rates. When Zr addition content was decreased to 0.7%, Zr-rich cores formed only in the sand mould with the lowest cooling rate used in this study, and the morphology changed to rosette-like. The influence of cooling rate on grain size of Mg-Zr alloys was also investigated.

• Periodical: Advanced Materials Research (Volumes 189-193)
• Pages: 3920-3924
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.189-193.3920
• Online since: February 2011
• Authors: Hong Hui Liu, Zhing Liang Ning, Fu Yang Cao, Zhi Jun Meng, Jian Fei Sun
• Keywords: Cooling Rate, Grain Size, Zr Addition, Zr-Rich Core Formation

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