Effects of Gd on Microstructure and Mechanical Properties of AZ61 Magnesium Alloy

Abstract:

The effects of different amounts of rare earth Gd added into AZ61 on the microstructure and mechanical properties of magnesium alloys were studied in this paper. And it adopts T6 heat treatment. When 2% Gd has been added, the microstructure of the alloy becomes uniform. The grains are refining. Gd is prior to reacting with Al for forming Al₂Gd phase with high melting point. It is in the form of dot-like and globosity along the grain boundary. And β-Mg₁₇A1₁₂ phase is reduced and its shape is thinner. The Al₂Gd phase hinders dislocation movement. It markedly improves the mechanical properties of the alloy at room temperature and high temperature.

• Periodical: Advanced Materials Research (Volumes 284-286)
• Pages: 500-504
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.284-286.500
• Online since: July 2011
• Authors: Dai Dong Zhang, Hu Zhang, Xue Hua Yu, Xiao Ru Zhang, Da Qing Fang
• Keywords: Al₂Gd, Gd, Magnesium Alloy, Microstructure

References

[1] Yang Bin, Development Summarize for Study and Manufacture of Magnesium Alloys. casting equipment preparation research, No.1 (2001), pp.36-39

[2] Xu Guangxian. Rare earth. Beijing: metallurgical industry press (1997)

[3] Moreno IP, Nandy TK, Jones JW, Allison JE, Pollock TM. Microstructural stability and creep of rare-earth containing magnesium alloys. Scripta Materialia, No.48 (2003), pp.1029-1034

DOI: 10.1016/s1359-6462(02)00595-x

[4] Yu Kun, Li Wenxian, Li Songrui, Tan Dunqiang. The Research and Development of Mg-Rare Earth Alloy. Special Casting & Nonferrous Alloys,No.1 (2001), pp.41-44

[5] Sun Ming, Wu Guohua, Wang wei, Chen Bin, Hou Zhengquan, Ding Wenjiang. Research Progress of Mg-Gd Alloy, Materials Review, Vol.23, No.6 (2009), pp.98-103

[6] Jin Guangyong, Wu Yufeng, Li Jianhui, Du Wenbo. Effects of Gd Addition on Microstructure and Mechanical Properties of Mg-2Al-Zn Alloy. Special Casting and Nonferrous Alloys, Vol.27, No.8 (2007), pp.642-646

[7] Zhou Haitao, Ma Chunjiang, Wei Yihong, Ding Wenjiang, ZhuYanping. AZ61 cerium on magnesium alloy as-cast microstructure and the influence of the structure of high technology communication, No.1 (2003), pp.53-56

[8] Zhang Daidong, Kang Yun, Gong Changwei, Yuan Hongjia, Yan Zhijie. Study on microstructures of AZ61+xCe(x=0-1.5) alloys. Journal of Chinese Electron Microscopy Society, Vol.29, No.1 (2010), pp.754-758

[9] Zhang Shijun, Li Wenxian, Yu Kun. The Effect of Ce on the Grain Size and As-cast Mechanical Properties of Magnesium Alloy AZ31. Foundry, Vol.51, No.12 (2002), pp.765-771

[10] Chen Furong, Li Shihui, Guo Feng, Chang Shuqin. Effect of Ce on Microstructure and Mechanical Property of AZ91D Magnesium Alloy. Foundry Technology,Vol.30, No.2 (2009), pp.203-206

[11] Yang Mingbo, Pan fusheng. Li zhongsheng, Zhang Jing. Alloying Elements and Their Effects in Mg-Al Based Elevated Temperature Magnesium Alloys. Materials Review, Vol.19, No.4 (2005), pp.46-49

[12] Hao Baohong, Chen Fangfang, Li Yan Study on the Casting Mechanism and Functions of Graphite Ball Journal of Beijing Institute of Petro-chemical Technology, Vol.15, No.3 (2007), pp.52-55