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Influences of Y and Y-Rich Mischmetal Additions on Microstructure and Compressive Properties of As-Cast Al-Mg-Mn Alloy

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Abstract

The influences of Y and Y-rich mischmetal (Ym) additions on microstructural and compressive properties of as-cast Al-13Mg-0.8Mn alloy prepared by vacuum suction casting were investigated in this study. The average secondary dendrite arm spacing (SDAS) was decreased when adding Y and Ym additions. Moreover, the Al2Y and Al2Ym phases formed during the solidification were mainly distributed along the grain boundary. The mechanical results reveal that both Y and Ym additions are effective in increasing the compressive strength and hardness. The values of yield compressive strength, ultimate compressive strength, and Brinell hardness of the as-cast Al-13Mg-0.8Mn-0.8Y alloy are 357 MPa, 510 MPa, and 138, respectively. The improved mechanical properties are mainly attributed to fine SDAS and precipitation strengthening. A typical cleavage fracture mode is observed on the compressive fracture surfaces of the alloys.

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Acknowledgments

This study was supported by Doctoral Fund (No. 20112005) of Taiyuan University of Science and Technology, Taiyuan, Shanxi, China.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024, Shanxi, China

    Daqing Fang, Xiaoru Zhang, Yaxu Jin, Yuesheng Chai & Daidong Zhang

  2. Key Laboratory of Automobile Materials, College of Materials Science and Engineering, Jilin University, Nanling Campus, Changchun, 130025, China

    Guangli Bi, Jing Jiang & Zhonghao Jiang

  3. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, China

    Guangli Bi & Jing Jiang

  4. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China

    Qiuming Peng

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  1. Daqing Fang
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Correspondence to Daqing Fang.

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Fang, D., Bi, G., Jiang, J. et al. Influences of Y and Y-Rich Mischmetal Additions on Microstructure and Compressive Properties of As-Cast Al-Mg-Mn Alloy. J. of Materi Eng and Perform 22, 1201–1207 (2013). https://doi.org/10.1007/s11665-012-0394-x

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  • DOI: https://doi.org/10.1007/s11665-012-0394-x

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