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Research Article

Effect of multi-pass friction stir processing and Mg addition on microstructure and tensile properties of Al-1050 alloy

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  • Received: 19 February 2020Revised: 20 April 2020Accepted: 21 April 2020Available online: 24 April 2020
  • The effect of multiple passes of friction stir processing (FSP) and the addition of Mg powder on different parts of the microstrcuture processed including the stir zone (SZ), the heat-affected zone (HAZ), and the thermo-mechanically affected zone (TMAZ) were investigated. The results of the microstructural observations revealed that although the grain size of the SZ decreased in both the non-composite and composite samples, the grain size increased in the TMAZ and the HAZ of the non-composit sample with increasing the numer of FSP passes. Besides, the addition of Mg powder resulted in much more significant grain refinement. Moreover, increasing the number of the FSP passes resulted in a more uniform distribution of Al-Mg intermetallic compounds in the in-situ composite sample. The results of the tensile testing showed that the four- passes FSPed non-composite sample exhibited a higher elongation percentage with a ductile fracture compared with those of the base metal and the four-pass composite sample while lattermost sample exhibited a brittle fracture and a higher tensile strength value than the base metal and the four-pass FSPed non-composite sample. The fabrication of composite samples resulted in noticeable enhancement of hardness compared with the base metal and the non-composite FSPed samples.
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    [2] Xiao-hui Ao, Shu-ming Xing, Bai-shui Yu, and  Qing-you Han, Effect of Ce addition on microstructures and mechanical properties of A380 aluminum alloy prepared by squeeze-casting, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1602-y
    [3] Hamed Jamshidi Aval, Microstructural evolution and mechanical properties of friction stir-welded C71000 copper-nickel alloy and 304 austenitic stainless steel, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1682-8
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    [5] Tevfik Küçükömeroğlu, Semih M. Aktarer, Güven İpekoğlu, and  Gürel Çam, Microstructure and mechanical properties of friction-stir welded St52 steel joints, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1700-x
    [6] Ali Shamsipur, Amir Anvari, and  Ahmad Keyvani, Improvement of microstructure and corrosion properties of friction stir welded AA5754 by adding Zn interlayer, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1646-z
    [7] Hui Xu, Gong-zhen Zhang, Wei Cui, Shu-bin Ren, Qian-jin Wang, and  Xuan-hui Qu, Effect of Al2O3sf addition on the friction and wear properties of (SiCp+Al2O3sf)/Al2024 composites fabricated by pressure infiltration, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1581-z
    [8] Xiao-feng Wang, Ming-xing Guo, Cun-qiang Ma, Jian-bin Chen, Ji-shan Zhang, and  Lin-zhong Zhuang, Effect of particle size distribution on the microstructure, texture, and mechanical properties of Al–Mg–Si–Cu alloy, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1645-0
    [9] Ji-hong Dong, Chong Gao, Yao Lu, Jian Han, Xiang-dong Jiao, and  Zhi-xiong Zhu, Microstructural characteristics and mechanical properties of bobbin-tool friction stir welded 2024-T3 aluminum alloy, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1392-7
    [10] Zhi-hao Zhang, Jie Xue, Yan-bin Jiang, and  Feng Jin, Effect of pre-annealing treatment on the microstructure and mechanical properties of extruded Al-Zn-Mg-Cu alloy bars, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1521-3
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Effect of multi-pass friction stir processing and Mg addition on microstructure and tensile properties of Al-1050 alloy

  • Corresponding author:

    Shahin Arshadi Rastabi    E-mail: Shahinarshadi1990@gmail.com

  • Department of Mining and Metallurgy, Yazd University, Yazd, Iran

Abstract: The effect of multiple passes of friction stir processing (FSP) and the addition of Mg powder on different parts of the microstrcuture processed including the stir zone (SZ), the heat-affected zone (HAZ), and the thermo-mechanically affected zone (TMAZ) were investigated. The results of the microstructural observations revealed that although the grain size of the SZ decreased in both the non-composite and composite samples, the grain size increased in the TMAZ and the HAZ of the non-composit sample with increasing the numer of FSP passes. Besides, the addition of Mg powder resulted in much more significant grain refinement. Moreover, increasing the number of the FSP passes resulted in a more uniform distribution of Al-Mg intermetallic compounds in the in-situ composite sample. The results of the tensile testing showed that the four- passes FSPed non-composite sample exhibited a higher elongation percentage with a ductile fracture compared with those of the base metal and the four-pass composite sample while lattermost sample exhibited a brittle fracture and a higher tensile strength value than the base metal and the four-pass FSPed non-composite sample. The fabrication of composite samples resulted in noticeable enhancement of hardness compared with the base metal and the non-composite FSPed samples.

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