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Volume 24 Issue 8
Aug.  2017
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文章导航 >  矿物冶金与材料学报（英文）  > 2017  >  24(8): 937-942
E. Pourkhorshid, M. H. Enayati, S. Sabooni, F. Karimzadeh, and M. H. Paydar, Bulk Al-Al3Zr composite prepared by mechanical alloying and hot extrusion for high-temperature applications, Int. J. Miner. Metall. Mater., 24(2017), No. 8, pp. 937-942. https://doi.org/10.1007/s12613-017-1481-7
Cite this article as:
E. Pourkhorshid, M. H. Enayati, S. Sabooni, F. Karimzadeh, and M. H. Paydar, Bulk Al-Al3Zr composite prepared by mechanical alloying and hot extrusion for high-temperature applications, Int. J. Miner. Metall. Mater., 24(2017), No. 8, pp. 937-942. https://doi.org/10.1007/s12613-017-1481-7
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研究论文

Bulk Al-Al3Zr composite prepared by mechanical alloying and hot extrusion for high-temperature applications

  • Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran

  • Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran

  • 通讯作者:

    S. Sabooni    E-mail: s.sabooni@ma.iut.ac.ir

  • Bulk Al/Al3Zr composite was prepared by a combination of mechanical alloying (MA) and hot extrusion processes. Elemental Al and Zr powders were milled for up to 10 h and heat treated at 600℃ for 1 h to form stable Al3Zr. The prepared Al3Zr powder was then mixed with the pure Al powder to produce an Al-Al3Zr composite. The composite powder was finally consolidated by hot extrusion at 550℃. The mechanical properties of consolidated samples were evaluated by hardness and tension tests at room and elevated temperatures. The results show that annealing of the 10-h-milled powder at 600℃ for 1 h led to the formation of a stable Al3Zr phase. Differential scanning calorimetry (DSC) results confirmed that the formation of Al3Zr began with the nucleation of a metastable phase, which subsequently transformed to the stable tetragonal Al3Zr structure. The tension yield strength of the Al-10wt%Al3Zr composite was determined to be 103 MPa, which is approximately twice that for pure Al (53 MPa). The yield stress of the Al/Al3Zr composite at 300℃ is just 10% lower than that at room temperature, which demonstrates the strong potential for the prepared composite to be used in high-temperature structural applications.
    • Research Article

    Bulk Al-Al3Zr composite prepared by mechanical alloying and hot extrusion for high-temperature applications

    + Author Affiliations
      Abstract
    • Bulk Al/Al3Zr composite was prepared by a combination of mechanical alloying (MA) and hot extrusion processes. Elemental Al and Zr powders were milled for up to 10 h and heat treated at 600℃ for 1 h to form stable Al3Zr. The prepared Al3Zr powder was then mixed with the pure Al powder to produce an Al-Al3Zr composite. The composite powder was finally consolidated by hot extrusion at 550℃. The mechanical properties of consolidated samples were evaluated by hardness and tension tests at room and elevated temperatures. The results show that annealing of the 10-h-milled powder at 600℃ for 1 h led to the formation of a stable Al3Zr phase. Differential scanning calorimetry (DSC) results confirmed that the formation of Al3Zr began with the nucleation of a metastable phase, which subsequently transformed to the stable tetragonal Al3Zr structure. The tension yield strength of the Al-10wt%Al3Zr composite was determined to be 103 MPa, which is approximately twice that for pure Al (53 MPa). The yield stress of the Al/Al3Zr composite at 300℃ is just 10% lower than that at room temperature, which demonstrates the strong potential for the prepared composite to be used in high-temperature structural applications.
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