Influence of high-pressure torsion on formation/destruction of nano-sized spinodal structures

Ali Alhamidi, Kaveh Edalati, Zenji Horita

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The microstructures and hardness of Al - 30 mol.% Zn are investigated after processing by high-pressure torsion (HPT) for different numbers of revolutions, N = 1, 3, 10 or 25, as well as after post-HPT annealing at different temperatures, T = 373 K, 473 K, 573 K and 673 K. It was found that a work softening occurs by decreasing the grain size to the submicrometer level and increasing the fraction of high-angle boundaries. As a result of HPT processing, a complete decomposition of supersaturated solid solution of Zn in Al occurs and the spinodal structure is destroyed. This suggests that softening of the Al-Zn alloys after HPT is due to the decomposition of the supersaturated solid solution and destruction of spinodal decomposition. After post-HPT annealing, ultrafine-grained Al-Zn alloys show an unusual mechanical properties and its hardness increased to 187 HV. Microstructural analysis showed that the high hardness after post-HPT annealing is due to the formation of spinodal structures.

    Original languageEnglish
    Title of host publicationProceedings of the 3rd International Conference on Materials and Metallurgical Engineering and Technology, ICOMMET 2017
    Subtitle of host publicationAdvancing Innovation in Materials Science, Technology and Applications for Sustainable Future
    EditorsMas Irfan P. Hidayat
    PublisherAmerican Institute of Physics Inc.
    ISBN (Electronic)9780735416406
    DOIs
    Publication statusPublished - Apr 3 2018
    Event3rd International Conference on Materials and Metallurgical Engineering and Technology: Advancing Innovation in Materials Science, Technology and Applications for Sustainable Future, ICOMMET 2017 - Surabaya, Indonesia
    Duration: Oct 30 2017Oct 31 2017

    Publication series

    NameAIP Conference Proceedings
    Volume1945
    ISSN (Print)0094-243X
    ISSN (Electronic)1551-7616

    Other

    Other3rd International Conference on Materials and Metallurgical Engineering and Technology: Advancing Innovation in Materials Science, Technology and Applications for Sustainable Future, ICOMMET 2017
    CountryIndonesia
    CitySurabaya
    Period10/30/1710/31/17

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

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