Factors influencing the equilibrium grain size in equal-channel angular pressing: Role of Mg additions to aluminum

Yoshinori Iwahashi, Zenji Horita, Minoru Nemoto, Terence G. Langdon

    研究成果: Contribution to journalArticle査読

    291 被引用数 (Scopus)

    抄録

    Experiments were undertaken to compare the equal-channel angular (ECA) pressing of Al-1 pet Mg and Al-3 pet Mg solid-solution alloys with pure Al. The results reveal both similarities and differences between these three materials. Bands of subgrains are formed in all three materials in a single passage through the die, and these subgrains subsequently evolve, on further pressings through the die, into an array of grains with high-angle boundaries. However, the addition of magnesium to an aluminum matrix decreases the rate of recovery and this leads, with an increasing Mg content, both to an increase in the number of pressings required to establish a homogeneous microstructure and to a decrease in the ultimate equiaxed equilibrium grain size. It is concluded that alloys exhibiting low rates of recovery should be especially attractive candidate materials for establishing ultrafine structures through grain refinement using the ECA pressing technique.

    本文言語英語
    ページ(範囲)2503-2510
    ページ数8
    ジャーナルMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
    29
    10
    DOI
    出版ステータス出版済み - 1998

    All Science Journal Classification (ASJC) codes

    • 凝縮系物理学
    • 材料力学
    • 金属および合金

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