Microstructural evolution in pure aluminum in the early stages of processing by high-pressure torsion

Cheng Xu, Zenji Horita, Terence G. Langdon

    研究成果: ジャーナルへの寄稿学術誌査読

    70 被引用数 (Scopus)

    抄録

    Measurements were taken to evaluate the evolution of homogeneity in disks of high-purity aluminum in the early stages of processing by high-pressure torsion. The results demonstrate that samples processed through 1/4 or more whole revolutions exhibit microhardness values which are generally higher in the centers of the disks than at the edges whereas after 1/8 turn the hardness is higher at the edge than in the center. It is shown that all of the hardness measurements are mutually consistent and they scatter around a unique curve when plotted against the equivalent strain. The measurements of hardness are supplemented by microstructural observations which provide evidence of a gradual evolution in the microstructure with increasing strain from an initial formation of subgrains to an array of ultrafine grains separated by boundaries having high angles of misorientation.

    本文言語英語
    ページ(範囲)2-7
    ページ数6
    ジャーナルMaterials Transactions
    51
    1
    DOI
    出版ステータス出版済み - 1月 2010

    !!!All Science Journal Classification (ASJC) codes

    • 材料科学一般
    • 凝縮系物理学
    • 材料力学
    • 機械工学

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