Exceptional superplasticity in an AZ61 magnesium alloy processed by extrusion and ECAP

Yuichi Miyahara, Zenji Horita, Terence G. Langdon

    研究成果: Contribution to journalArticle査読

    147 被引用数 (Scopus)

    抄録

    Experiments were conducted on a commercial AZ61 alloy to evaluate the potential for achieving an ultrafine grain size and superplastic ductilities through the use of the EX-ECAP two-step processing procedure of extrusion plus equal-channel angular pressing. The results show that EX-ECAP gives excellent grain refinement with grain sizes of ∼0.6 and ∼1.3 μm after pressing at 473 and 523 K, respectively. The alloy processed by EX-ECAP exhibits exceptional superplastic properties including a maximum elongation of 1320% after pressing through four passes when testing at 473 K with an initial strain rate of 3.3 × 10-4 s-1. This result compares with an elongation of ∼70% achieved in the extruded condition without ECAP under similar testing conditions.

    本文言語英語
    ページ(範囲)240-244
    ページ数5
    ジャーナルMaterials Science and Engineering A
    420
    1-2
    DOI
    出版ステータス出版済み - 3 25 2006

    All Science Journal Classification (ASJC) codes

    • 材料科学(全般)
    • 凝縮系物理学
    • 材料力学
    • 機械工学

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