The kinetics of dynamic and static softening during multistage hot deformation of 7150 aluminum alloy

Fulin Jiang, Hui Zhang, Luoxing Li, Jianghua Chen

    研究成果: Contribution to journalArticle査読

    38 被引用数 (Scopus)

    抄録

    Isothermal continuous and interrupted hot compression tests have been carried out on Gleeble-1500 system at temperatures of 300°C and 400°C, strain rates of 0.01s -1 and 0.1s -1, respectively. The dynamic and static softening kinetics of 7150 aluminum alloy during multistage hot deformation were investigated by means of flow curves and relative softening rates. The results show that the flow curve exhibits a peak and some work softening during hot deformation of 7150 aluminum alloy. The flow stress increased with increasing strain rate and decreasing temperature while the flow softening decreased. The static softening increased with increasing strain rate, deformation temperature and delay time. The static softening curves appeared as a typical sigmoidal shape of the type at temperature of 400°C, while plateaus were observed when temperature decreased to 300°C. The appearance of static softening at 400°C exceeding 100% was observed. An empirical static recrystallization model based on Johnson-Mehl-Avrami-Kolmogorov model with the recrystallization activation energy of 219.17kJ/mol for 7150 aluminum alloy was derived.

    本文言語英語
    ページ(範囲)269-275
    ページ数7
    ジャーナルMaterials Science and Engineering A
    552
    DOI
    出版ステータス出版済み - 8 30 2012

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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