引張および圧縮予ひずみを導入した低炭素オーステナイト系ステンレス鋼のナノ-メゾ-マクロ強度解析 Nano-Meso-Macro Strength Analysis of Low Carbon Austenitic Stainless Steels Pre-Strained under Tension and Compression Loading

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  This report describes the nanoscopic strength analysis of low carbon austenitic stainless steel 316NG pre-strained to ±10% and ±20% true strain under tension and compression loading. This strength analysis was conducted, using an ultra-micro, micro and Vickers hardness testers and TEM. TEM observations showed that the micro-structural parameters relevant the analysis are the dislocation cell size, <i>d</i><sub>cel</sub> and the coarse slip band spacing, <i>l</i><sub>csl</sub>. 10<i>d</i><sub>cel</sub> or 10<i>l</i><sub>csl</sub> shows the position where fine grain strengthening by dislocation cells or slip spacing saturates and the hardness becomes constant. The Vickers hardness, <i>HV</i>, corresponding to the micro strength was expressed as <i>HV</i>=<i>Hv</i><sup>*</sup><sub>bas</sub>+<i>Hv</i><sup>*</sup><sub>sol</sub>+<i>Hv</i><sup>*</sup><sub>dis</sub>+<i>Hv</i><sup>*</sup><sub>cel</sub>+<i>Hv</i><sup>*</sup><sub>csl</sub>. <i>Hv</i><sup>*</sup><sub>bas</sub> is the base hardness, <i>Hv</i><sup>*</sup><sub>sol</sub> is the solid solution strengthening hardness, <i>Hv</i><sup>*</sup><sub>dis</sub> is the dislocation strengthening hardness in the dislocation cell, and <i>Hv</i><sup>*</sup><sub>cel</sub> and <i>Hv</i><sup>*</sup><sub>csl</sub> are the fine grain strengthening hardness due to the dislocation cell and coarse slip band, respectively. <i>Hv</i><sup>*</sup><sub>bas</sub>, <i>Hv</i><sup>*</sup><sub>sol</sub> and <i>Hv</i><sup>*</sup><sub>dis</sub> were about 100, 50 and 0, respectively, independently of the pre-strain of ±10% and ±20%. Accordingly, the Vickers hardness increment corresponding to the work hardening was equal to the sum of <i>Hv</i><sup>*</sup><sub>cel</sub> and <i>Hv</i><sup>*</sup><sub>csl</sub>. In other words, the work hardening due to tension and compression pre-straining up to ±20% is dominated by fine grain strengthening due to the dislocation cell and coarse slip band. This behavior was similar to that obtained in SUS316NG steel pre-strained by cold rolling in the previous study. It is concluded from those results that the work hardening mechanisms in SUS316NG steel are independent of the pre-strain method.<br>

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  • 日本金屬學會誌 = Journal of the Japan Institute of Metals  

    日本金屬學會誌 = Journal of the Japan Institute of Metals 70(6), 500-504, 2006-06-20 

    The Japan Institute of Metals

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各種コード

  • NII論文ID(NAID)
    10018161297
  • NII書誌ID(NCID)
    AN00062446
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00214876
  • NDL 記事登録ID
    8011265
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-314
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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