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首页> 外文期刊>International journal of corrosion >Stress-Corrosion Cracking Property of Aluminum-Magnesium Alloy Processed by Equal-Channel Angular Pressing
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Stress-Corrosion Cracking Property of Aluminum-Magnesium Alloy Processed by Equal-Channel Angular Pressing

机译：等通道转角挤压铝镁合金的应力腐蚀开裂性能

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摘要

Stress-corrosion cracking property of an aluminum-magnesium alloy processed by equal-channel angular pressing (ECAP) was investigated by a slow strain-rate tensile technique in a 3% NaCl solution of pH 4.2 at 303 K. The maximum stress and elongation of the Al-Mg alloy were lower in the NaCl solution than in air. The stress-corrosion cracking property was evaluated by the decrease ratio of maximum stress and elongation of the Al-Mg alloy with NaCl solution, Ⅰ(δ_(max)) and Ⅰ(δ), respectively. Ⅰ(δ_(max)) and Ⅰ(δ) were lower with ECAP than without it, showing that the susceptibility of stress-corrosion cracking decreased with ECAP. The polarization curve and time dependence of the anodic current density at constant potential of the Al-Mg alloy in the NaCl solution revealed that the anodic current density was lower with ECAP than without it, or the corrosion resistance of the Al-Mg alloy was improved by ECAP. The decrease in stress-corrosion crack susceptibility of the Al-Mg alloy with ECAP is attributed to an improvement in corrosion resistance afforded by ECAP.
机译：在303 K的pH 4.2的3％NaCl溶液中，通过慢应变速率拉伸技术研究了等通道角压（ECAP）处理的铝镁合金的应力腐蚀开裂性能。 NaCl溶液中的Al-Mg合金比空气中的低。用NaCl溶液使Al-Mg合金的最大应力与伸长率的减小率分别为Ⅰ（δ_（max））和Ⅰ（δ）来评价其应力腐蚀开裂性能。 ECAP的Ⅰ（δ_（max））和Ⅰ（δ）低于无ECAP，表明ECAP降低了应力腐蚀开裂的敏感性。在NaCl溶液中Al-Mg合金在恒定电位下的极化曲线和阳极电流密度的时间依赖性表明，使用ECAP时，阳极电流密度低于不使用ECAP时，或提高了Al-Mg合金的耐腐蚀性通过ECAP。使用ECAP可使Al-Mg合金的应力腐蚀裂纹敏感性降低，这归因于ECAP提供的耐腐蚀性的提高。

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  • 来源
    《International journal of corrosion》 |2012年第1期|543212.1-543212.8|共8页
  • 作者

    Hiroaki Nakano; Satoshi Oue; Seiji Taguchi; Shigeo Kobayashi; Zenji Horita;

  • 作者单位

    Department of Materials Science & Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;

    Department of Materials Science & Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;

    Department of Materials Process Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan,JFE Steel Corporation, Japan;

    Department of Applied Chemistry and Biochemistry, Kyushu Sangyo University, 2-3-1 Matsukadai, Higashi-ku, Fukuoka 813-8503, Japan;

    Department of Materials Science & Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;

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