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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effects of natural aging on the formation and strengthening effect of GP zones in a retrogression and re-aged Al-Zn-Mg-Cu alloy
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Effects of natural aging on the formation and strengthening effect of GP zones in a retrogression and re-aged Al-Zn-Mg-Cu alloy

机译:天然老化对逆簇和重新老化Al-Zn-Mg-Cu合金中GP区形成和强化作用的影响

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摘要

In this work, a new four-stage aging treatment by employing a natural aging prior to re-aging is designed to promote GP zones formation and subsequent shear-able strengthening effect in an Al-Zn-Mg-Cu alloy. The effects of natural aging on the microstructural evolution, tensile properties and stress corrosion cracking (SCC) behavior of Al-Zn-Mg-Cu alloy are carefully explored by atom probe tomography (APT) technique, transmission electron microscope (TEM) and differential scanning calorimetry (DSC) analysis. The results show that increased GP zones distributed in the matrix of the alloy subjected four-stage aging processing, finally contributing to the greater tensile strength properties and elongation of four-stage aging treated alloy. The SCC test results reveal that four-stage aging condition can enhance the corrosion resistance of the Al-Zn-Mg-Cu alloy without sacrificing much strength. (C) 2020 Elsevier B.V. All rights reserved.
机译:在这项工作中,通过在重新老化之前使用天然老化的新的四阶段老化处理旨在促进GP区形成和随后在Al-Zn-Mg-Cu合金中的剪切强化作用。 通过原子探测断层扫描(APT)技术,透射电子显微镜(TEM)和差示扫描,仔细探索了Al-Zn-Mg-Cu合金的微观结构衰老,拉伸性能和应力腐蚀裂纹(SCC)行为的影响 量热法(DSC)分析。 结果表明,在合金的基质中分布的增加的GP区经受了四级老化加工,最终有助于更大的拉伸强度性能和四级老化处理合金的伸长率。 SCC测试结果表明,四级老化条件可以增强Al-Zn-Mg-Cu合金的耐腐蚀性而不会牺牲大量强度。 (c)2020 Elsevier B.v.保留所有权利。

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