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首页> 外文期刊>Materials Science and Engineering >Influence of solution treatment on microstructures and mechanical properties of a naturally-aged Al-27Zn-1.5Mg-1.2Cu-0.08Zr aluminum alloy
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Influence of solution treatment on microstructures and mechanical properties of a naturally-aged Al-27Zn-1.5Mg-1.2Cu-0.08Zr aluminum alloy

机译：溶液处理对天然老化Al-27Zn-1.5mg-1.2Cu-0.08亿铝合金微观结构和力学性能的影响

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摘要

Solution treatment and natural aging have been carried out to enhance the mechanical properties of a high-Zn aluminum alloy (Al-27Zn-1.5Mg-1.2Cu-O.08Zr) produced by melt spinning and extrusion. The studies show that the as-extruded alloy contains lots of Zn particles, Zn-rich η-MgZn_2 particles at grain boundaries and oxidation films at ribbon interfaces. The Zn particles and Zn-rich η-phases can be fully dissolved at 370 °C and 450 °C respectively. However, when solution temperature is higher than 400 °C, the brittle oxide films are difficult to accommodate the plastic strains caused by thermal contraction during quenching, which may result in over-heating and quench cracking. The optimized solution temperature for the high-Zn aluminum alloy is 400 °C. The solution-treated alloys reveal a strong naturally age hardening. Both η'-phase and GP-zones are the main hardening phases for the naturally peak-aged alloy solution-treated at 400 °C, whereas GP-zones exist as the main hardening phase for the alloys solution-treated at 350 °C. Naturally peak-aged alloy solution-treated at 400 °C shows the highest strength and elongation among all of the experimental alloys. Its superior strength is mainly due to its higher-density of dispersed nano-sized precipitates and higher η'-phase percentage.
机译：已经进行了溶液处理和天然老化，以增强通过熔融纺丝和挤出生产的高锌铝合金（Al-27Zn-1.5mg-1.2Cu-O.08Zr）的机械性能。研究表明，挤出合金含有大量Zn颗粒，在晶界和带界面的氧化膜上含有富含型抗η-MgZn_2颗粒。 Zn颗粒和富含Znη-相可以分别完全溶解在370℃和450℃。然而，当溶液温度高于400℃时，脆性氧化膜难以在淬火期间容纳由热收缩引起的塑料菌株，这可能导致过加热和淬火裂纹。高Zn铝合金的优化溶液温度为400°C。溶液处理过的合金揭示了强烈的天然增长的硬化。 η'-相和GP区都是在400℃下处理的天然峰老化合金溶液的主要硬化相，而GP区存在作为在350℃下处理的合金处理的合金的主要硬化相。在400℃下处理的天然峰老化合金溶液溶液显示了所有实验合金中的最高强度和伸长率。其优越的强度主要是由于其较高密度的分散纳米尺寸沉淀物和较高的η-相百分比。

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  • 来源
    《Materials Science and Engineering》 |2021年第20期|140623.1-140623.12|共12页
  • 作者

    Xianna Meng; Datong Zhang; Weiwen Zhang; Cheng Qiu; Guangxing Liang; Junjie Chen;

  • 作者单位

    Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic Materials And Key Laboratory of High Efficient Near-net-shape Forming Technology and Equipment for Metallic Materials Ministry of Education China (Category B) School of Mechanical and Automotive Engineering South China University of Technology Guangzhou 510640 China;

    Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic Materials And Key Laboratory of High Efficient Near-net-shape Forming Technology and Equipment for Metallic Materials Ministry of Education China (Category B) School of Mechanical and Automotive Engineering South China University of Technology Guangzhou 510640 China;

    Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic Materials And Key Laboratory of High Efficient Near-net-shape Forming Technology and Equipment for Metallic Materials Ministry of Education China (Category B) School of Mechanical and Automotive Engineering South China University of Technology Guangzhou 510640 China;

    Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic Materials And Key Laboratory of High Efficient Near-net-shape Forming Technology and Equipment for Metallic Materials Ministry of Education China (Category B) School of Mechanical and Automotive Engineering South China University of Technology Guangzhou 510640 China;

    Bode Aluminum Alloy Material Technology Co Ltd Duanzhou District Zhaoqing 526000 China;

    Bode Aluminum Alloy Material Technology Co Ltd Duanzhou District Zhaoqing 526000 China;

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  • 正文语种 eng
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  • 关键词

    High-Zn aluminum Alloy; Solution treatment; Natural aging; Microstructure; Mechanical property;

    机译：高锌铝合金;解决方案治疗;自然老化;微观结构;机械性质;

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