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首页> 外文期刊>Materials Science and Engineering >Achieving exceptionally tensile properties and damage tolerance of 5083 aluminum alloy by friction stir processing assisted by ultrasonic and liquid nitrogen field
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Achieving exceptionally tensile properties and damage tolerance of 5083 aluminum alloy by friction stir processing assisted by ultrasonic and liquid nitrogen field

机译：通过超声波和液氮磁场辅助摩擦搅拌加工实现5083铝合金的特殊拉伸性能和损伤容耐损伤

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摘要

The emergence of gradient structures has realized the possibility of improving the strength and plasticity of metals simultaneously. This study analyses the effects of introducing ultrasonic and liquid nitrogen during conventional stirring and friction treatment. The results show that the mechanical properties and damage tolerance of 5083 aluminum (Al) alloy can be substantially improved by the simultaneous application of two external fields (called UNFSP specimens). The average yield strength and tensile strength of the UNFSP specimens were 58.2% and 27.5% higher than those of the as-received 5083 Al alloy without reduction in its elongation, respectively. In addition, compared with the as-received 5083 Al alloy, the threshold of fatigue crack propagation and the fracture threshold of the UNFSP specimens also increased by 62.9% and 25.7%, respectively. The main reason for these improvements was the contribution of the gradient structure with high density of geometrically necessary dislocations, thicker fine grains layer, and seriously refined Fe/Mn-containing particles.
机译：梯度结构的出现已经意识到同时提高金属的强度和可塑性。该研究分析了在常规搅拌和摩擦处理过程中引入超声波和液氮的影响。结果表明，通过同时施加两个外部场（称为UNFSP标本），可以基本上改善5083铝（Al）合金的机械性能和损伤容差。 UNDSP样品的平均屈服强度和拉伸强度分别高于2583 al合金的58.2％和27.5％，分别不会降低其伸长率。另外，与接收的5083 al合金相比，疲劳裂纹谱的阈值和UNFSP样品的裂缝阈值也分别增加了62.9％和25.7％。这些改进的主要原因是梯度结构具有高密度的几何必要脱位，较厚的细晶粒层，并重要精制Fe / Mn的颗粒。

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  • 来源
    《Materials Science and Engineering》 |2021年第4期|140824.1-140824.12|共12页
  • 作者

    Mingyang Ma; Ruilin Lai; Jin Qin; Bin Wang; Huiqun Liu; Danqing Yi; Tongguang Zhai;

  • 作者单位

    School of Materials Science and Engineering Central South University Changsha Hunan 410083 China Key Laboratory for Nonferrous Materials Science and Engineering Ministry of Education Central South University Changsha 410083 China;

    State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China;

    School of Materials Science and Engineering Central South University Changsha Hunan 410083 China Key Laboratory for Nonferrous Materials Science and Engineering Ministry of Education Central South University Changsha 410083 China;

    School of Materials Science and Engineering Central South University Changsha Hunan 410083 China Key Laboratory for Nonferrous Materials Science and Engineering Ministry of Education Central South University Changsha 410083 China;

    School of Materials Science and Engineering Central South University Changsha Hunan 410083 China Key Laboratory for Nonferrous Materials Science and Engineering Ministry of Education Central South University Changsha 410083 China;

    School of Materials Science and Engineering Central South University Changsha Hunan 410083 China Key Laboratory for Nonferrous Materials Science and Engineering Ministry of Education Central South University Changsha 410083 China;

    Department of Chemical and Materials Engineering University of Kentucky Lexington KY 40506 USA;

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  • 正文语种 eng
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  • 关键词

    5083 Al alloy; Gradient structure; Tensile properties; Fatigue damage tolerance;

    机译：5083铝合金;梯度结构;拉伸性能;疲劳损害耐受性;

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