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首页> 外文期刊>Journal of Manufacturing Processes >Effects of base metal state on the microstructure and mechanical properties of Al-Mg-Si alloy friction stir-welded joints
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Effects of base metal state on the microstructure and mechanical properties of Al-Mg-Si alloy friction stir-welded joints

机译：基础金属状态对Al-Mg-Si合金摩擦焊接接头微观结构和力学性能的影响

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摘要

Al-Mg-Si alloys with different heat treatment states were used as base metals (BMs) in investigating the effect of BM state on the microstructure and mechanical properties of Al-Mg-Si alloy friction stir-welded (FSW) joints. The Al grains and insoluble phases of the FSW joints were not affected by BM state, but the compositions of the precipitated phases in the heat-affected zones (HAZs) and nugget zones (NZs) depended on the phase compositions of the BMs. The FSW joint that was welded using the BM with water quenching (WQ) and artificial aging state exhibited the greatest hardness among the joints at the same zones because of the high densities of the beta phases in the BM, the fine and high densities of the beta' phases in the HAZ, the high number of solution atoms, and the formation of Guinier-Preston zones in the NZ. Moreover, the joint exhibited the highest yield strength because of the high hardness of its HAZ, which is the fracture location in FSW joints. The FSW joint that was welded using the BM with WQ and natural aging state exhibited the highest ultimate tensile strength and tensile elongation because of its high structural uniformity.
机译：用不同热处理状态的Al-Mg-Si合金用作基础金属（BMS），研究了BM状态对Al-Mg-Si合金摩擦焊接（FSW）接头的微观结构和机械性能的影响。 FSW关节的Al晶粒和不溶性阶段不受BM状态的影响，但沉淀的相中沉淀相的组合物在热影响的区域（HAZS）和块状区（NZS）中依赖于BMS的相组合物。使用BM焊接的FSW接头具有水猝灭（WQ）和人工老化状态，并且由于BM中的β相的高密度，细长和高密度的β相的高密度表现出相同区域的关节中最大的硬度。 β在HAZ中的阶段，溶液原子数量大，以及NZ中的Guinier-Preston区的形成。此外，该接头由于其HAZ的高硬度而表现出最高的屈服强度，这是FSW关节中的裂缝位置。使用具有WQ和天然老化状态的BM焊接的FSW接头表现出最高的极限拉伸强度和拉伸伸长率，因为其具有高结构均匀性。

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  • 来源
    《Journal of Manufacturing Processes》 |2020年第8期|248-257|共10页
  • 作者

    Xu Z. Z.; Liu C. Y.; Zhang B.; Huang H. F.; Cheng W.;

  • 作者单位

    Guilin Univ Technol Key Lab New Proc Technol Nonferrous Met & Mat Minist Educ Guilin 541004 Peoples R China;

    Guilin Univ Technol Key Lab New Proc Technol Nonferrous Met & Mat Minist Educ Guilin 541004 Peoples R China;

    Yanshan Univ State Key Lab Metastable Mat Sci & Technol Qinhuangdao 066004 Hebei Peoples R China;

    Guilin Univ Technol Key Lab New Proc Technol Nonferrous Met & Mat Minist Educ Guilin 541004 Peoples R China;

    Guilin Univ Technol Key Lab New Proc Technol Nonferrous Met & Mat Minist Educ Guilin 541004 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Al alloy; Heat treatment; Friction stir welding; Microstructure; Phase evolution; Mechanical properties;

    机译：Al合金;热处理;摩擦搅拌焊接;微观结构;相位演化;机械性能;

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