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首页> 外文期刊>Materials Science and Engineering >Microstructures and mechanical properties of Gas Tungsten Arc Welded joints of new Al-Mg-Sc and Al-Mg-Er alloy plates
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Microstructures and mechanical properties of Gas Tungsten Arc Welded joints of new Al-Mg-Sc and Al-Mg-Er alloy plates

机译:新型Al-Mg-Sc和Al-Mg-Er合金板的钨极氩弧焊接头的组织和力学性能

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摘要

The effect of microalloy element Sc and Er on Gas Tungsten Arc Welded (GTAW) joints of Al-Mg alloy was studied by comparative method. The microstructures and mechanical properties of Al-Mg-Sc and Al-Mg-Er alloy welded joint were examined by microhardness measurement, tensile test, optical microscopy and transmission electron microscope. The strength of Al-Mg-Sc welded joint is higher than that of Al-Mg-Er welded joint. The differences of the two welded joints can be attributed to the different thermal stability and the effect of Al_3(Sc_(1-x),Zr_x) particles and Al_3(Er_(1-x),Zr_x) particles. Al_3(Sc_(1-x),Zr_x) particles, which have higher thermal stability, are still coherent with Al matrix in the HAZ, can strongly pin dislocations and subgrain boundaries of the HAZ. There are strain strengthening and precipitation strengthening in the HAZ of Al-Mg-Sc welded joints. Notable coarsening of Al3(Er_(1-x),Zr_x) particles and recrystallization in the HAZ of Al-Mg-Er welded joint lead to the reduction and disappearance of strain strengthening and precipitation strengthening.
机译:通过比较方法研究了微合金元素Sc和Er对Al-Mg合金气钨极氩弧焊(GTAW)接头的影响。通过显微硬度测量,拉伸试验,光学显微镜和透射电子显微镜对Al-Mg-Sc和Al-Mg-Er合金焊接接头的组织和力学性能进行了研究。 Al-Mg-Sc焊接接头的强度高于Al-Mg-Er焊接接头的强度。两个焊接接头的差异可归因于不同的热稳定性以及Al_3(Sc_(1-x),Zr_x)颗粒和Al_3(Er_(1-x),Zr_x)颗粒的影响。具有较高热稳定性的Al_3(Sc_(1-x),Zr_x)粒子仍与热影响区中的Al基体相干,可以强烈地钉扎热影响区的位错和亚晶界。 Al-Mg-Sc焊接接头的热影响区有应变强化和沉淀强化。 Al3(Er_(1-x),Zr_x)颗粒的明显粗化和Al-Mg-Er焊接接头热影响区的重结晶导致应变强化和沉淀强化的减少和消失。

著录项

  • 来源
    《Materials Science and Engineering》 |2015年第3期|149-154|共6页
  • 作者单位

    Key Laboratory of Super-Microstructure and Ultrafast Process in Advanced Materials of Hunan Province, School of Physics and Electronics, Central South University, Changsha, Hunan 410083, China ,School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;

    Key Laboratory of Super-Microstructure and Ultrafast Process in Advanced Materials of Hunan Province, School of Physics and Electronics, Central South University, Changsha, Hunan 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Al-Mg-Sc; Al-Mg-Er; Welding; Microstructure; Mechanical properties;

    机译:Al-Mg-Sc;铝镁-焊接;微观结构机械性能;

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