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Effect of partial rolling on the microstructure, mechanical properties and fracture behavior of AZ31 Mg alloy joints

机译：部分轧制对AZ31镁合金接头组织，力学性能和断裂行为的影响

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摘要

Partial rolling processes at different temperatures were conducted on the fusion zone (FZ) of double-side welded Mg-3Al-lZn alloy joints with excess weld bead. The effect of rolling reduction and rolling temperature on the microstructure, mechanical properties and fracture behavior of the joints were investigated. Results show that both the strength and elongation of the joints increase significantly with rolling reduction owing to the microstructure evolution in the FZ. Once rolling reduction exceeds a critical value (CRR), tensile fracture location will be transferred from the FZ to the substrate and the joints can achieve tensile properties roughly the same as those of the initial substrate. Rolling at a lower temperature is preferred to obtaining a weak basal texture in the FZ, for the corresponding CRR is smaller.
机译：在具有过量焊缝的双面焊接Mg-3Al-1Zn合金接头的熔合区（FZ）上进行了不同温度下的部分轧制过程。研究了压下量和轧制温度对接头组织，力学性能和断裂行为的影响。结果表明，由于FZ组织的演变，接头的强度和伸长率均随着轧制率的降低而显着增加。一旦轧制压下率超过临界值（CRR），拉伸断裂的位置就会从FZ转移到基材上，并且接头可以实现与初始基材大致相同的拉伸性能。在较低的温度下轧制比在FZ中获得较弱的基础纹理更可取，因为相应的CRR较小。

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  • 来源
    《Materials Science and Engineering》 |2015年第3期|1-9|共9页
  • 作者

    Sensen Chai; Dingfei Zhang; Yufeng Dong; Fusheng Pan;

  • 作者单位

    College of Materials Science and Engineering, Chongqing University, Chongqing 400045, PR China;

    College of Materials Science and Engineering, Chongqing University, Chongqing 400045, PR China ,National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, PR China;

    College of Materials Science and Engineering, Chongqing University, Chongqing 400045, PR China;

    College of Materials Science and Engineering, Chongqing University, Chongqing 400045, PR China ,National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, PR China;

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

    Magnesium alloys; Welding; Rolling; Fracture; Mechanical properties;

    机译：镁合金;焊接;滚动断裂;机械性能;

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