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首页> 外文期刊>Journal of Manufacturing Processes >Probing residual stress evolution of titanium alloy due to belt grinding based on molecular dynamics method
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Probing residual stress evolution of titanium alloy due to belt grinding based on molecular dynamics method

机译：基于分子动力学方法的皮带磨削探测钛合金的残余应力演化

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摘要

Belt grinding is widely used as the final manufacturing step for the titanium alloy components to obtain excellent surface integrity, and the residual stress after grinding is one of the most concerning issues. However, the formation and evolution of residual stress due to belt grinding have not been well understood for a long time. In this study, a molecular dynamics (MD) model of abrasive grain cutting was established, and the titanium atoms were dynamically tracked from the beginning of cutting to the end of cooling to investigate the residual stress. The results show that the titanium atoms on both sides and underneath the abrasive grain showed different deformation patterns; besides, the titanium atoms close to the cutting surface moved faster during cooling than those far from the cutting surface, which eventually resulted in the initiation of residual stress. In addition, the residual stresses in the depth direction were primarily compressive stress, and those parallel to the cutting direction were tensile stress. Furthermore, a high-level residual compressive stress was found in the area ahead of the position of abrasive grain escaping, though the area did not contact the abrasive grain directly.
机译：皮带研磨广泛用作钛合金成分的最终制造步骤，以获得优异的表面完整性，并且研磨后的残余应力是最有关的问题之一。然而，长时间没有很好地理解由于皮带磨削引起的残余应力的形成和演变。在该研究中，建立了一种分子动力学（MD）磨粒切割模型，从切割到冷却结束时动态地跟踪钛原子，以研究残余应力。结果表明，磨粒两侧和下部的钛原子显示出不同的变形图案;此外，在冷却期间靠近切割表面的钛原子比远离切割表面的钛原子移动得更快，这最终导致残余应力的启动。另外，深度方向的残余应力主要是压缩应力，并且平行于切割方向的那些是拉伸应力。此外，在磨料谷物逸出的位置前面发现了高水平的残余压缩应力，尽管该区域没有直接接触研磨颗粒。

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  • 来源
    《Journal of Manufacturing Processes》 |2021年第6期|446-459|共14页
  • 作者

    Kun Zhou; Jinfei Liu; Guijian Xiao; Yun Huang; Kangkang Song; Jiayu Xu; Benqiang Chen;

  • 作者单位

    College of Mechanical and Vehicle Engineering Chongqing University Chongqing 400044 China;

    College of Mechanical and Vehicle Engineering Chongqing University Chongqing 400044 China;

    College of Mechanical and Vehicle Engineering Chongqing University Chongqing 400044 China;

    College of Mechanical and Vehicle Engineering Chongqing University Chongqing 400044 China;

    College of Mechanical and Vehicle Engineering Chongqing University Chongqing 400044 China;

    College of Mechanical and Vehicle Engineering Chongqing University Chongqing 400044 China;

    College of Mechanical and Vehicle Engineering Chongqing University Chongqing 400044 China;

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

    Belt grinding; Material removal; Molecular dynamics method; Residual stress; Titanium alloy;

    机译：皮带磨削;材料去除;分子动力学方法;残余应力;钛合金;

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