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首页> 外文会议>Diamond amp; Abrasives engineering supplementary 2008 >Residual stress and radial stress gradient in polycrystalline diamond compacts
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Residual stress and radial stress gradient in polycrystalline diamond compacts

机译：多晶金刚石复合片中的残余应力和径向应力梯度

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摘要

The differential thermal expansion of the polycrystalline diamond layer and the tungsten carbide substrate results in large residual stresses as PDC cutters cooling after sintering. The residual stresses on the top surface of the diamond layer of PDC were measured at five points along the radial direction of PDC using X-ray Diffraction Residual Stress Instrument, thus the stresses and their radial distribution were obtained. The results show that the stresses on the diamond surface are compressive, the biggest stress appears at the central point (about 1200 MPa), and that from the center to the edge of PDC, the magnitude of the stress decreases.A finite element analysis (FEA) was made to check the validity of the testing results. The FEA modeling results were found to correlate well with the measured values. Factors leading to the deviation between XRD experimental measurements and the calculations of residual stress by FEA were also analyzed .
机译：当PDC刀具在烧结后冷却时，多晶金刚石层和碳化钨基材的热膨胀差异会导致较大的残余应力。使用X射线衍射残余应力仪在沿PDC径向的五个点处测量了PDC金刚石层顶面上的残余应力，从而获得了应力及其径向分布。结果表明，金刚石表面的应力是压应力的，最大应力出现在中心点（约1200 MPa），并且从PDC的中心到边缘，应力的大小减小。进行FEA）以检查测试结果的有效性。发现FEA建模结果与测量值具有很好的相关性。分析了XRD实验测量与有限元分析残余应力的偏差。

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  • 来源
  • 会议地点 Zhengzhou(CN)
  • 作者

    Luo Hailing; rnXu Yongfeng; rnZhang Yingjun; rnZhang Xiaohong; rnLiu Kai;

  • 作者单位

    Xu Guoping@School of Materials Science Engineering, Central South University, Changsha 410083,Hunan,China;

    Changsha research institute of mining and metallurgy, Changsha 410012, Hunan, China--Yin Zhimin@School of Materials Science Engineering, Central South University, Changsha 410083,Hunan,China--Chen Qiwu@Changsha research institute of mining and metallurgy, Changsha 410012, Hunan, China--Xu Gen@School of Materials Science Engineering, Central South University, Changsha 410083,Hunan,China--;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TTB30;
  • 关键词

    Polycrystalline diamond; Residual stress; XRD; FEA;

    机译：多晶金刚石;残余应力; XRD; FEA;

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