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首页> 外文会议>Transactions of the North American Manufacturing Research Institution of SME >A NUMERICAL STUDY OF INTERFACE BEHAVIOR OF DIAMOND COATED CUTTING TOOLS
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A NUMERICAL STUDY OF INTERFACE BEHAVIOR OF DIAMOND COATED CUTTING TOOLS

机译：金刚石涂层切削刀具界面行为的数值研究

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摘要

Interface delamination is the major weakness limiting diamond coating tool performance in machining. Thus, quantitative characterizations of the interface behavior are important to better understand and design diamond coating tools. In this study, we attempt to apply a cohesive zone model to investigate the coating-substrate interface behavior. The cohesive zone model is based on the traction-separation law with three characteristics determined from the material fracture properties. The model is implemented in finite element codes to simulate the indentation process and to analyze the delamination size of diamond coated tungsten-carbide substrates.rnThe simulation results indicate the following. Increasing the coating elasticity will reduce the delamination size due to the delay of substrate yielding. On the other hand, increasing the magnitude of coating residual stresses (compressive) will marginally increase therndelamination sizes. Moreover, a thicker coating tends to have greater resistance to the interface delamination.
机译：界面分层是限制金刚石涂层刀具在加工中性能的主要弱点。因此，界面行为的定量表征对于更好地理解和设计金刚石涂层工具很重要。在这项研究中，我们尝试应用一个内聚区模型来研究涂层-基底界面行为。内聚力区模型基于牵引分离法则，具有从材料断裂特性确定的三个特征。该模型以有限元代码实现，以模拟压痕过程并分析金刚石涂层碳化钨基片的分层尺寸。仿真结果表明：由于基底屈服的延迟，增加涂层的弹性将减小分层的大小。另一方面，增加涂层残余应力（压缩）的幅度会略微增加分层的尺寸。而且，较厚的涂层倾向于对界面分层具有更大的抵抗力。

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