Abstract Residual stress plays an important role in controlling the performance of high-precision martensitic steel parts, as it affects the properties of the material in various ways. At present, the dynamic evolution of the phase transition mechanism in residual stress generation is not yet fully understood, and there have been few quantitative studies on the effect of phase transitions on the residual stress generated in the micro-grinding process. In this study, flow stress was modeled by considering the specific volume and yield stress in the phase-transition process, and a user-defined constitutive model was developed. A finite-element model that simulates the movement and application of thermo-mechanical loading and phase transitions on the surface and subsurface of the machined material was developed to predict the residual stress generated by micro-grinding. The accuracy of the simulations and the effect of phase transitions on the residual stress were experimentally verified. The results showed that the effect of phase transitions on the residual stress was mainly reflected in the tangential subsurface. This study used a novel approach in the analysis of residual stress induced by micro-grinding and established two process optimization criteria for the reduction of residual stress. The results of this study provide a more comprehensive understanding of the phase transition and residual stress mechanisms governing the grinding process, which could potentially be useful for improving the reliability of high-strength martensitic steel components.

中文翻译：

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相变对微磨削残余应力的影响

摘要 残余应力在控制高精度马氏体钢零件的性能方面起着重要作用，因为它以多种方式影响材料的性能。目前，残余应力产生中相变机制的动态演化尚未完全了解，关于相变对微磨削过程中产生的残余应力影响的定量研究较少。在本研究中，通过考虑相变过程中的比体积和屈服应力对流动应力进行建模，并开发了用户定义的本构模型。开发了一个有限元模型，模拟热机械载荷的运动和应用以及加工材料表面和亚表面上的相变，以预测微磨削产生的残余应力。通过实验验证了模拟的准确性和相变对残余应力的影响。结果表明，相变对残余应力的影响主要体现在切向次表面。本研究采用了一种新方法来分析微磨削引起的残余应力，并建立了两个降低残余应力的工艺优化标准。这项研究的结果提供了对控制磨削过程的相变和残余应力机制的更全面的了解，