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首页> 外文期刊>Finite elements in analysis & design >Part scale estimation of residual stress development in laser powder bed fusion additive manufacturing of Inconel 718
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Part scale estimation of residual stress development in laser powder bed fusion additive manufacturing of Inconel 718

机译：激光粉床融合添加剂制造中剩余应力发育的零件规模估计718

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Residual stress has been among the primary problems in the laser powder bed fusion (LPBF) additive manufacturing. Nevertheless, complex physics and multi-scale nature of the problem make an accurate prediction of residual stress at the part level a great challenge. Thus, the present study developed the finite element framework to predict the part scale residual stress development in the LPBF of Inconel 718. Two-scale models were used coherently. A mesoscale model calculated the stress formation in a deposited powder layer by considering the influence of process conditions and scan strategies. Subsequently, the inherent strain approach was used for the part level prediction. The inherent strain values were estimated according to numerical results from the mesoscale model. Numerical validation was made by comparing the transient development of residual stress with reported measurements from the neutron diffraction of over 200 data points. The proposed framework provided the prediction which matched excellently with experimental results. Ultimately, the present study established the proven framework which could be used for further investigation on part scale-related issues in the LPBF process.
机译：残余应力一直是激光粉末融合（LPBF）添加剂制造中的主要问题。然而，复杂的物理和多规模性质的问题可以准确地预测部分级别的群体挑战。因此，本研究开发了有限元框架，以预测Inconel 718的LPBF中的部分刻度残余应力显影。两种尺度模型连贯使用。 Messcale模型通过考虑过程条件和扫描策略的影响，计算沉积的粉末层中的应力形成。随后，使用固有的应变方法用于部分级别预测。根据来自Messcale模型的数值结果估计固有的应变值。通过比较来自200多个数据点的中子衍射的报告测量的残余应力的瞬态发展来进行数值验证。所提出的框架提供了与实验结果相匹配的预测。最终，本研究建立了经过验证的框架，可用于进一步调查LPBF过程中的部分比例相关问题。

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