Purpose

This paper aims to propose an analytical thermal three-dimensional model that allows an efficient evaluation of the thermal effect of the laser-scanning path. During manufacturing by laser powder bed fusion (LPBF), the laser-scanning path influences the thermo-mechanical behavior of parts. Therefore, it is necessary to validate the path generation considering the thermal behavior induced by this process to improve the quality of parts.

Design/methodology/approach

The proposed model, based on the effect of successive thermal flashes along the scanning path, is calibrated and validated by comparison with thermal results obtained by FEM software and experimental measurements. A numerical investigation is performed to compare different scanning path strategies on the Ti6Al4V material with different stimulation parameters.

Findings

The simulation results confirm the effectiveness of the approach to simulate the thermal field to validate the scanning strategy. It suggests a change in the scale of simulation thanks to high-performance computing resources.

Originality/value

The flash-based approach is designed to ensure the quality of the simulated thermal field while minimizing the computational cost.

中文翻译：

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LPBF 增材制造中扫描路径的基于闪光的热模拟

目的

本文旨在提出一种分析热三维模型，可以有效评估激光扫描路径的热效应。在激光粉末床融合 (LPBF) 制造过程中，激光扫描路径会影响零件的热机械行为。因此，有必要考虑由该过程引起的热行为来验证路径生成，以提高零件质量。

设计/方法/方法

所提出的模型基于沿扫描路径的连续热闪光的影响，通过与 FEM 软件和实验测量获得的热结果进行比较来校准和验证。进行数值研究以比较具有不同刺激参数的 Ti6Al4V 材料的不同扫描路径策略。

发现

仿真结果证实了该方法模拟热场以验证扫描策略的有效性。由于高性能计算资源，它表明模拟规模发生了变化。

原创性/价值

基于闪存的方法旨在确保模拟热场的质量，同时最小化计算成本。