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Analytical solutions for rapid prediction of transient temperature field in powder-fed laser directed energy deposition based on different heat source models

机译：基于不同热源模型的粉末馈电激光引导能量沉积瞬态温度场快速预测的分析解

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摘要

The present paper aims to develop an effective analytical solution for laser directed energy deposition through powder feeding (LDED-PF). Three heat source models are introduced and compared to analytically describe the transient temperature field in the process. These models are known as point (ID) heat source, circular (2D) heat source, and semi-spherical (3D) heat source. For the validation tests, single-track deposition of Ti-5Al-5 V-5Mo-3Cr powder on Ti-6Al-4 V substrate is conducted at different laser powers, scanning speeds, and powder feed rates. The temperature field is validated using the measurement of melt-pool/deposit geometry. In order to improve the model fidelity, the enhanced thermal diffusivity and heat source radius are calibrated in terms of linear functions. It is found that the 2D Gaussian heat source model, which is in agreement with the underlying physics of the process, establishes a better match between the predicted and experimental data. The developed model only needs the basic information from the LDED-PF setup and material thermal properties to predict the thermal history and melt-pool geometry at different processing parameters.
机译：本文旨在通过粉末进料（LdEd-PF）开发激光定向能量沉积的有效分析解决方案。引入三种热源模型并进行比较，以分析过程中的瞬态温度场。这些模型称为点（ID）热源，圆形（2D）热源和半球形（3D）热源。对于验证测试，在Ti-6AL-4 V衬底上的Ti-5Al-5V-5MO-3CR粉末的单轨沉积在不同的激光功率，扫描速度和粉末进料速率下进行。使用熔融池/沉积几何体测量验证温度场。为了提高模型保真度，在线函数方面校准增强的热漫射和热源半径。结果发现，与过程的基础物理学一致的2D高斯热源模型建立了预测和实验数据之间的更好匹配。开发的模型只需要来自LdED-PF设置和材料热性质的基本信息，以预测不同处理参数的热历史和熔融池几何形状。

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  • 来源
    《Applied Physics》 |2021年第6期|445.1-445.14|共14页
  • 作者

    M. Ansari; M. Khamooshi; Y. Huang; E. Toyserkani;

  • 作者单位

    Multi-Scale Additive Manufacturing (MSAM) Lab Department of Mechanical and Mechatronics Engineering University of Waterloo Waterloo ON N2L 3G1 Canada;

    Department of Mechanical and Mechatronics Engineering University of Waterloo Waterloo ON N2L 3G1 Canada;

    Department of Mechanical Engineering University College London Torrington Place London WC1E 7JE UK;

    Multi-Scale Additive Manufacturing (MSAM) Lab Department of Mechanical and Mechatronics Engineering University of Waterloo Waterloo ON N2L 3G1 Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Metal additive manufacturing; Directed energy deposition; Analytical modeling; Heat source model Transient temperature field; Geometry prediction;

    机译：金属添加剂制造;定向能量沉积;分析建模;热源模型瞬态温度场;几何预测;

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