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首页> 外文期刊>International Journal of Heat and Mass Transfer >A FEM model for simulating temperature field in coaxial laser cladding of TI6AL4V alloy using an inverse modeling approach
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A FEM model for simulating temperature field in coaxial laser cladding of TI6AL4V alloy using an inverse modeling approach

机译：用逆建模方法模拟TI6AL4V合金同轴激光熔覆中温度场的有限元模型

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摘要

In this paper, a 3D thermal finite element (FE) model is built for the simulation of temperature field in the laser cladding of Ti6A14V (TC4) alloy. Instead of directly acquiring the geometric parameters of cladding layer and heat source for a concrete FE simulation through the measured data in experiments, this model is able to achieve temperature distributions for laser cladding with varying combinations of process parameters by constructing an adaptive cladding layer and moving heat source model using an inverse modeling approach. First, correlation experiments of single-track laser cladding TC4 powder on TC4 substrate were carried out based on central composite design (CCD) with the cladding parameters, laser power (400-600 W), scanning speed (500-700 mm/min) and powder feed rate (30-60 rev/min). Then the relationships between process parameters and the geometries of cladding layer as well as the radius of spherical heat source are derived via regression analysis as an inverse manner. In addition, the spherical heat source is originally employed in the FE thermal simulation of coaxial laser cladding process. Detailed 3D transient thermal analyses have been performed with temperature-dependent material properties and the calibration of heat source is also provided. The proposed model is validated by the numerical and experimental results. It is found that it has potential to be applied in the thermal simulation of laser cladding with varying process parameters, considering the variation of the characteristic dimensions of deposition bead and the heat source.
机译：本文建立了一个3D热有限元（FE）模型来模拟Ti6A14V（TC4）合金激光熔覆中的温度场。该模型无需通过实验中的测量数据直接获取用于混凝土有限元模拟的包层和热源的几何参数，而是能够通过构建自适应包层并移动来获得具有不同工艺参数组合的激光包层的温度分布使用逆建模方法对热源进行建模。首先，基于中心复合设计（CCD），以包层参数，激光功率（400-600 W），扫描速度（500-700 mm / min）为基础，在TC4基板上进行了单轨激光熔覆TC4粉末的相关性实验。和粉末进料速度（30-60转/分钟）。然后通过回归分析以相反的方式得出了工艺参数与熔覆层的几何形状以及球形热源半径之间的关系。另外，球形热源最初用于同轴激光熔覆过程的有限元热模拟中。详细的3D瞬态热分析已经进行了与温度相关的材料属性，并且还提供了热源的校准。数值和实验结果验证了所提模型的有效性。考虑到沉积珠和热源的特征尺寸的变化，发现它有潜力在变化工艺参数的激光熔覆热模拟中应用。

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  • 作者

    Mingzhong Hao; Yuwen Sun;

  • 作者单位

    Key Laboratory for Precision and Non-Traditional Machining Technology of the Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China;

    Key Laboratory for Precision and Non-Traditional Machining Technology of the Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China;

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

    User cladding; Finite element; Temperature field; Regression analysis;

    机译：用户立面;有限元;温度场回归分析;

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