Scholarlink

<p>To investigate the thermo-fluid-structural coupling mechanism during laser cladding, this study developed a numerical model to simulate the transient evolution of temperature, flow, and thermal stress fields. The model captures residual stress distribution patterns in the cladding layer and substrate, reveals multi-physics coupling dynamics, and analyzes molten pool solidification behavior. Experimental validation involved laser cladding of IN718 alloy to study microstructural evolution and elemental distribution. Results showed that at 1.2&#xa0;s, the molten pool reached peak values: 2342&#xa0;K temperature, 0.0125&#xa0;m/s flow velocity, and 533&#xa0;MPa thermal stress. The top region exhibited a temperature gradient (G) one-third of the bottom’s, while its solidification rate (R) was five times higher. The model’s reliability was confirmed by comparing simulated microstructures with experimental observations. Temperature, flow, and stress fields dynamically interact, jointly determining cladding quality and residual stress distribution. This research clarifies the intrinsic relationship between multi-physics coupling mechanisms and cladding performance, providing theoretical foundations for optimizing process parameters to enhance material properties. The findings offer critical insights for precise control of laser cladding processes and improvement of cladding layer performance.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Multi-physics Investigation of Thermal-Fluid Mechanical Interaction during Laser Cladding Process of IN718 on 2520

  • 期刊论文

  • 发表日期：

    2026年1月29日

查看全文
  • Wenqiang Song,
  • Quanwei Cui,
  • Wanli Guo,
  • Wei Xiong,
  • Fengsheng Yu

摘要

To investigate the thermo-fluid-structural coupling mechanism during laser cladding, this study developed a numerical model to simulate the transient evolution of temperature, flow, and thermal stress fields. The model captures residual stress distribution patterns in the cladding layer and substrate, reveals multi-physics coupling dynamics, and analyzes molten pool solidification behavior. Experimental validation involved laser cladding of IN718 alloy to study microstructural evolution and elemental distribution. Results showed that at 1.2 s, the molten pool reached peak values: 2342 K temperature, 0.0125 m/s flow velocity, and 533 MPa thermal stress. The top region exhibited a temperature gradient (G) one-third of the bottom’s, while its solidification rate (R) was five times higher. The model’s reliability was confirmed by comparing simulated microstructures with experimental observations. Temperature, flow, and stress fields dynamically interact, jointly determining cladding quality and residual stress distribution. This research clarifies the intrinsic relationship between multi-physics coupling mechanisms and cladding performance, providing theoretical foundations for optimizing process parameters to enhance material properties. The findings offer critical insights for precise control of laser cladding processes and improvement of cladding layer performance.