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Forming Mechanism of Bump Shape in Pulsed Laser Melting of Stainless Steel

机译:不锈钢脉冲激光熔化过程中凸点形状的形成机理

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摘要

Laser surface topography has great applications in mechanical, medical, and electrical industries. This paper proposes a mechanism for the shape formation of stainless steel by pulsed laser melting. A 2D axisymmetric finite element model considering the temperature-dependent surface tension is developed, in which the melt flow and free surface deformation are analyzed by using the normal and shear surface forces. The numerical results show that the molten flows toward the place of the greatest surface tension and the free surface deformation are dominated by the shear force (Marangoni effects), generated by the surface tension gradient during heating phase, and the normal stress, generated by the surface tension at the curved suiface during the cooling period.
机译:激光表面形貌在机械,医疗和电气行业中具有广泛的应用。本文提出了一种通过脉冲激光熔化形成不锈钢形状的机理。建立了考虑温度依赖性表面张力的二维轴对称有限元模型,利用法向力和剪切力分析了熔体流动和自由表面变形。数值结果表明,熔体流向最大表面张力和自由表面变形的位置受加热阶段的表面张力梯度产生的剪切力(Marangoni效应)和由热变形产生的法向应力支配。冷却期间弯曲表面的表面张力。

著录项

  • 来源
    《Journal of Heat Transfer》 |2017年第6期|062301.1-062301.10|共10页
  • 作者单位

    School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

    State Key Laboratory of Mechanical System and Vibration, Shanghai, 200240, China;

    School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

    College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;

    School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

    State Key Laboratory of Mechanical System and Vibration, Shanghai, 200240, 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

    surface tension; marangoni effects; molten flow; shape formation; laser melting;

    机译:表面张力;马兰戈尼效应;熔体流动;形状形成;激光熔化;

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