Modelling of heat transfer and fluid flow in laser welding
Modelling of heat transfer and fluid flow in laser welding
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激光焊接中的传热和流体流动建模
DOI：
10.1002/pamm.200810623
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Kotalík P
中科院分区：
文献类型：
--
作者：
Kotalík P
对脉冲激光焊接过程中含固液相变和表面张力驱动的金属液流动的轴对称二维传热进行了数值研究。我们发现，脉冲调制及时影响温度、熔化锋和流速，这与预期的过冷一起，可能解释了再凝固焊缝的细晶粒结构，具有更好的强度，并且可能没有内部裂纹。（©2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim）
Axisymmetric 2D heat transfer including solid–liquid phase transitions coupled with surface tension driven flow of molten metals is studied numerically for pulsed laser welding. We show that the pulse modulation in time influences the temperature, melting front and flow velocity which, together with the expected undercooling, may explain the fine–grain structure of the resolidified welds that have better strength and, possibly, no cracks inside. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)