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B0695 Mathematical modelling of weld phenomena 4 by H. Cerjak PDF

By H. Cerjak

ISBN-10: 1861250606

ISBN-13: 9781861250605

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J. Keene: International Materials Reviews, 1990, 35,185-216. 9. C. Choo and J. Szekely: Welding Journal Research Supplement, 1992, 71, 77s93s. 10. S. R. Wang: Metallurgical Transactions A, 1986, 17 A, 2265-2270. 11. C. Sheng and Y. Chen: Journal of Engineering Materials and Technology, 1992, 114, 439-449. 12. K. C. B. Strong: presented at the 4rh Int. Conference on Trends in Welding Research, Gatlinburg, TN, June 5-8, 1995. 13. J. Russo, R L. L. Jellison: Welding Journal Research Supplement, 1990, 69, 23s-29s.

E. D. M. A. M. Vitek eds, ASM International, Materials Park, OR, 1987, 53-57. 15. A. A. M. Vitek eds, ASM International, Materials Park, OR, 1993. 16. W. Kreutz and N. Pirch: SPJE Proceedings Series, 1990, 1276, 343-360. 17. U. Dilthey, G. Habendank, T. Reichel, W. Sudnik and A. Iwanow: SchweifJen und Schneiden, 1993,45, 148-153. 18. T. A. M. G. Kraus Welding Journal Research Supplement, 1995, 74, 353s-362s. 19. S. Wu and L. Dorn: Computational Materials Science, 1994, 2, 341-349. 23 Mathematical Modelling of Weld Phenomena 4 20.

The simulation also suggests that some instability takes place during evaporation process. This can be attributed to Kelvin-Helmholtz instability on the melted surface because vapour is flowing through a narrow channel of keyhole with high speed and thus inducing wave on the surface. Thus keyhole is sometimes disconnected in the middle and thus causes bubble trapping inside the melted zone. In this simulation, the each ray has been traced and is reflected at the surface a number. of times. During these reflections, laser beam is absorbed according to HagenRubens formula with incident angle calculated by normal vector of density gradient and the direction of laser at each reflection point.

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B0695 Mathematical modelling of weld phenomena 4 by H. Cerjak


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