The effects of mach number on keyhole shape in high intensity beam welding or drilling

Shih C. Kuo, Peng S. Wei, Tarasankar Debroy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work is to predict collapse of the molten layer surrounding the keyhole filled with vapor and droplets during drilling or high power density beam welding process. Investigating collapse of the liquid layer is essentially required for an understanding of pore formation in keyhole welding. The collapse of the keyhole is similar to transition between the slug and annular two-phase flows encountered in fluid flow field. In this study, a steady, averaged one-dimensional model widely used in two-phase flow areas is provided. The mixture in the core is treated as a homogeneous fluid. For the sake of clarification, friction induced by the liquid layer and energy absorbed by the vapor are neglected. It shows that, in contrast to insensitive effects of subsonic Mach number, the keyhole subject to supersonic Mach number at the base is readily enclosed or collapsed. A fundamental understanding of pore formation is revealed.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME International Manufacturing Science and Engineering Conference 2009, MSEC2009
Pages747-751
Number of pages5
DOIs
StatePublished - Dec 1 2009
EventASME International Manufacturing Science and Engineering Conference 2009, MSEC2009 - West Lafayette, IN, United States
Duration: Oct 4 2009Oct 7 2009

Publication series

NameProceedings of the ASME International Manufacturing Science and Engineering Conference 2009, MSEC2009
Volume1

Other

OtherASME International Manufacturing Science and Engineering Conference 2009, MSEC2009
CountryUnited States
CityWest Lafayette, IN
Period10/4/0910/7/09

All Science Journal Classification (ASJC) codes

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

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  • Cite this

    Kuo, S. C., Wei, P. S., & Debroy, T. (2009). The effects of mach number on keyhole shape in high intensity beam welding or drilling. In Proceedings of the ASME International Manufacturing Science and Engineering Conference 2009, MSEC2009 (pp. 747-751). (Proceedings of the ASME International Manufacturing Science and Engineering Conference 2009, MSEC2009; Vol. 1). https://doi.org/10.1115/MSEC2009-84022