RESEARCH PAPERS: Heat Transfer in Manufacturing

Surface Ripple in Electron-Beam Welding Solidification

[+] Author and Article Information
P. S. Wei, C. Y. Chang, C. T. Chen

Institute of Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan

J. Heat Transfer 118(4), 960-969 (Nov 01, 1996) (10 pages) doi:10.1115/1.2822595 History: Received January 12, 1996; Revised May 31, 1996; Online December 05, 2007


The occurrence of ripples on the workpiece surface after solidification in electron-beam welding or melting is experimentally and analytically investigated. The maximum accelerating voltage and welding current of the electron-beam welder are 60 kV and 50 mA, respectively, while the workpieces are Al 1100 and SS 304. The average pitches and amplitudes of surface ripples are measured for different beam powers and welding speeds. Using a scale analysis to account for heat transfer and fluid flow induced by a negative temperature-dependent surface tension gradient in the molten pool the variations of ripples with dimensionless beam power, Marangoni, Peclet, Prandtl, Stefan, and Biot numbers are found for the first time. The predicted results show good agreement with experimental data.

Copyright © 1996 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In