Surface Ripple in Electron-Beam Welding Solidification-Reference-Cited by-同舟云学术

Surface Ripple in Electron-Beam Welding Solidification

Published:1996-11-01 Issue:4 Volume:118 Page:960-969
ISSN:0022-1481
Container-title:Journal of Heat Transfer
language:en
Short-container-title:

Author:

Wei P. S.¹,Chang C. Y.¹,Chen C. T.¹

Affiliation:

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

Abstract

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.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/heattransfer/article-pdf/118/4/960/5911190/960_1.pdf

Reference28 articles.

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2. Arata Y. , MatsudaF., and MurakamiT., 1973, “Some Dynamic Aspects of Weld Molten Metal in Electron Beam Welding,” Transactions of Japan Welding Research Institute, Vol. 2, pp. 23–32.

3. Bejan, A., 1984, Convective Heat Transfer, Wiley, New York, Chap. 2.

4. Burgardt, P., 1986, “Electron Beam Beam Size Calibration,” Summary of Calibration of Welding Systems Meeting, L. N. Tallerico, ed., Sandia National Lab., Livermore, CA, Feb., pp. 258–266.

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