ROLE OF SURFACE-TENSION DRIVEN CONVECTION IN PULSED-LASER MELTING ANDSOLIDIFICATION

Authors
RAVINDRAN K SRINIVASAN J MARATHE AG
Citation
K. Ravindran et al., ROLE OF SURFACE-TENSION DRIVEN CONVECTION IN PULSED-LASER MELTING ANDSOLIDIFICATION, Proceedings of the Institution of Mechanical Engineers. Part B, Journal of engineering manufacture, 209(1), 1995, pp. 75-82
Citations number
NO
Categorie Soggetti
Engineering, Manufacturing","Engineering, Mechanical
Journal title
Proceedings of the Institution of Mechanical Engineers. Part B, Journal of engineering manufacture → ACNP
ISSN journal
09544054
Volume
209
Issue
1
Year of publication
1995
Pages
75 - 82
Database
ISI
SICI code
0954-4054(1995)209:1<75:ROSDCI>2.0.ZU;2-A
Abstract
Surface melting by a stationary, pulsed laser has been modelled by the finite element method. The role of the surface tension driven convect ion is investigated in detail. Numerical results are presented for a t riangular laser pulse of durations 10, 50 and 200 ms. Though the magni tude of the velocity is high due to the surface tension forces, the pr esent results indicate that a finite time is required for convection t o affect the temperature distribution within the melt pool. The effect of convection is very significant for pulse durations longer than 10 ms.