Ultrashort laser pulses can be generated in the form of a pulse train. In this paper, the ultrafast phase change processes of a free-standing gold film irradiated by femtosecond laser pulse trains are simulated numerically. A two-temperature model coupled with interface tracking method is developed to describe the ultrafast melting, vaporization, and resolidification processes. To deal with the large span in time scale, variable time steps are adopted. A laser pulse train consists of several pulse bursts with a repetition rate of 0.5–1 MHz. Each pulse burst contains 3–10 pulses with an interval of 50 ps–10 ns. The simulation results show that with such configuration, to achieve the same melting depth, the maximum temperature in the film decreases significantly in comparison to that of a single pulse. Although the total energy depositing on the film will be lifted, more energy will be transferred into the deeper part, instead of accumulating in the subsurface layer. This leads to lower temperature and temperature gradient, which is favorable in laser sintering and laser machining.
Skip Nav Destination
e-mail: zhangyu@missouri.edu
Article navigation
Research Papers
Modeling of Ultrafast Phase Change Processes in a Thin Metal Film Irradiated by Femtosecond Laser Pulse Trains
Jing Huang,
Jing Huang
Department of Mechanical and Aerospace Engineering,
University of Missouri
, Columbia, MO 65211
Search for other works by this author on:
Yuwen Zhang,
Yuwen Zhang
Fellow ASME
Department of Mechanical and Aerospace Engineering,
e-mail: zhangyu@missouri.edu
University of Missouri
, Columbia, MO 65211
Search for other works by this author on:
J. K. Chen,
J. K. Chen
Fellow ASME
Department of Mechanical and Aerospace Engineering,
University of Missouri
, Columbia, MO 65211
Search for other works by this author on:
Mo Yang
Mo Yang
College of Energy and Power Engineering,
University of Shanghai for Science and Technology
, Shanghai 200093, China
Search for other works by this author on:
Jing Huang
Department of Mechanical and Aerospace Engineering,
University of Missouri
, Columbia, MO 65211
Yuwen Zhang
Fellow ASME
Department of Mechanical and Aerospace Engineering,
University of Missouri
, Columbia, MO 65211e-mail: zhangyu@missouri.edu
J. K. Chen
Fellow ASME
Department of Mechanical and Aerospace Engineering,
University of Missouri
, Columbia, MO 65211
Mo Yang
College of Energy and Power Engineering,
University of Shanghai for Science and Technology
, Shanghai 200093, ChinaJ. Heat Transfer. Mar 2011, 133(3): 031003 (8 pages)
Published Online: November 15, 2010
Article history
Received:
April 13, 2009
Revised:
November 25, 2009
Online:
November 15, 2010
Published:
November 15, 2010
Citation
Huang, J., Zhang, Y., Chen, J. K., and Yang, M. (November 15, 2010). "Modeling of Ultrafast Phase Change Processes in a Thin Metal Film Irradiated by Femtosecond Laser Pulse Trains." ASME. J. Heat Transfer. March 2011; 133(3): 031003. https://doi.org/10.1115/1.4002444
Download citation file:
Get Email Alerts
Cited By
Estimation of thermal emission from mixture of CO2 and H2O gases and fly-ash particles
J. Heat Mass Transfer
Non-Classical Heat Transfer and Recent Progress
J. Heat Mass Transfer
Related Articles
An Interfacial Tracking Method for Ultrashort Pulse Laser Melting and Resolidification of a Thin Metal Film
J. Heat Transfer (June,2008)
Three-Dimensional Sintering of Two-Component Metal Powders With
Stationary and Moving Laser Beams
J. Heat Transfer (February,2000)
Heat Transfer During Phase Change of Paraffin Wax Stored in Spherical Shells
J. Sol. Energy Eng (August,2005)
Finite Element Analysis of Pulsed Laser Bending: The Effect of Melting and Solidification
J. Appl. Mech (May,2004)
Related Proceedings Papers
Related Chapters
Numerical Study on Dynamic Charging Performance of Packed Bed Using Spherical Capsules Containing N-Tetradecane
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)
Nuclear Fuel Materials and Basic Properties
Fundamentals of Nuclear Fuel
Numerical Study on Dynamic Discharging Performance of Packed Bed Using Spherical Capsules Containing N-Tetradecane
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)