Laser transformation hardening (LTH) based on rapid heating and cooling cycles produce hard and wear-resistant layers of the metallic component. A high intensity moving laser beam heats up the thin layer of the external surface of the component without damaging the bulk of material. The metallurgical transformations taking place in the material during the thermo-kinetic cycles could effectively improve the mechanical properties of its surface. Nowadays, a high power direct diode laser (HPDDL) has been accepted by industry as a valuable tool to carry out this process. A three-dimensional (3-D) transient thermo-kinetic model has been developed to predict the temperature profile of the hardened layers of the material surface. The temperature-dependence of the thermal properties of the material is taken into account in the model. The laser beam is considered as a moving line heat source with a uniform distribution of laser power. The numerical solution is obtained by using a transient 3-D heat conduction equation with convection boundary conditions at the surfaces of the workpiece. A number of experiments have been carried out to harden components of AISI S7 tool steel by a continuous wave (CW) HPDDL at different power levels (1200 W – 2000 W) and different scanning speeds (5 mm/s – 20 mm/s). The main processing parameters such as laser power and scanning speed are optimized based on the numerical analysis of the heat conduction involved in this process. The numerical simulation results are compared with results produced experimentally by a HPDDL laser operating in CW, showing good agreement.
Skip Nav Destination
ASME 2009 International Manufacturing Science and Engineering Conference
October 4–7, 2009
West Lafayette, Indiana, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-4361-1
PROCEEDINGS PAPER
A Three-Dimensional Transient Modeling and Experimental Analysis of Laser Transformation Hardening by Using High Power Direct Diode Laser Available to Purchase
S. Santhanakrishnan,
S. Santhanakrishnan
Southern Methodist University, Dallas, TX
Search for other works by this author on:
F. R. Kong,
F. R. Kong
Southern Methodist University, Dallas, TX
Search for other works by this author on:
R. Kovacevic
R. Kovacevic
Southern Methodist University, Dallas, TX
Search for other works by this author on:
S. Santhanakrishnan
Southern Methodist University, Dallas, TX
F. R. Kong
Southern Methodist University, Dallas, TX
R. Kovacevic
Southern Methodist University, Dallas, TX
Paper No:
MSEC2009-84152, pp. 347-356; 10 pages
Published Online:
September 20, 2010
Citation
Santhanakrishnan, S, Kong, FR, & Kovacevic, R. "A Three-Dimensional Transient Modeling and Experimental Analysis of Laser Transformation Hardening by Using High Power Direct Diode Laser." Proceedings of the ASME 2009 International Manufacturing Science and Engineering Conference. ASME 2009 International Manufacturing Science and Engineering Conference, Volume 1. West Lafayette, Indiana, USA. October 4–7, 2009. pp. 347-356. ASME. https://doi.org/10.1115/MSEC2009-84152
Download citation file:
12
Views
Related Proceedings Papers
Related Articles
Modeling and Experimental Verification of Transient/Residual Stresses and Microstructure Formation in Multi-Layer Laser Aided DMD Process
J. Heat Transfer (July,2006)
Nonlinear Numerical Analysis in Transient Cutting Tool Temperatures
J. Manuf. Sci. Eng (February,2003)
Deposition Pattern Based Thermal Stresses in Single-Layer Laser Aided Direct Material Deposition Process
J. Manuf. Sci. Eng (April,2007)
Related Chapters
Effect of Chromium Content on the On-Cooling Phase Transformations and Induced Prior-β Zr Mechanical Hardening and Failure Mode (in Relation to Enhanced Accident-Tolerant Fuel Chromium-Coated Zirconium-Based Cladding Behavior upon and after High-Temperature Transients)
Zirconium in the Nuclear Industry: 20th International Symposium
Microstructure Evolution and Physics-Based Modeling
Ultrasonic Welding of Lithium-Ion Batteries
Global-Local Multisalce Modelling of Sandwich Structures by Using Arlequin Method
Proceedings of the 2010 International Conference on Mechanical, Industrial, and Manufacturing Technologies (MIMT 2010)