Abstract
The use of laser in manufacturing has gained considerable attention recently. In non-reactive processes, the laser beam is used either to machine, to weld, or to modify the target material structure by local heating. In addition to elevating the surface temperature of the target, this local heating may significantly alter the material crystalline structure; change its phase, and thus the electrical, mechanical and thermal properties. For reliability and consistency, it is necessary to control effectively the laser-based manufacturing processes. Specifically, the induced micro-structural changes due to the heat transfer mechanisms have to be analyzed. Most importantly, the thermal effect on the sub-surface microstructures and the generated thermal stress distribution need to be well quantified. The application of lasers in manufacturing has distinctive advantage when dealing with ceramic material. The use of advanced ceramics has doubled in the past ten years, and is expected to grow at an even faster pace in the new millennium. The superior properties, such as low weight, high temperature strength and wear/corrosion resistance, of these structural ceramics make them the preferred materials in various applications including bearings, rollers/followers, valves, engines, cutting tools and even artificial joints in the human body. The major goal of this study is to develop an innovative laser-assisted drilling process through innovative tool design and cooling method. A preliminary investigation of the effect of donut-shaped laser heat input on the temperature distribution in the workpiece is studied numerically and experimentally.
Original language | English |
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Pages (from-to) | 289-296 |
Number of pages | 8 |
Journal | American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD |
Volume | 374 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2003 |
Externally published | Yes |
Event | 2003 ASME International Mechanical Engineering Congress - Washington, DC., United States Duration: 15 Nov 2003 → 21 Nov 2003 |
ASJC Scopus subject areas
- Mechanical Engineering
- Fluid Flow and Transfer Processes