Thermal Management in Laser Assisted Machining-A Preliminary study

Tien Chien Jen, Rajendra Jadhav, Yau Min Chen, Samih Omari

Research output: Contribution to journalConference articlepeer-review

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 languageEnglish
Pages (from-to)289-296
Number of pages8
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume374
Issue number3
DOIs
Publication statusPublished - 2003
Externally publishedYes
Event2003 ASME International Mechanical Engineering Congress - Washington, DC., United States
Duration: 15 Nov 200321 Nov 2003

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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