Laser Machining of Structural Ceramics: An Integrated Experimental and Numerical Approach for Surface Finish Metadata

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Title

  • Main Title Laser Machining of Structural Ceramics: An Integrated Experimental and Numerical Approach for Surface Finish
  • Series Title UNT Graduate Exhibition

Creator

  • Author: Vora, Hitesh D.
    Creator Type: Personal
    Creator Info: University of North Texas
  • Author: Dahotre, Narendra B.
    Creator Type: Personal
    Creator Info: University of North Texas

Contributor

  • Organizer of meeting: University of North Texas. Toulouse Graduate School.
    Contributor Type: Organization

Date

  • Creation: 2013-03-02

Language

  • English

Description

  • Content Description: Poster awarded first place in the 2013 UNT Graduate Exhibition in the Engineering category. This poster discusses laser machining of structural ceramics and an integrated experimental and numerical approach for surface finish.
  • Physical Description: 1 p.

Subject

  • Keyword: laser machining
  • Keyword: structural ceramics
  • Keyword: COMSOL™ Multiphysics

Source

  • Exhibition: UNT Graduate Exhibition, 2013, Denton, Texas, United States

Collection

  • Name: UNT Scholarly Works
    Code: UNTSW

Institution

  • Name: UNT College of Engineering
    Code: UNTCOE

Rights

  • Rights Access: public

Resource Type

  • Poster

Format

  • Image

Identifier

  • Archival Resource Key: ark:/67531/metadc152429

Degree

  • Academic Department: Materials Science and Engineering

Note

  • Display Note: Abstract: High energy lasers emerged as an innovative and potential industrial tool to fabricate complex shapes on structural ceramics which is otherwise difficult using conventional machining techniques. However, obtaining a desired surface finish at higher material removal rate during laser machining of structural ceramics is still a critical issue. In this situation, the better understanding of various physical phenomena such as heat transfer, fluid flow, recoil pressure, Marangoni convection, and surface tension and its influence on the evolution of typical surface topography during laser machining could be more helpful. In light of this, this study was attempted to present the state of the art of laser machining of alumina using an integrated experimental and computational approach. A multistep computational model based on COMSOL™ Multiphysics was developed to study the effect of various physical phenomena on the generation of surface topography for various laser machining conditions. Furthermore, this process model can be used as a handy tool for the process engineers to configure the process variables (laser power, scanning speed, pulse rate, size of overlap) to obtain the specified quality characteristics. The surface topography of laser machined alumina was measured by an optical profilometer and the results were compared with the computationally predicted topographic parameters with reasonably close agreement.