Physical Effects of Multipass Two-Dimensional Laser Machining of Structural Ceramics

Effect of multiple laser passes on cavities machined in structural ceramics is presented. Multiple laser passes machined cavities with reduced thermal stresses and cracks. Thermal model based on temperature dependent absorptivity and thermophysical properties along with defocusing of laser beam, mul...

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Bibliographic Details
Published in:Advanced engineering materials 2009-07, Vol.11 (7), p.579-585
Main Authors: Samant, Anoop N., Dahotre, Narendra B.
Format: Article
Language:English
Subjects:
absorptivity
beam defocusing
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
laser machining
Materials science
Materials synthesis
materials processing
Physics
preheating
structural ceramics
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Summary:Effect of multiple laser passes on cavities machined in structural ceramics is presented. Multiple laser passes machined cavities with reduced thermal stresses and cracks. Thermal model based on temperature dependent absorptivity and thermophysical properties along with defocusing of laser beam, multiple track induced preheating effect, and heat transfer was developed to incorporate effect of multiple passes on machined cavity. Predicted and experimentally measured values of physical attributes showed decent match.
ISSN:1438-1656
1527-2648
DOI:10.1002/adem.200900056