Surface integrity determination of aluminum plates using laser-generated Lamb waves

T  Pramila; Rashmi Shukla; N N  Kishore  and V Raghuram

doi:10.17485/ijst/2010/v3i3.7

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Surface integrity determination of aluminum plates using laser-generated Lamb waves

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Indian Journal of Science and Technology

DOI: 10.17485/ijst/2010/v3i3.7

Year: 2010, Volume: 3, Issue: 3, Pages: 231-234

Original Article

Surface integrity determination of aluminum plates using laser-generated Lamb waves

T. Pramila, Rashmi Shukla, N.N. Kishore¹ and V.Raghuram^1*

Department of Physics, Christ Church College, Kanpur-208001, India
¹ Indian Institute of Technology Kanpur Kanpur-208016, India
[email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Laser based ultrasonics is an important method in non-destructive testing for material characterization and process control. This paper describes the generation and characterization of Lamb waves in a thin aluminum plate-using laser based ultrasonics. Nd: YAG laser is used for ultrasonic generation and He-Ne Laser Heterodyne Interferometer is used for detection. Laser generation of Lamb waves leads to simultaneous generation of various frequency component as well as multiple Lamb wave modes. The surface integrity of a thin aluminium plate is studied.
Keywords: Lamb waves, Laser Generation, surface integrity