Acoustic emission response of soda lime glass after a single Nd-YAG laser pulse

Journal Article · Thu Sep 01 00:00:00 EDT 1994 · Journal of Laser Applications; (United States)

DOI:https://doi.org/10.2351/1.4745351· OSTI ID:6932378

Harrysson, R; Vomacka, P ^[1]

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1. Luleaa Univ. of Technology (Sweden). Dept. of Engineering Materials

When machining brittle solids with a laser, crack formation can occur in the material around the irradiated area causing a strength reduction of the machined material. The purpose of this work was to study a well known brittle material (soda lime glass) by means of acoustic emission (AE) in order to investigate the correlation between visually observed crack formation and detected AE energy released by the crack formation in the material. During and after irradiation of soda lime glass with an Nd-YAG laser pulse, the number of hits and amount of AE energy were measured in irradiation with a single Nd-YAG laser pulse. The power of the detected signal is related to the amount of crack formation. Cracks can be minimized or avoided by choosing a suitable combination of pulse time and power density of the single laser pulse. The cracks which occur after a laser shot extend mainly in the radial direction from the irradiated area.

• OSTI ID: 6932378
• Journal Information: Journal of Laser Applications; (United States), Vol. 6:3; ISSN 1042-346X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
GLASS
ACOUSTIC EMISSION TESTING
CRACK PROPAGATION
LASER BEAM MACHINING
EXPERIMENTAL DATA
NEODYMIUM LASERS
ACOUSTIC TESTING
DATA
INFORMATION
LASERS
MACHINING
MATERIALS TESTING
NONDESTRUCTIVE TESTING
NUMERICAL DATA
SOLID STATE LASERS
TESTING
360601* - Other Materials- Preparation & Manufacture
360603 - Materials- Properties
420500 - Engineering- Materials Testing