Thermal input control and enhancement for laser based residual stress measurements using liquid temperature indicating coatings
Abstract
An improved method for measuring residual stress in a material is disclosed comprising the steps of applying a spot of temperature indicating coating to the surface to be studied, establishing a speckle pattern surrounds the spot of coating with a first laser then heating the spot of coating with a far infrared laser until the surface plastically deforms. Comparing the speckle patterns before and after deformation by subtracting one pattern from the other will produce a fringe pattern that serves as a visual and quantitative indication of the degree to which the plasticized surface responded to the stress during heating and enables calculation of the stress. 3 figs.
- Inventors:
- Issue Date:
- Sponsoring Org.:
- USDOE; USDOE, Washington, DC (United States)
- OSTI Identifier:
- 6302314
- Patent Number(s):
- 5920017
- Application Number:
- PPN: US 8-961302
- Assignee:
- Westinghouse Savannah River Co., Aiken, SC (United States)
- DOE Contract Number:
- AC09-89SR18035
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 30 Oct 1997
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; COATINGS; DEFORMATION; LASER RADIATION; MATERIALS TESTING; MEASURING METHODS; RESIDUAL STRESSES; STRESS ANALYSIS; TEMPERATURE CONTROL; CONTROL; ELECTROMAGNETIC RADIATION; RADIATIONS; STRESSES; TESTING; 420500* - Engineering- Materials Testing
Citation Formats
Pechersky, M J. Thermal input control and enhancement for laser based residual stress measurements using liquid temperature indicating coatings. United States: N. p., 1999.
Web.
Pechersky, M J. Thermal input control and enhancement for laser based residual stress measurements using liquid temperature indicating coatings. United States.
Pechersky, M J. Tue .
"Thermal input control and enhancement for laser based residual stress measurements using liquid temperature indicating coatings". United States.
@article{osti_6302314,
title = {Thermal input control and enhancement for laser based residual stress measurements using liquid temperature indicating coatings},
author = {Pechersky, M J},
abstractNote = {An improved method for measuring residual stress in a material is disclosed comprising the steps of applying a spot of temperature indicating coating to the surface to be studied, establishing a speckle pattern surrounds the spot of coating with a first laser then heating the spot of coating with a far infrared laser until the surface plastically deforms. Comparing the speckle patterns before and after deformation by subtracting one pattern from the other will produce a fringe pattern that serves as a visual and quantitative indication of the degree to which the plasticized surface responded to the stress during heating and enables calculation of the stress. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 06 00:00:00 EDT 1999},
month = {Tue Jul 06 00:00:00 EDT 1999}
}
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