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Title: 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 A
Application Number:
PPN: US 8-961302
Assignee:
Westinghouse Savannah River Co., Aiken, SC (United States) PTO; EDB-99-085574
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 = {1999},
month = {7}
}