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Title: Residual Stress Determination in Thermally Sprayed Coatings – A Comparison of Curvature Models and X-Ray Techniques

Abstract

Residual stresses were calculated from the curvature of coating-substrate coupons using three different models: a simple two-beam elastic model; the Tsui-Clyne progressive deposition model; and the Tsui-Clyne progressive deposition model with substrate plasticity. The coatings studied were metallic and prepared by high-velocity oxy-fuel (HVOF) thermal spraying. The calculated stresses were compared to those measured on the same coupons using x-ray diffraction (XRD) techniques. Coating surface stresses calculated using the two-beam elastic model disagreed with those measured using XRD for coupons with significant curvature. Trends in residual stresses (with varying coating and substrate thickness, substrate material, and HVOF spray particle velocity) predicted by the elastic and elastic-plastic versions of the Tsui-Clyne progressive deposition model agreed with the trends measured by XRD. The magnitudes of stresses calculated using the Tsui-Clyne model agreed with the XRD measurements for coatings sprayed at low particle velocities but were significantly more compressive for coatings sprayed at higher velocities. Accounting for substrate plasticity in the Tsui-Clyne model improved the agreement with the XRD results, but only slightly.

Authors:
;
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - FE
OSTI Identifier:
912309
Report Number(s):
INEEL/JOU-04-02333
Journal ID: ISSN 0257-8972; SCTEEJ; TRN: US200801%%747
DOE Contract Number:  
DE-AC07-99ID-13727
Resource Type:
Journal Article
Resource Relation:
Journal Name: Surface and Coatings Technology; Journal Volume: 200; Journal Issue: 12-13
Country of Publication:
United States
Language:
English
Subject:
36 - MATERIALS SCIENCE; COATINGS; DEPOSITION; PLASTICITY; RESIDUAL STRESSES; SPRAYED COATINGS; STRESSES; SUBSTRATES; THICKNESS; VELOCITY; X-RAY DIFFRACTION; HVOF; Iron Alloys; Residual Stress; Thermal Spray; X-ray Diffraction

Citation Formats

T.C. Totemeier, and J.K. Wright. Residual Stress Determination in Thermally Sprayed Coatings – A Comparison of Curvature Models and X-Ray Techniques. United States: N. p., 2006. Web. doi:10.1016/j.surfcoat.2005.06.003.
T.C. Totemeier, & J.K. Wright. Residual Stress Determination in Thermally Sprayed Coatings – A Comparison of Curvature Models and X-Ray Techniques. United States. doi:10.1016/j.surfcoat.2005.06.003.
T.C. Totemeier, and J.K. Wright. Wed . "Residual Stress Determination in Thermally Sprayed Coatings – A Comparison of Curvature Models and X-Ray Techniques". United States. doi:10.1016/j.surfcoat.2005.06.003.
@article{osti_912309,
title = {Residual Stress Determination in Thermally Sprayed Coatings – A Comparison of Curvature Models and X-Ray Techniques},
author = {T.C. Totemeier and J.K. Wright},
abstractNote = {Residual stresses were calculated from the curvature of coating-substrate coupons using three different models: a simple two-beam elastic model; the Tsui-Clyne progressive deposition model; and the Tsui-Clyne progressive deposition model with substrate plasticity. The coatings studied were metallic and prepared by high-velocity oxy-fuel (HVOF) thermal spraying. The calculated stresses were compared to those measured on the same coupons using x-ray diffraction (XRD) techniques. Coating surface stresses calculated using the two-beam elastic model disagreed with those measured using XRD for coupons with significant curvature. Trends in residual stresses (with varying coating and substrate thickness, substrate material, and HVOF spray particle velocity) predicted by the elastic and elastic-plastic versions of the Tsui-Clyne progressive deposition model agreed with the trends measured by XRD. The magnitudes of stresses calculated using the Tsui-Clyne model agreed with the XRD measurements for coatings sprayed at low particle velocities but were significantly more compressive for coatings sprayed at higher velocities. Accounting for substrate plasticity in the Tsui-Clyne model improved the agreement with the XRD results, but only slightly.},
doi = {10.1016/j.surfcoat.2005.06.003},
journal = {Surface and Coatings Technology},
number = 12-13,
volume = 200,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2006},
month = {Wed Mar 01 00:00:00 EST 2006}
}