Residual Stresses in High-Velocity Oxy-Fuel Metallic Coatings

Journal Article · Tue Jun 01 04:00:00 EDT 2004 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-004-0089-5· OSTI ID:912208

Totemeier, Terry C; Wright, Richard N; Swank, W David

X-ray based residual stress measurements were made on type 316 stainless steel and Fe3A1 coatings that were high-velocity oxy-fuel (HVOF) sprayed onto low-carbon and stainless steel substrates. Nominal coating thicknesses varied from 250 to 1500 mm. The effect of HVOF spray particle velocity on residual stress and deposition efficiency was assessed by preparing coatings at three different torch chamber pressures. The effect of substrate thickness on residual stress was determined by spraying coatings onto thick (6.4 mm) and thin (1.4 mm) substrates. Residual stresses were compressive for both coating materials and increased in magnitude with spray velocity. For coatings applied to thick substrates, near-surface residual stresses were essentially constant with increasing coating thickness. Difference in thermal expansion coefficient between low-carbon and stainless steels led to a 180 MPa difference in residual stress for Fe3A1 coatings. Deposition efficiency for both materials is maximized at an intermediate (~600 m/s) velocity. Considerations for X-ray measurement of residual stresses in HVOF coatings are also presented.

• Research Organization: Idaho National Laboratory (INL)
• Sponsoring Organization: DOE - FE
• DOE Contract Number: AC07-99ID13727
• OSTI ID: 912208
• Report Number(s): INEEL/JOU-03-00876
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 6 Vol. Volume 35A; ISSN 1073-5623
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
COATINGS
DEPOSITION
EFFICIENCY
Fe3A1 coatings
RESIDUAL STRESSES
STAINLESS STEELS
SUBSTRATES
THERMAL EXPANSION
THICKNESS
VELOCITY
high-velocity oxy-fuel
stainless steel substrates