Integrity of APS, HVOF and HVAF sprayed NiCr and NiCrBSi coatings based on the tensile stress-strain response

Tommi Varis; Aki Mäkelä; Tomi Suhonen; Jussi Laurila; Petri Vuoristo

doi:10.1016/j.surfcoat.2022.129068

Integrity of APS, HVOF and HVAF sprayed NiCr and NiCrBSi coatings based on the tensile stress-strain response

Tommi Varis, Aki Mäkelä, Tomi Suhonen, Jussi Laurila, Petri Vuoristo

Materials Science and Environmental Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

12 Citations (Scopus)

24 Downloads (Pure)

Abstract

The interlamellar cohesion of thermal spray coatings influences greatly their mechanical properties and ability to use coatings in different loading conditions and wear/erosion resistance. In the present study, micro-tensile testing of free-standing coatings was utilized to evaluate the mechanical response of thermally sprayed coatings. In addition, the longitudinal uniaxial fracture strength of free-standing coatings could be determined by a tensile test. The coating materials studied were NiCr and NiCrBSi coatings sprayed by atmospheric plasma spraying (APS), high velocity oxy-fuel (HVOF), and high velocity air-fuel (HVAF) processes. The different materials used for the coatings sprayed by different methods yield different microstructures, different stress-strain relation in tensile testing. Different tensile test response was found to be related to cohesion strength between lamellas, and thus was affecting the cavitation erosion wear. The effect of other factors such as hardness and residual stresses on cavitation resistance were also discussed. Such results are crucial to understand the suitability of microstructures obtained by TS processes for different wear conditions.

Original language	English
Article number	129068
Number of pages	12
Journal	Surface and Coatings Technology
Volume	452
Early online date	25 Nov 2022
DOIs	https://doi.org/10.1016/j.surfcoat.2022.129068
Publication status	Published - 2023
Publication type	A1 Journal article-refereed

Keywords

APS
Cavitation erosion
Fracture strength
Fracture surface
HVAF
HVOF
Lamella cohesion
Micro-tensile testing
Self-fluxing alloy
Thermal spray coatings

Publication forum classification

Publication forum level 2

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.surfcoat.2022.129068Licence: CC BY

Integrity of APS, HVOFFinal published version, 10.4 MBLicence: CC BY

https://urn.fi/URN:NBN:fi:tuni-202301181504Licence: CC BY

Cite this

@article{10a1bcf6647e4447b224f4fc0d5cf7bd,

title = "Integrity of APS, HVOF and HVAF sprayed NiCr and NiCrBSi coatings based on the tensile stress-strain response",

abstract = "The interlamellar cohesion of thermal spray coatings influences greatly their mechanical properties and ability to use coatings in different loading conditions and wear/erosion resistance. In the present study, micro-tensile testing of free-standing coatings was utilized to evaluate the mechanical response of thermally sprayed coatings. In addition, the longitudinal uniaxial fracture strength of free-standing coatings could be determined by a tensile test. The coating materials studied were NiCr and NiCrBSi coatings sprayed by atmospheric plasma spraying (APS), high velocity oxy-fuel (HVOF), and high velocity air-fuel (HVAF) processes. The different materials used for the coatings sprayed by different methods yield different microstructures, different stress-strain relation in tensile testing. Different tensile test response was found to be related to cohesion strength between lamellas, and thus was affecting the cavitation erosion wear. The effect of other factors such as hardness and residual stresses on cavitation resistance were also discussed. Such results are crucial to understand the suitability of microstructures obtained by TS processes for different wear conditions.",

keywords = "APS, Cavitation erosion, Fracture strength, Fracture surface, HVAF, HVOF, Lamella cohesion, Micro-tensile testing, Self-fluxing alloy, Thermal spray coatings",

author = "Tommi Varis and Aki M{\"a}kel{\"a} and Tomi Suhonen and Jussi Laurila and Petri Vuoristo",

note = "Funding Information: The research was funded by Academy of Finland , project “Enabling phenomena behind multihierarchical strengthening of high kinetic sprayed metallic coatings” (HIERARCH, Decision NUM: 318064 ). Authors would like to thank Anssi Mets{\"a}honkala and Jarkko Lehti from Tampere University, Thermal Spray Center Finland (TSCF), Tampere, Finland, for spraying the coatings and Jorma Vihinen from Tampere University, Tampere, Finland, for laser cutting the specimens. We would also like to thank Asta Nurmela and Vilma Ratia from VTT for their work in conducting the miniature tensile testing. Funding Information: The research was funded by Academy of Finland, project “Enabling phenomena behind multihierarchical strengthening of high kinetic sprayed metallic coatings” (HIERARCH, Decision NUM: 318064). Authors would like to thank Anssi Mets{\"a}honkala and Jarkko Lehti from Tampere University, Thermal Spray Center Finland (TSCF), Tampere, Finland, for spraying the coatings and Jorma Vihinen from Tampere University, Tampere, Finland, for laser cutting the specimens. We would also like to thank Asta Nurmela and Vilma Ratia from VTT for their work in conducting the miniature tensile testing. Publisher Copyright: {\textcopyright} 2022",

year = "2023",

doi = "10.1016/j.surfcoat.2022.129068",

language = "English",

volume = "452",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

publisher = "Elsevier",

}

TY - JOUR

T1 - Integrity of APS, HVOF and HVAF sprayed NiCr and NiCrBSi coatings based on the tensile stress-strain response

AU - Varis, Tommi

AU - Mäkelä, Aki

AU - Suhonen, Tomi

AU - Laurila, Jussi

AU - Vuoristo, Petri

N1 - Funding Information: The research was funded by Academy of Finland , project “Enabling phenomena behind multihierarchical strengthening of high kinetic sprayed metallic coatings” (HIERARCH, Decision NUM: 318064 ). Authors would like to thank Anssi Metsähonkala and Jarkko Lehti from Tampere University, Thermal Spray Center Finland (TSCF), Tampere, Finland, for spraying the coatings and Jorma Vihinen from Tampere University, Tampere, Finland, for laser cutting the specimens. We would also like to thank Asta Nurmela and Vilma Ratia from VTT for their work in conducting the miniature tensile testing. Funding Information: The research was funded by Academy of Finland, project “Enabling phenomena behind multihierarchical strengthening of high kinetic sprayed metallic coatings” (HIERARCH, Decision NUM: 318064). Authors would like to thank Anssi Metsähonkala and Jarkko Lehti from Tampere University, Thermal Spray Center Finland (TSCF), Tampere, Finland, for spraying the coatings and Jorma Vihinen from Tampere University, Tampere, Finland, for laser cutting the specimens. We would also like to thank Asta Nurmela and Vilma Ratia from VTT for their work in conducting the miniature tensile testing. Publisher Copyright: © 2022

PY - 2023

Y1 - 2023

N2 - The interlamellar cohesion of thermal spray coatings influences greatly their mechanical properties and ability to use coatings in different loading conditions and wear/erosion resistance. In the present study, micro-tensile testing of free-standing coatings was utilized to evaluate the mechanical response of thermally sprayed coatings. In addition, the longitudinal uniaxial fracture strength of free-standing coatings could be determined by a tensile test. The coating materials studied were NiCr and NiCrBSi coatings sprayed by atmospheric plasma spraying (APS), high velocity oxy-fuel (HVOF), and high velocity air-fuel (HVAF) processes. The different materials used for the coatings sprayed by different methods yield different microstructures, different stress-strain relation in tensile testing. Different tensile test response was found to be related to cohesion strength between lamellas, and thus was affecting the cavitation erosion wear. The effect of other factors such as hardness and residual stresses on cavitation resistance were also discussed. Such results are crucial to understand the suitability of microstructures obtained by TS processes for different wear conditions.

AB - The interlamellar cohesion of thermal spray coatings influences greatly their mechanical properties and ability to use coatings in different loading conditions and wear/erosion resistance. In the present study, micro-tensile testing of free-standing coatings was utilized to evaluate the mechanical response of thermally sprayed coatings. In addition, the longitudinal uniaxial fracture strength of free-standing coatings could be determined by a tensile test. The coating materials studied were NiCr and NiCrBSi coatings sprayed by atmospheric plasma spraying (APS), high velocity oxy-fuel (HVOF), and high velocity air-fuel (HVAF) processes. The different materials used for the coatings sprayed by different methods yield different microstructures, different stress-strain relation in tensile testing. Different tensile test response was found to be related to cohesion strength between lamellas, and thus was affecting the cavitation erosion wear. The effect of other factors such as hardness and residual stresses on cavitation resistance were also discussed. Such results are crucial to understand the suitability of microstructures obtained by TS processes for different wear conditions.

KW - APS

KW - Cavitation erosion

KW - Fracture strength

KW - Fracture surface

KW - HVAF

KW - HVOF

KW - Lamella cohesion

KW - Micro-tensile testing

KW - Self-fluxing alloy

KW - Thermal spray coatings

U2 - 10.1016/j.surfcoat.2022.129068

DO - 10.1016/j.surfcoat.2022.129068

M3 - Article

AN - SCOPUS:85142750736

SN - 0257-8972

VL - 452

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

M1 - 129068

ER -

Integrity of APS, HVOF and HVAF sprayed NiCr and NiCrBSi coatings based on the tensile stress-strain response

Abstract

Keywords

Publication forum classification

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this