Optimization of HVOF Cr3C2-NiCr coating for increased fatigue performance

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F16%3A00008840" target="_blank" >RIV/46747885:24210/16:00008840 - isvavai.cz</a>

Result on the web

<a href="https://api.elsevier.com/content/article/eid/1-s2.0-S0257897216307368" target="_blank" >https://api.elsevier.com/content/article/eid/1-s2.0-S0257897216307368</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfcoat.2016.08.012" target="_blank" >10.1016/j.surfcoat.2016.08.012</a>

Result language

angličtina

Original language name

Optimization of HVOF Cr3C2-NiCr coating for increased fatigue performance

Original language description

Thermally sprayed coatings are strong candidates to be used for replacement of hard chromium - process which is regarded as an environmental risk - in many sliding surfaces for engineering applications such as hydraulic cylinders and aircraft landing gears. Recent advance in thermal spraying technology, based on the increase of the spray particle velocity, has led to improved coating quality. This study focuses on the fatigue performance of structural steel coated with Cr3C2-NiCr coating. Coating has been produced by using high kinetic HVOF thermal spray process. First, the coating was optimized for fatigue purposes by studying the residual stress generation. The optimized coating was selected for deposition of axial fatigue tests specimens, whose fatigue performance was compared to the uncoated steel specimens having different surface treatments (turning, polishing, and shot blasting) relevant for the target applications. The results showed that by using a high kinetic energy coating, the fatigue performance of Cr3C2-NiCr coated structural steel was clearly improved compared to uncoated steel of similar surface quality. Increased fatigue resistance of the coated material was attributed to the substantial compressive residual stresses that hindered crack initiation and that was caused by the high velocity spray particles during the coating process.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20506 - Coating and films

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Surface and Coatings Technology

ISSN

0257-8972

e-ISSN

—

Volume of the periodical

305

Issue of the periodical within the volume

November

Country of publishing house

CH - SWITZERLAND

Number of pages

9

Pages from-to

123-131

UT code for WoS article

000384855100016

EID of the result in the Scopus database

2-s2.0-84981273135