Dynamic impact wear analyses of selected cobalt based HVOF sprayed coatings

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F22%3AN0000033" target="_blank" >RIV/47718684:_____/22:N0000033 - isvavai.cz</a>
Result on the web
<a href="https://dl.asminternational.org/itsc/proceedings-abstract/ITSC%202022/84369/729/22180" target="_blank" >https://dl.asminternational.org/itsc/proceedings-abstract/ITSC%202022/84369/729/22180</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.31399/asm.cp.itsc2022p0729" target="_blank" >10.31399/asm.cp.itsc2022p0729</a>

Result language
angličtina
Original language name
Dynamic impact wear analyses of selected cobalt based HVOF sprayed coatings
Original language description
Impact testing appears as a most promising tool for gaining information on coating behavior in load-bearing applications. During dynamic impact test an indenter impacts successively the surface of the coating with constant force and frequency. The deformation of the coated specimen during impact testing is affected by the mechanical properties of both the substrate and the coating. Varying the impact load and the number of impacts, the evolution of coating surface deformation and contact fatigue failures can be observed. In the paper, the influence of dynamic impact load and number of impacts on the resulting impact crater volume and morphology is analysed, and the interpretation of the results in form of Wohler-like dependance is suggested and demonstrated on two types of HVOF sprayed Co-based alloy coatings. The low-number impact craters evolution and subsurface cracks propagation of HVOF sprayed Co-based alloy coatings is analyzed in more detail, by means of 3D optical microscopy and SEM. The results showed, that the higher ability to deform plastically increased the coatings dynamic impact fatigue lifetime. The cracks, responsible for coatings destruction, spread predominantly along the intersplat boundaries in the pile-up area.
Czech name
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Czech description
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Project
<a href="/en/project/TH75020003" target="_blank" >TH75020003: Development of “3D print-thermal spray” systems for dynamically and cyclically loaded applications</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical
Thermal Spray 2022: Proceedings from the International Thermal Spray Conference
ISSN
0418-9639
e-ISSN
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Volume of the periodical
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Issue of the periodical within the volume
380
Country of publishing house
DE - GERMANY
Number of pages
7
Pages from-to
729-735
UT code for WoS article
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EID of the result in the Scopus database
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