Dynamic impact wear analyses of selected cobalt based HVOF sprayed coatings

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Dynamic impact wear analyses of selected cobalt based HVOF sprayed coatings

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Dynamic impact wear analyses of selected cobalt based HVOF sprayed coatings

Popis výsledku anglicky

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.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/TH75020003" target="_blank" >TH75020003: Vývoj systémů „3D tisk-žárový nástřik“ pro dynamicky a cyklicky namáhané aplikace</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Thermal Spray 2022: Proceedings from the International Thermal Spray Conference

ISSN

0418-9639

e-ISSN

—

Svazek periodika

—

Číslo periodika v rámci svazku

380

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

7

Strana od-do

729-735

Kód UT WoS článku

—

EID výsledku v databázi Scopus

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