Damage initiation and evolution in silicon nitride undernnon-conforming lubricated hybrid rolling contact

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F16%3A00466901" target="_blank" >RIV/68081723:_____/16:00466901 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/http://dx.doi.org/10.1016/j.wear.2016.05.005" target="_blank" >http://dx.doi.org/http://dx.doi.org/10.1016/j.wear.2016.05.005</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/http://dx.doi.org/10.1016/j.wear.2016.05.005" target="_blank" >http://dx.doi.org/10.1016/j.wear.2016.05.005</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Damage initiation and evolution in silicon nitride undernnon-conforming lubricated hybrid rolling contact

Popis výsledku v původním jazyce

This study focuses on the damage mechanisms in silicon nitride rolling elements used in hybrid (ceramic–metal) bearings that operate under non-conformal contact. To get an insight into the prevailing damage modes compared to the real application, a rolling contact experiment was designed to mimic the contact conditions. Hertzian contact pressures ranged from 3.0 to 5.9 GPa (500–4150 N). In order to approach pure rolling, the experiments were run without inducing any gross slip. Extensive surface and subsurface damage analysis was performed using conventional ceramography as well as FIB cross-sectioning. Finite element simulations were carried out to illustrate the stress state prevailing under different loading conditions. Surface damage to rollers subjected to contact pressures up to 5.1 GPa (2500 N) was mainly dominated by micro-spalling, which was induced due to the presence of snowflake structures. At the highest applied loads, damage appeared as a combination of macro-cracking and micro-spalling. Crack propagation was attributed to different mechanisms: (a) fatigue-induced fracture and (b) lubricant-driven crack propagation in the subsurface.

Název v anglickém jazyce

Damage initiation and evolution in silicon nitride undernnon-conforming lubricated hybrid rolling contact

Popis výsledku anglicky

This study focuses on the damage mechanisms in silicon nitride rolling elements used in hybrid (ceramic–metal) bearings that operate under non-conformal contact. To get an insight into the prevailing damage modes compared to the real application, a rolling contact experiment was designed to mimic the contact conditions. Hertzian contact pressures ranged from 3.0 to 5.9 GPa (500–4150 N). In order to approach pure rolling, the experiments were run without inducing any gross slip. Extensive surface and subsurface damage analysis was performed using conventional ceramography as well as FIB cross-sectioning. Finite element simulations were carried out to illustrate the stress state prevailing under different loading conditions. Surface damage to rollers subjected to contact pressures up to 5.1 GPa (2500 N) was mainly dominated by micro-spalling, which was induced due to the presence of snowflake structures. At the highest applied loads, damage appeared as a combination of macro-cracking and micro-spalling. Crack propagation was attributed to different mechanisms: (a) fatigue-induced fracture and (b) lubricant-driven crack propagation in the subsurface.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Wear

ISSN

0043-1648

e-ISSN

—

Svazek periodika

360-361

Číslo periodika v rámci svazku

AUG

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

147-159

Kód UT WoS článku

000378666800015

EID výsledku v databázi Scopus

2-s2.0-84969532308