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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JL - Fatigue and fracture mechanics

OECD FORD branch

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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

Wear

ISSN

0043-1648

e-ISSN

—

Volume of the periodical

360-361

Issue of the periodical within the volume

AUG

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

147-159

UT code for WoS article

000378666800015

EID of the result in the Scopus database

2-s2.0-84969532308