Influence of Case Hardening on Fatigue Resistance of Models of Hollow Shafts with Production Surface Defects

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25797000%3A_____%2F11%3A%230000281" target="_blank" >RIV/25797000:_____/11:#0000281 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.scientific.net/KEM.465.243" target="_blank" >http://www.scientific.net/KEM.465.243</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.465.243" target="_blank" >10.4028/www.scientific.net/KEM.465.243</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of Case Hardening on Fatigue Resistance of Models of Hollow Shafts with Production Surface Defects

Popis výsledku v původním jazyce

This work analyses an influence of case hardening on fatigue resistance of models of hollow shafts which have a variable diameter ranging from 40 mm to 67 mm, wall thickness of 7 mm and production surface defects on an inner surface layer of the hollow shafts. Case hardened (on both sides) and non case hardened shafts were tested. Both types of shafts were made out of 16MnCrS5 (DIN) steel by cold reduction rolling and were subjected to a flat bending. Tests indicated that the fatigue resistance of the case hardened shafts was significantly higher. The main reason for the lower resistance of the non case hardened shafts was initiation of main cracks from the defects on inner surfaces. In case of the case hardened shafts the main cracks initiated from the notch on outer surfaces where macroscopic stress was maximal. Different mechanisms of the cracking are discussed from the point of view of compressive residual stresses in the case hardened layer.

Název v anglickém jazyce

Influence of Case Hardening on Fatigue Resistance of Models of Hollow Shafts with Production Surface Defects

Popis výsledku anglicky

This work analyses an influence of case hardening on fatigue resistance of models of hollow shafts which have a variable diameter ranging from 40 mm to 67 mm, wall thickness of 7 mm and production surface defects on an inner surface layer of the hollow shafts. Case hardened (on both sides) and non case hardened shafts were tested. Both types of shafts were made out of 16MnCrS5 (DIN) steel by cold reduction rolling and were subjected to a flat bending. Tests indicated that the fatigue resistance of the case hardened shafts was significantly higher. The main reason for the lower resistance of the non case hardened shafts was initiation of main cracks from the defects on inner surfaces. In case of the case hardened shafts the main cracks initiated from the notch on outer surfaces where macroscopic stress was maximal. Different mechanisms of the cracking are discussed from the point of view of compressive residual stresses in the case hardened layer.

Druh

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

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

<a href="/cs/project/1M06032" target="_blank" >1M06032: VÝZKUMNÉ CENTRUM TVÁŘECÍCH TECHNOLOGIÍ</a><br>

Návaznosti

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

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Key Engineering Materials

ISSN

1013-9826

e-ISSN

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Svazek periodika

465

Číslo periodika v rámci svazku

—

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

4

Strana od-do

243-246

Kód UT WoS článku

000291704700054

EID výsledku v databázi Scopus

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