Fatigue strength of laser hardened 42CrMo4 steel considering effects of compressive residual stresses on short crack growth.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25797000%3A_____%2F14%3A%230000483" target="_blank" >RIV/25797000:_____/14:#0000483 - isvavai.cz</a>

Výsledek na webu

<a href="http://http://www.journals.elsevier.com/procedia-engineering" target="_blank" >http://http://www.journals.elsevier.com/procedia-engineering</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.proeng.2014.06.292" target="_blank" >10.1016/j.proeng.2014.06.292</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fatigue strength of laser hardened 42CrMo4 steel considering effects of compressive residual stresses on short crack growth.

Popis výsledku v původním jazyce

The paper contains results of a study aimed at an experimental evaluation of fatigue resistance and initiation mechanisms of heat treated and laser hardened 42CrMo4 steel. Experiments were performed using quite small specimens of 8 x 8 mm cross section,under three point bend fatigue loading. Two different parameters of laser hardening were used, one of them resulted in considerable longitudinal residual stresses - surface speed of laser beam 4 mm/s. Results of fatigue tests of basic reference material,just heat treated, were characteristic by a surprisingly high scatter, particularly in the region near fatigue limit. Fractographical analyses indicated that this scatter was connected with presence of surface or subsurface defects, mostly inclusions, even quite large, which in some cases caused fatigue crack initiation. Compressive residual stresses after the laser treatment, dependent on laser treatment parameters, improved fatigue strength and reduced the scatter, likely due to short

Název v anglickém jazyce

Fatigue strength of laser hardened 42CrMo4 steel considering effects of compressive residual stresses on short crack growth.

Popis výsledku anglicky

The paper contains results of a study aimed at an experimental evaluation of fatigue resistance and initiation mechanisms of heat treated and laser hardened 42CrMo4 steel. Experiments were performed using quite small specimens of 8 x 8 mm cross section,under three point bend fatigue loading. Two different parameters of laser hardening were used, one of them resulted in considerable longitudinal residual stresses - surface speed of laser beam 4 mm/s. Results of fatigue tests of basic reference material,just heat treated, were characteristic by a surprisingly high scatter, particularly in the region near fatigue limit. Fractographical analyses indicated that this scatter was connected with presence of surface or subsurface defects, mostly inclusions, even quite large, which in some cases caused fatigue crack initiation. Compressive residual stresses after the laser treatment, dependent on laser treatment parameters, improved fatigue strength and reduced the scatter, likely due to short

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/FR-TI3%2F814" target="_blank" >FR-TI3/814: Optimalizace laserového povrchového zpracování strojních součástí pro zvýšení jejich užitných vlastností</a><br>

Návaznosti

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

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Procedia Engineering

ISSN

1877-7058

e-ISSN

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Svazek periodika

74

Číslo periodika v rámci svazku

2014

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

4

Strana od-do

417-420

Kód UT WoS článku

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EID výsledku v databázi Scopus

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