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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Fatigue strength of laser hardened 42CrMo4 steel considering effects of compressive residual stresses on short crack growth.
Original language description
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
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JL - Fatigue and fracture mechanics
OECD FORD branch
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Project
<a href="/en/project/FR-TI3%2F814" target="_blank" >FR-TI3/814: Laser surface processing optimization of engineering components for their quality properties enhancement</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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