Evaluation of fatigue strength of heat treated and laser hardened 42CrMo4 steel considering localized initiation mechanisms.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25797000%3A_____%2F14%3A%230000478" target="_blank" >RIV/25797000:_____/14:#0000478 - isvavai.cz</a>

Result on the web

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

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.606.31" target="_blank" >10.4028/www.scientific.net/KEM.606.31</a>

Result language

angličtina

Original language name

Evaluation of fatigue strength of heat treated and laser hardened 42CrMo4 steel considering localized initiation mechanisms.

Original language description

The paper contains results of a partial study of effect of laser hardening of relatively small specimens on fatigue resistance of 42CrMo4 steel. 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 had a surprisingly high, atypical scatter, particularly in the region near fatigue limit. Fractographical analyses indicated that this scatter was connected with presence of single inclusions, even quite large, which in some cases caused fatigue crack initiation. Compressive residual stresses after the laser treatment improved fatigue strength and reduced the scatter, likely due to short crack retardation in the compressive residuals stress field. Further analyses and discussion are provided using Murakami method of fatigue life evaluation of materials containing defects.

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

<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

Name of the periodical

Key Engineering Materials

ISSN

1013-9826

e-ISSN

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Volume of the periodical

606

Issue of the periodical within the volume

2014

Country of publishing house

CH - SWITZERLAND

Number of pages

4

Pages from-to

31-34

UT code for WoS article

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EID of the result in the Scopus database

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