INFLUENCE OF INITIAL SURFACE STATE ON LASER SURFACE TEXTURING RESULT

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

INFLUENCE OF INITIAL SURFACE STATE ON LASER SURFACE TEXTURING RESULT

Popis výsledku v původním jazyce

Laser surface texturing (LST) is one of the methods for obtaining surfaces with specific properties. In this paper the influence of initial surface state of sliding bearing steel on laser texturing of this material was studied. Initial surface with roughness R_a = 0.13 ?m was used for providing shifted laser surface texturing (sLST) by ultrashort laser pulses. On initial "rough" surface laser formation of above-surface-growth (ASG) structures was found. Morphology and chemical composition of the ASG structures were analysed by SEM with EDX spectrometer in comparison with initial surface. Two ways of regression of ASG structures were investigated - fine mechanical repolishing of surface for R_a = 0.01 ?m and optimisation of laser processing parameters. It was found that the most suitable method of ASG structures regression is optimisation of laser processing parameters in comparison with mechanical repolishing. Regression of ASG structures formation by optimisation of laser processing parameters was provided by application higher laser fluence. Temperature field distribution for different laser processing parameters is determined from semi-planar thermal model. Heat accumulation effect is evaluated for both - sLST by simple pulses and burst mode. Advantages and disadvantages ofpresented methods for regression of ASG structures formation were discussed with theoretical background. Presentedresults improve understanding of physical principles of ASG structures formation and the ways for their regression.

Název v anglickém jazyce

INFLUENCE OF INITIAL SURFACE STATE ON LASER SURFACE TEXTURING RESULT

Popis výsledku anglicky

Laser surface texturing (LST) is one of the methods for obtaining surfaces with specific properties. In this paper the influence of initial surface state of sliding bearing steel on laser texturing of this material was studied. Initial surface with roughness R_a = 0.13 ?m was used for providing shifted laser surface texturing (sLST) by ultrashort laser pulses. On initial "rough" surface laser formation of above-surface-growth (ASG) structures was found. Morphology and chemical composition of the ASG structures were analysed by SEM with EDX spectrometer in comparison with initial surface. Two ways of regression of ASG structures were investigated - fine mechanical repolishing of surface for R_a = 0.01 ?m and optimisation of laser processing parameters. It was found that the most suitable method of ASG structures regression is optimisation of laser processing parameters in comparison with mechanical repolishing. Regression of ASG structures formation by optimisation of laser processing parameters was provided by application higher laser fluence. Temperature field distribution for different laser processing parameters is determined from semi-planar thermal model. Heat accumulation effect is evaluated for both - sLST by simple pulses and burst mode. Advantages and disadvantages ofpresented methods for regression of ASG structures formation were discussed with theoretical background. Presentedresults improve understanding of physical principles of ASG structures formation and the ways for their regression.

Druh

D - Stať ve sborníku

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

METAL 2016-25th Anniversary International Conference on Metallurgy and Materials

ISBN

978-80-87294-67-3

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

910-915

Název nakladatele

Tanger Ltd.

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

25. 5. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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