Analysis of laser surface absorptivity modification for selective laser hardening

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F24%3A43972131" target="_blank" >RIV/49777513:23640/24:43972131 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.ijthermalsci.2024.108982" target="_blank" >https://doi.org/10.1016/j.ijthermalsci.2024.108982</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijthermalsci.2024.108982" target="_blank" >10.1016/j.ijthermalsci.2024.108982</a>

Result language

angličtina

Original language name

Analysis of laser surface absorptivity modification for selective laser hardening

Original language description

Laser hardening is a thermal process that improves the surface mechanical properties of metallic materials. Efficiency enhancement of the thermal process of laser hardening is a long-term challenge. The article develops an approach called selective laser hardening that utilizes an absorptivity modification of the surface areas of the part to be processed by laser hardening. Laser surface treatment is used to modify the surface absorptivity. Subsequently, standard laser hardening can be performed on the entire surface. The change of material microstructure occurs only in the areas with increased absorptivity while the areas without surface modification remain structurally unchanged. The methods of laser absorptivity modification including subsequent thermal treatment and analysis of optical properties are described. The results of spectral absorptivity and absorptivity for wavelengths of commonly used hardening lasers (808, 1030 and 1064 nm) are presented for carbon steel EN 10083-2: C45. An important increase in the absorptivity of the laser-modified surface has been found up to 136% of the value of the basic material. This absorptivity difference decreases with increasing temperature of heat treatment, for examples to 7% at 800 ◦C for a laser wavelength of 808 nm. Further, the influence of laser surface modification parameters on the resulting absorptivity and the ability of increased absorptivity to withstand the elevated temperature during laser hardening are also discussed.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

<a href="/en/project/EF18_069%2F0010018" target="_blank" >EF18_069/0010018: LABIR-PAV / Pre-application research of infrared technologies</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

International Journal of Thermal Sciences

ISSN

1290-0729

e-ISSN

1778-4166

Volume of the periodical

200

Issue of the periodical within the volume

JUN 2024

Country of publishing house

FR - FRANCE

Number of pages

12

Pages from-to

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UT code for WoS article

001209841700001

EID of the result in the Scopus database

2-s2.0-85186507820