Time-resolved temperature measurement during laser marking of stainless steel

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F18%3A43952395" target="_blank" >RIV/49777513:23640/18:43952395 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.04.137" target="_blank" >http://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.04.137</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.04.137" target="_blank" >10.1016/j.ijheatmasstransfer.2018.04.137</a>

Result language

angličtina

Original language name

Time-resolved temperature measurement during laser marking of stainless steel

Original language description

A new measurement system was developed for time-resolved surface temperature measurement in nanosecond time scale. A study of surface temperatures reached by different parameters of laser marking and their correlation with resulting microstructure, phase composition and corrosion tests performed on marked samples is presented. The marking was done using a nanosecond pulsed fibre laser with variable pulse duration (from 9 to 200 ns), repetition frequency and pulse energy. Different phase composition and corrosion resistance were observed for visually similar marking results obtained by different laser parameters. This correlates well with maximum temperatures reached in the laser spot, which varied from less than 1100 °C for longer pulses to more than 1800 °C for shorter pulses. Melting of the surface with up to 4 µm thickness was observed for marking processes inducing high temperatures. The maximum temperatures in the pulse depend not only on pulse duration but also on previous pulses due to the heat accumulation effect. A temperature difference of up to 500 K was observed due to heat accumulation. From the results it can be concluded that combinations of longer pulse duration and higher repetition rate are the most suitable parameters for preserving corrosion resistance of stainless steel after laser marking.

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

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER

ISSN

0017-9310

e-ISSN

—

Volume of the periodical

125

Issue of the periodical within the volume

OCT 2018

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

1061-1068

UT code for WoS article

000440118600091

EID of the result in the Scopus database

2-s2.0-85046820370