Numerical modeling of hybrid laser welding taking into account phase change of material

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F17%3A43930993" target="_blank" >RIV/49777513:23220/17:43930993 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21230/17:00315635

Výsledek na webu

<a href="http://www.emeraldinsight.com/doi/pdfplus/10.1108/COMPEL-05-2016-0225" target="_blank" >http://www.emeraldinsight.com/doi/pdfplus/10.1108/COMPEL-05-2016-0225</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1108/COMPEL-05-2016-0225" target="_blank" >10.1108/COMPEL-05-2016-0225</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical modeling of hybrid laser welding taking into account phase change of material

Popis výsledku v původním jazyce

Purpose -This paper aims to present a three-dimensional (3D) model of hybrid laser welding of a steel plate. Before welding, the plate is pre-And/or post-heated by induction to avoid mechanical stresses in material due to high gradients of temperature. Welding itself is realized by laser beam without welding rod. The model takes into account existence of both solid and liquid phases in the weld. Design/methodology/approach - Presented is the complete mathematical model of the above heat treatment process, taking into account all relevant nonlinearities (saturation curve of the processed steel material and temperature dependences of its physical parameters). Its numerical solution is realized by the finite element method. Some important results are compared with experimental data. Findings - In comparison with the former model developed by the authors that did not take into account the phase change, the results are more realistic and exhibit a better accordance with measurements. On the other hand, they strongly depend on sufficiently accurate knowledge of material parameters in both solid and liquid levels (that represent the input data). Research limitations/implications -The quality of calculated results strongly depends on the material properties and their temperature dependencies. In case of alloys (whose chemical composition may vary in some range), such data are often unavailable and must be estimated on the basis of experiments. Another quantity that has to be calibrated is the time dependence of power delivered by the laser beam, which is due to the production of a plasma cloud above the exposed spot. Practical implications -The presented model and methodology of its solution may represent a basis for design of the complete technology of laser welding with induction pre-heating and/or post-heating. Originality/value - Fully 3D model of hybrid laser welding (supplemented with pre-And/or post-heating by magnetic induction) taking into account both solid and...

Název v anglickém jazyce

Numerical modeling of hybrid laser welding taking into account phase change of material

Popis výsledku anglicky

Purpose -This paper aims to present a three-dimensional (3D) model of hybrid laser welding of a steel plate. Before welding, the plate is pre-And/or post-heated by induction to avoid mechanical stresses in material due to high gradients of temperature. Welding itself is realized by laser beam without welding rod. The model takes into account existence of both solid and liquid phases in the weld. Design/methodology/approach - Presented is the complete mathematical model of the above heat treatment process, taking into account all relevant nonlinearities (saturation curve of the processed steel material and temperature dependences of its physical parameters). Its numerical solution is realized by the finite element method. Some important results are compared with experimental data. Findings - In comparison with the former model developed by the authors that did not take into account the phase change, the results are more realistic and exhibit a better accordance with measurements. On the other hand, they strongly depend on sufficiently accurate knowledge of material parameters in both solid and liquid levels (that represent the input data). Research limitations/implications -The quality of calculated results strongly depends on the material properties and their temperature dependencies. In case of alloys (whose chemical composition may vary in some range), such data are often unavailable and must be estimated on the basis of experiments. Another quantity that has to be calibrated is the time dependence of power delivered by the laser beam, which is due to the production of a plasma cloud above the exposed spot. Practical implications -The presented model and methodology of its solution may represent a basis for design of the complete technology of laser welding with induction pre-heating and/or post-heating. Originality/value - Fully 3D model of hybrid laser welding (supplemented with pre-And/or post-heating by magnetic induction) taking into account both solid and...

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

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)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

COMPEL : the International Journal for Computation and Mathematics in Electrical and Electronic Engineering

ISSN

0332-1649

e-ISSN

—

Svazek periodika

36

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

417-426

Kód UT WoS článku

000399047400004

EID výsledku v databázi Scopus

2-s2.0-85015907897