Flow and element mixing characteristics in lase-GMA hybrid welding

Suck-Joo Na, Muhammad Sohail, Sang-Eoo Han, Miikka Karhu, Veli Kujanpää

Research output: Contribution to conferenceConference articleScientific

Abstract

Three dimensional numerical simulations are performed to analyze the fluid flow and mixing of alloying element in laser-gas metal arc (GMA) hybrid welding in full penetration welding with GMA leading configuration. Navier stoke's, continuity, energy and volume of fluid (VOF) equations are solved alogwith auxilary models for laser and GMA heat sources. Laser welding is considered using real time multiple reflection models using commerciallly avaialble flow software. The results are compared with experimentally obtained bead shape and the results are found to be in fair agreement. Two distinct flow patterns are found in upper and root surface of workpiece. The incoming metal mostly mixed in molten pool on upper surface therefore higher concentration of Cr is found in upper part of bead. Experimentally obtained EDS scans of Cr shows that mixing is higher in upper part of bead and this fact is also depicted in simulation but the amount of Cr of mixing would vary with location. Higher concentration is expected near the point of laser stoppage.
Original languageEnglish
Number of pages8
Publication statusPublished - 2015
Event14th Nordic Laser Materials Processing Conference, NOLAMP 14 - Gothenburg, Sweden
Duration: 26 Aug 201328 Aug 2013
Conference number: 14

Conference

Conference14th Nordic Laser Materials Processing Conference, NOLAMP 14
Abbreviated titleNOLAMP 14
CountrySweden
CityGothenburg
Period26/08/1328/08/13

Fingerprint

Welding
Gas lasers
Lasers
Laser beam welding
Alloying elements
Flow patterns
Molten materials
Flow of fluids
Energy dispersive spectroscopy
Fluids
Computer simulation
Metals
Metals--Gases
Hot Temperature

Keywords

  • CFD modelling
  • laser welding
  • hybrid laser welding melt flow

Cite this

Na, S-J., Sohail, M., Han, S-E., Karhu, M., & Kujanpää, V. (2015). Flow and element mixing characteristics in lase-GMA hybrid welding. Paper presented at 14th Nordic Laser Materials Processing Conference, NOLAMP 14, Gothenburg, Sweden.
Na, Suck-Joo ; Sohail, Muhammad ; Han, Sang-Eoo ; Karhu, Miikka ; Kujanpää, Veli. / Flow and element mixing characteristics in lase-GMA hybrid welding. Paper presented at 14th Nordic Laser Materials Processing Conference, NOLAMP 14, Gothenburg, Sweden.8 p.
@conference{9612edb65efe4466a38d496780005b9b,
title = "Flow and element mixing characteristics in lase-GMA hybrid welding",
abstract = "Three dimensional numerical simulations are performed to analyze the fluid flow and mixing of alloying element in laser-gas metal arc (GMA) hybrid welding in full penetration welding with GMA leading configuration. Navier stoke's, continuity, energy and volume of fluid (VOF) equations are solved alogwith auxilary models for laser and GMA heat sources. Laser welding is considered using real time multiple reflection models using commerciallly avaialble flow software. The results are compared with experimentally obtained bead shape and the results are found to be in fair agreement. Two distinct flow patterns are found in upper and root surface of workpiece. The incoming metal mostly mixed in molten pool on upper surface therefore higher concentration of Cr is found in upper part of bead. Experimentally obtained EDS scans of Cr shows that mixing is higher in upper part of bead and this fact is also depicted in simulation but the amount of Cr of mixing would vary with location. Higher concentration is expected near the point of laser stoppage.",
keywords = "CFD modelling, laser welding, hybrid laser welding melt flow",
author = "Suck-Joo Na and Muhammad Sohail and Sang-Eoo Han and Miikka Karhu and Veli Kujanp{\"a}{\"a}",
note = "Project : 100976 ; 14th Nordic Laser Materials Processing Conference, NOLAMP 14, NOLAMP 14 ; Conference date: 26-08-2013 Through 28-08-2013",
year = "2015",
language = "English",

}

Na, S-J, Sohail, M, Han, S-E, Karhu, M & Kujanpää, V 2015, 'Flow and element mixing characteristics in lase-GMA hybrid welding' Paper presented at 14th Nordic Laser Materials Processing Conference, NOLAMP 14, Gothenburg, Sweden, 26/08/13 - 28/08/13, .

Flow and element mixing characteristics in lase-GMA hybrid welding. / Na, Suck-Joo; Sohail, Muhammad; Han, Sang-Eoo; Karhu, Miikka; Kujanpää, Veli.

2015. Paper presented at 14th Nordic Laser Materials Processing Conference, NOLAMP 14, Gothenburg, Sweden.

Research output: Contribution to conferenceConference articleScientific

TY - CONF

T1 - Flow and element mixing characteristics in lase-GMA hybrid welding

AU - Na, Suck-Joo

AU - Sohail, Muhammad

AU - Han, Sang-Eoo

AU - Karhu, Miikka

AU - Kujanpää, Veli

N1 - Project : 100976

PY - 2015

Y1 - 2015

N2 - Three dimensional numerical simulations are performed to analyze the fluid flow and mixing of alloying element in laser-gas metal arc (GMA) hybrid welding in full penetration welding with GMA leading configuration. Navier stoke's, continuity, energy and volume of fluid (VOF) equations are solved alogwith auxilary models for laser and GMA heat sources. Laser welding is considered using real time multiple reflection models using commerciallly avaialble flow software. The results are compared with experimentally obtained bead shape and the results are found to be in fair agreement. Two distinct flow patterns are found in upper and root surface of workpiece. The incoming metal mostly mixed in molten pool on upper surface therefore higher concentration of Cr is found in upper part of bead. Experimentally obtained EDS scans of Cr shows that mixing is higher in upper part of bead and this fact is also depicted in simulation but the amount of Cr of mixing would vary with location. Higher concentration is expected near the point of laser stoppage.

AB - Three dimensional numerical simulations are performed to analyze the fluid flow and mixing of alloying element in laser-gas metal arc (GMA) hybrid welding in full penetration welding with GMA leading configuration. Navier stoke's, continuity, energy and volume of fluid (VOF) equations are solved alogwith auxilary models for laser and GMA heat sources. Laser welding is considered using real time multiple reflection models using commerciallly avaialble flow software. The results are compared with experimentally obtained bead shape and the results are found to be in fair agreement. Two distinct flow patterns are found in upper and root surface of workpiece. The incoming metal mostly mixed in molten pool on upper surface therefore higher concentration of Cr is found in upper part of bead. Experimentally obtained EDS scans of Cr shows that mixing is higher in upper part of bead and this fact is also depicted in simulation but the amount of Cr of mixing would vary with location. Higher concentration is expected near the point of laser stoppage.

KW - CFD modelling

KW - laser welding

KW - hybrid laser welding melt flow

M3 - Conference article

ER -

Na S-J, Sohail M, Han S-E, Karhu M, Kujanpää V. Flow and element mixing characteristics in lase-GMA hybrid welding. 2015. Paper presented at 14th Nordic Laser Materials Processing Conference, NOLAMP 14, Gothenburg, Sweden.