Local weld geometry-based characterization of fatigue strength in laser-MAG hybrid welded joints

Abinab Niraula; Heikki Remes; Pauli Lehto

doi:10.1007/s40194-023-01488-5

Local weld geometry-based characterization of fatigue strength in laser-MAG hybrid welded joints

Abinab Niraula^*, Heikki Remes, Pauli Lehto

^*Corresponding author for this work

Meyer Turku Oy

Research output: Contribution to journal › Article › Scientific › peer-review

7 Citations (Scopus)

59 Downloads (Pure)

Abstract

Thisresearch studies the influence of local weld notch parameters on fatigue crack initiation sites in laser-hybrid butt welds, utilizing high-resolution 3D scans and fatigue tests to failure. The suitability of different local geometric weld notch parameters for fatigue strength characterization is investigated, and the current challenges associated with their measurements are highlighted. The weld notch shapes were found to fluctuate significantly, resulting in considerable variation in notch parameters over short intervals. Undercut depth was found to determine the critical location for crack initiation. There were several instances where the fatigue crack initiated from notches with large radii despite the presence of sharper notches, contrary to what is expected on the basis of previous investigations. The results of the present study indicate that the undercut depth is a suitable fatigue strength indicator for high-quality laser-MAG hybrid welds, overcoming the practical limitations of notch radius measurement.

Original language	English
Pages (from-to)	1527-1544
Number of pages	18
Journal	Welding in the World
Volume	67
Issue number	6
Early online date	2 Feb 2023
DOIs	https://doi.org/10.1007/s40194-023-01488-5
Publication status	Published - Jun 2023
MoE publication type	A1 Journal article-refereed

Keywords

Butt weld
Fatigue
Laser-hybrid
Local weld notch
Notch geometry
Undercut

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10.1007/s40194-023-01488-5Licence: CC BY

s40194-023-01488-5-1Final published version, 2.48 MBLicence: CC BY

Cite this

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title = "Local weld geometry-based characterization of fatigue strength in laser-MAG hybrid welded joints",

abstract = "Thisresearch studies the influence of local weld notch parameters on fatigue crack initiation sites in laser-hybrid butt welds, utilizing high-resolution 3D scans and fatigue tests to failure. The suitability of different local geometric weld notch parameters for fatigue strength characterization is investigated, and the current challenges associated with their measurements are highlighted. The weld notch shapes were found to fluctuate significantly, resulting in considerable variation in notch parameters over short intervals. Undercut depth was found to determine the critical location for crack initiation. There were several instances where the fatigue crack initiated from notches with large radii despite the presence of sharper notches, contrary to what is expected on the basis of previous investigations. The results of the present study indicate that the undercut depth is a suitable fatigue strength indicator for high-quality laser-MAG hybrid welds, overcoming the practical limitations of notch radius measurement.",

keywords = "Butt weld, Fatigue, Laser-hybrid, Local weld notch, Notch geometry, Undercut",

author = "Abinab Niraula and Heikki Remes and Pauli Lehto",

note = "| openaire: EC/H2020/723246/EU//RAMSSES Funding Information: Open Access funding provided by Aalto University. This research was funded by Aalto University, Meyer Turku Oy, and the RAMSSES project (funded by the European Union{\textquoteright}s Horizon 2020, grant agreement No. 723246), and the CaNeLis project (funded by the Business Finland, grant No. 3409/31/2022). The financial support is gratefully acknowledged. Publisher Copyright: {\textcopyright} 2023, The Author(s).",

year = "2023",

month = jun,

doi = "10.1007/s40194-023-01488-5",

language = "English",

volume = "67",

pages = "1527--1544",

journal = "Welding in the World",

issn = "0043-2288",

publisher = "Springer",

number = "6",

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TY - JOUR

T1 - Local weld geometry-based characterization of fatigue strength in laser-MAG hybrid welded joints

AU - Niraula, Abinab

AU - Remes, Heikki

AU - Lehto, Pauli

N1 - | openaire: EC/H2020/723246/EU//RAMSSES Funding Information: Open Access funding provided by Aalto University. This research was funded by Aalto University, Meyer Turku Oy, and the RAMSSES project (funded by the European Union’s Horizon 2020, grant agreement No. 723246), and the CaNeLis project (funded by the Business Finland, grant No. 3409/31/2022). The financial support is gratefully acknowledged. Publisher Copyright: © 2023, The Author(s).

PY - 2023/6

Y1 - 2023/6

N2 - Thisresearch studies the influence of local weld notch parameters on fatigue crack initiation sites in laser-hybrid butt welds, utilizing high-resolution 3D scans and fatigue tests to failure. The suitability of different local geometric weld notch parameters for fatigue strength characterization is investigated, and the current challenges associated with their measurements are highlighted. The weld notch shapes were found to fluctuate significantly, resulting in considerable variation in notch parameters over short intervals. Undercut depth was found to determine the critical location for crack initiation. There were several instances where the fatigue crack initiated from notches with large radii despite the presence of sharper notches, contrary to what is expected on the basis of previous investigations. The results of the present study indicate that the undercut depth is a suitable fatigue strength indicator for high-quality laser-MAG hybrid welds, overcoming the practical limitations of notch radius measurement.

AB - Thisresearch studies the influence of local weld notch parameters on fatigue crack initiation sites in laser-hybrid butt welds, utilizing high-resolution 3D scans and fatigue tests to failure. The suitability of different local geometric weld notch parameters for fatigue strength characterization is investigated, and the current challenges associated with their measurements are highlighted. The weld notch shapes were found to fluctuate significantly, resulting in considerable variation in notch parameters over short intervals. Undercut depth was found to determine the critical location for crack initiation. There were several instances where the fatigue crack initiated from notches with large radii despite the presence of sharper notches, contrary to what is expected on the basis of previous investigations. The results of the present study indicate that the undercut depth is a suitable fatigue strength indicator for high-quality laser-MAG hybrid welds, overcoming the practical limitations of notch radius measurement.

KW - Butt weld

KW - Fatigue

KW - Laser-hybrid

KW - Local weld notch

KW - Notch geometry

KW - Undercut

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U2 - 10.1007/s40194-023-01488-5

DO - 10.1007/s40194-023-01488-5

M3 - Article

AN - SCOPUS:85147286174

SN - 0043-2288

VL - 67

SP - 1527

EP - 1544

JO - Welding in the World

JF - Welding in the World

IS - 6

ER -

Local weld geometry-based characterization of fatigue strength in laser-MAG hybrid welded joints

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CaNeLis: Carbon-neutral lightweight ship structures using advanced design, production, and life-cycle services

RAMSSES: Realisation and Demonstration of Advanced Material Solutions for Sustainable and Efficient Ships

Solid Mechanics Laboratory (i3)

Study Findings on Welding Research Are Outlined in Reports from Aalto University (Local Weld Geometry-based Characterization of Fatigue Strength In Laser-mag Hybrid Welded Joints)

IIW Annual Assembly and International Conference - Tokyo

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Local weld geometry-based characterization of fatigue strength in laser-MAG hybrid welded joints

Abstract

Keywords

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Projects

CaNeLis: Carbon-neutral lightweight ship structures using advanced design, production, and life-cycle services

RAMSSES: Realisation and Demonstration of Advanced Material Solutions for Sustainable and Efficient Ships

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Solid Mechanics Laboratory (i3)

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Study Findings on Welding Research Are Outlined in Reports from Aalto University (Local Weld Geometry-based Characterization of Fatigue Strength In Laser-mag Hybrid Welded Joints)

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IIW Annual Assembly and International Conference - Tokyo

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