Surface modification methods for fatigue properties improvement of laser-beam-welded Ti-6Al-4V butt joints

Fedor Fomin; Benjamin Klusemann; Nikolai Kashaev

doi:10.1016/j.prostr.2018.12.046

Surface modification methods for fatigue properties improvement of laser-beam-welded Ti-6Al-4V butt joints

Fedor Fomin
, Benjamin Klusemann
, Nikolai Kashaev

Helmholtz Centre Hereon

Research output: Journal contributions › Conference article in journal › Research › peer-review

22 Citations (Scopus)

Abstract

Surface and internal defects formed upon laser beam welding (LBW) have been recognized as a serious problem because they cause stress concentration leading to premature failure of a welded component. This paper seeks to remedy these weld imperfections by applying various post-weld treatments and analyzing their effect on the high cycle fatigue (HCF) performance of welded joints. High efficiency of laser-based post-processing techniques after welding such as laser surface remelting (LSR) and laser shock peening (LSP) was demonstrated and compared with conventional approaches. The study reveals that welding porosity determines the internal crack initiation of the surface-treated weldments. Influence of process parameters on porosity level and the HCF properties is presented in detail. Based on an extensive experimental study, practical guidelines needed to mitigate the notch effect from defects and to maximize the fatigue performance of the laser-welded Ti-6Al-4V butt joints are given.

Original language	English
Journal	Procedia Structural Integrity
Volume	13
Pages (from-to)	273-278
Number of pages	6
ISSN	2452-3216
DOIs	https://doi.org/10.1016/j.prostr.2018.12.046
Publication status	Published - 31.12.2018
Event	22nd European Conference on Fracture - ECF22: Loading and Environmental effects on Structural Integrity - Belgrade, Serbia Duration: 26.08.2018 → 31.08.2018 Conference number: 22 http://www.ecf22.rs/

Bibliographical note

Publisher Copyright:
© 2018 The Authors.

Research areas and keywords

Engineering
Defects
High cycle fatigue
Laser beam welding
Laser shock peening
Porosity

ASJC Scopus Subject Areas

Mechanical Engineering
Materials Science(all)
Civil and Structural Engineering
Mechanics of Materials

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title = "Surface modification methods for fatigue properties improvement of laser-beam-welded Ti-6Al-4V butt joints",

abstract = "Surface and internal defects formed upon laser beam welding (LBW) have been recognized as a serious problem because they cause stress concentration leading to premature failure of a welded component. This paper seeks to remedy these weld imperfections by applying various post-weld treatments and analyzing their effect on the high cycle fatigue (HCF) performance of welded joints. High efficiency of laser-based post-processing techniques after welding such as laser surface remelting (LSR) and laser shock peening (LSP) was demonstrated and compared with conventional approaches. The study reveals that welding porosity determines the internal crack initiation of the surface-treated weldments. Influence of process parameters on porosity level and the HCF properties is presented in detail. Based on an extensive experimental study, practical guidelines needed to mitigate the notch effect from defects and to maximize the fatigue performance of the laser-welded Ti-6Al-4V butt joints are given.",

keywords = "Engineering, laser shock peening, Defects, High cycle fatigue, Laser beam welding, Laser shock peening, Porosity",

author = "Fedor Fomin and Benjamin Klusemann and Nikolai Kashaev",

note = "Publisher Copyright: {\textcopyright} 2018 The Authors.; 22nd European Conference on Fracture - ECF22 : Loading and Environmental effects on Structural Integrity, ECF22 ; Conference date: 26-08-2018 Through 31-08-2018",

year = "2018",

month = dec,

day = "31",

doi = "10.1016/j.prostr.2018.12.046",

language = "English",

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journal = "Procedia Structural Integrity",

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TY - JOUR

T1 - Surface modification methods for fatigue properties improvement of laser-beam-welded Ti-6Al-4V butt joints

AU - Fomin, Fedor

AU - Klusemann, Benjamin

AU - Kashaev, Nikolai

N1 - Conference code: 22

PY - 2018/12/31

Y1 - 2018/12/31

N2 - Surface and internal defects formed upon laser beam welding (LBW) have been recognized as a serious problem because they cause stress concentration leading to premature failure of a welded component. This paper seeks to remedy these weld imperfections by applying various post-weld treatments and analyzing their effect on the high cycle fatigue (HCF) performance of welded joints. High efficiency of laser-based post-processing techniques after welding such as laser surface remelting (LSR) and laser shock peening (LSP) was demonstrated and compared with conventional approaches. The study reveals that welding porosity determines the internal crack initiation of the surface-treated weldments. Influence of process parameters on porosity level and the HCF properties is presented in detail. Based on an extensive experimental study, practical guidelines needed to mitigate the notch effect from defects and to maximize the fatigue performance of the laser-welded Ti-6Al-4V butt joints are given.

AB - Surface and internal defects formed upon laser beam welding (LBW) have been recognized as a serious problem because they cause stress concentration leading to premature failure of a welded component. This paper seeks to remedy these weld imperfections by applying various post-weld treatments and analyzing their effect on the high cycle fatigue (HCF) performance of welded joints. High efficiency of laser-based post-processing techniques after welding such as laser surface remelting (LSR) and laser shock peening (LSP) was demonstrated and compared with conventional approaches. The study reveals that welding porosity determines the internal crack initiation of the surface-treated weldments. Influence of process parameters on porosity level and the HCF properties is presented in detail. Based on an extensive experimental study, practical guidelines needed to mitigate the notch effect from defects and to maximize the fatigue performance of the laser-welded Ti-6Al-4V butt joints are given.

KW - Engineering

KW - laser shock peening

KW - Defects

KW - High cycle fatigue

KW - Laser beam welding

KW - Laser shock peening

KW - Porosity

UR - https://www.scopus.com/pages/publications/85064714814

U2 - 10.1016/j.prostr.2018.12.046

DO - 10.1016/j.prostr.2018.12.046

M3 - Conference article in journal

SN - 2452-3216

VL - 13

SP - 273

EP - 278

JO - Procedia Structural Integrity

JF - Procedia Structural Integrity

T2 - 22nd European Conference on Fracture - ECF22

Y2 - 26 August 2018 through 31 August 2018

ER -

Surface modification methods for fatigue properties improvement of laser-beam-welded Ti-6Al-4V butt joints

Abstract

Bibliographical note

Research areas and keywords

ASJC Scopus Subject Areas

Access to Document

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