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On the fatigue behaviour and modelling of fatigue life for laser-welded Ti-6Al-4V
Citation Link: https://doi.org/10.15480/882.2529
Publikationstyp
Doctoral Thesis
Date Issued
2019
Sprache
English
Author(s)
Advisor
Referee
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2019-11-11
TORE-DOI
TORE-URI
Citation
Technische Universität Hamburg (2019)
This aim of this work is to investigate the fatigue behaviour of laser-welded Ti-6Al-4V titanium alloy in the region of high cycle fatigue. The crack initiation mechanism and the influence of weld defects on fatigue performance were comprehensively studied. A set of post-weld treatments that can mitigate the effect of inherent weld imperfections and thereby extend the fatigue life were analysed. A robust and efficient analytical assessment model for internally-flawed materials has been developed based on a fracture mechanics approach. The developed methodology can be used for the reliability assessment of components with various types of defects, thus enabling a defect-tolerant design of welded structures.
Subjects
Fatigue
Titanium
Laser beam welding
Short cracks
Fracture mechanics
DDC Class
600: Technik
620: Ingenieurwissenschaften
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Fomin_Dissertation_ENDFASSUNG.pdf
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27.56 MB
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