%0 doctoral thesis
%@ 
%A Fomin, F.

%D 2019
%J 
%N 
%P  
%R doi:10.15480%2F882.2529
%T On the fatigue behaviour and modelling of fatigue life for laser-welded Ti-6Al-4V
%U https://doi.org/10.15480%2F882.2529
 
%X 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.