Abstract
Fatigue testing was conducted to investigate the potential of applying Laser Metal Deposition(LMD) as a repair method for Ti-6Al-4V aerospace components. Ti-6Al-4V powder was laser deposited on Ti-6Al-4V specimens with two different deposition strategies: a raster pattern with a continuous deposit (LMD-1) and a raster pattern deposit with an inter-track pause (LMD-2). The results showed fatigue lives of LMD-1 were higher when compared to LMD-2. This was mainly due to the high number of defects in LMD-2, mostly lack of fusion (LOF) defects. Despite the high number of defects, fracture surfaces for both LMD-1 and LMD-2 showed initiation to be from oxygen enriched inclusions, which could be related to contamination. This study shows the deposition strategy influences fatigue lives when laser depositing Ti-6Al-4V powder on Ti-6Al-4V substrate and there are possibilities of oxygen and nitrogen related inclusions that introduce brittle regions that are more detrimental to the fatigue performance than LOF defects or gas pores.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
