Akademik Veri Yönetim Sistemi
International Journal of Fatigue, cilt.210, 2026 (SCI-Expanded, Scopus)
Additive manufacturing (AM) titanium alloys offer excellent static mechanical properties, yet their inadequate fatigue performance limits their use in critical aerospace load-bearing components. To address the prevalent issue of fatigue cracking at surface or subsurface in AM Ti6Al4V alloy, this study innovatively introduces and systematically evaluates a novel surface following integral shocking (SFIS) technique in comparison with the conventional shot peening (SP) and laser shock peening (LSP). Results demonstrate that SFIS effectively enhances surface hardness and introduces compressive residual stress, while maintaining relatively low surface roughness. This combined effect mitigates stress concentrations and shifts fatigue crack initiation from the surface to the interior. As a result, SFIS-treated specimens achieve a nearly 10% improvement in the bending fatigue strength relative to the traditional SP and LSP ones. A fatigue strength prediction model based on some key surface parameters is further established, showing high accuracy with errors within 2%. This work confirms SFIS as a highly effective surface treatment for enhancing the fatigue resistance of AM titanium alloys, providing a viable route toward improved service reliability.