loading page

On the relative significance of roughness, printing defects and microstructure on the fatigue behaviour of electron beam melted Ti-6Al-4V
  • +2
  • Marcos Bergant,
  • Sergio Soria,
  • Ignacio Bustos,
  • Hugo Soul,
  • Alejandro Yawny
Marcos Bergant
Centro Atomico Bariloche

Corresponding Author:[email protected]

Author Profile
Sergio Soria
Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET
Author Profile
Ignacio Bustos
Centro Atomico Bariloche
Author Profile
Hugo Soul
Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET
Author Profile
Alejandro Yawny
Centro Atomico Bariloche
Author Profile

Abstract

In contrast, but complementary to previous studies, this study examines the fatigue behaviour in Ti-6Al-4V obtained by electron beam powder bed fusion, focusing on damage initiation sites, fatigue damage progression, and correlating these with fatigue life curves. Three material conditions were considered: as-built specimens with original surfaces after printing (AB), as-built specimens with a machined and polished surface (MP), and hot isostatic pressed specimens with a machined and polished surface (H). Fatigue fracture surface topography was analysed using scanning electron microscopy and surface metrology microscopy. Different fatigue responses were observed, with crack initiation at surface roughness in AB, lack of fusion defects in MP, and phase facet formation in H specimens. Interaction between cracks and manufacturing defects was investigated. Kitagawa-Takahashi diagrams were applied successfully to AB and MP specimens. This study aims to enhance understanding of crack initiation and interaction mechanisms, improving life prediction capabilities through microstructure and defect-sensitive modelling.
16 Sep 2024Submitted to Fatigue & Fracture of Engineering Materials & Structures
18 Sep 2024Submission Checks Completed
18 Sep 2024Assigned to Editor
20 Sep 2024Reviewer(s) Assigned
12 Oct 2024Review(s) Completed, Editorial Evaluation Pending
14 Oct 2024Editorial Decision: Revise Major