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| Format: | Artículo Open Access |
| Published: |
Wiley
2025
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| Online Access: | https://onlinelibrary.wiley.com/doi/10.1111/ffe.14607 |
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Table of Contents:
- Fracture Toughness of Ti‐6Al‐4V and Ti‐6Al‐4V ELI Alloys Fabricated by Electron Beam Melting With Different Orientation and Positions Rubén Niñerola Eugenio Giner Fatigue & Fracture of Engineering Materials & Structures ABSTRACTThis paper provides an analysis of the change in fracture toughness of Ti‐6Al‐4V and Ti‐6Al‐4V ELI alloys caused by electron beam melting process. This additive manufacturing technology shows a characteristic metallographic formation: a columnar grain oriented parallel to the building direction that produces an anisotropic mechanical behavior. We present an evaluation of how the microstructural gradient affects mechanical properties, in different orientations and positions in the bottom zone of the manufacturing region. Fracture toughness was analyzed in four orientations, two parallel and two perpendicular to beta columnar grains. Microstructural and mechanical changes are associated with the thermal gradient in the powder bed which produces a cooling rate gradient. Microstructural characteristics vary with respect to vertical position, decreasing hardness and increasing fracture toughness with height. Crack propagation is strongly influenced by the alpha grain boundary. Chemical analyses have been carried out to determine the level of interstitial elements. 10.1111/ffe.14607 http://onlinelibrary.wiley.com/termsAndConditions#vor