RT info:eu-repo/semantics/article
T1 Notch fracture predictions using the Phase Field method for Ti-6Al-4V produced by Selective Laser Melting after different post-processing conditions
A1 Díaz Portugal, Andrés
A1 Alegre Calderón, Jesús Manuel
A1 Cuesta Segura, Isidoro Iván
A1 Martínez Pañeda, Emilio
A1 Zhang, Zhiliang
K1 Notch fracture
K1 Finite element modelling
K1 Phase Field
K1 Additive manufacturing
K1 Ti-6Al-4V
K1 Resistencia de materiales
K1 Strength of materials
K1 Ingeniería mecánica
K1 Mechanical engineering
AB Ti-6Al-4V is a titanium alloy with excellent properties for lightweight applications and its production through Additive Manufacturing processes is attractive for different industrial sectors. In this work, the influence of mechanical properties on the notch fracture resistance of Ti-6Al-4V produced by Selective Laser Melting is numerically investigated. Literature data is used to inform material behaviour. The as-built brittle behaviour is compared to the enhanced ductile response after heat treatment (HT) and hot isostatic pressing (HIP) post-processes. A Phase Field framework is adopted to capture damage nucleation and propagation from two different notch geometries and a discussion on the influence of fracture energy and the characteristic length is carried out. In addition, the influence of oxygen uptake is analysed by reproducing non-inert atmospheres during HT and HIP, showing that oxygen shifts fracture to brittle failures due to the formation of an alpha case layer, especially for the V-notch geometry. Results show that a pure elastic behaviour can be assumed for the as-built SLM condition, whereas elastic-plastic phenomena must be modelled for specimens subjected to heat treatment or hot isostatic pressing. The present brittle Phase Field framework coupled with an elastic-plastic constitutive analysis is demonstrated to be a robust prediction tool for notch fracture after different post-processing routes.
PB Elsevier
SN 0167-8442
YR 2022
FD 2022-10
LK http://hdl.handle.net/10259/7511
UL http://hdl.handle.net/10259/7511
LA eng
NO Financial support from the Junta of Castile and Leon through grant BU-002-P20, co-financed by FEDER funds. E. Martínez-Pañeda was supported by an UKRI Future Leaders Fellowship (grant MR/V024124/1). A. Díaz wishes to thank the Nanomechanical Lab of NTNU for providing hospitality during his research stay.
DS Repositorio Institucional de la Universidad de Burgos
RD 03-may-2024