RT info:eu-repo/semantics/article
T1 Modelling hydrogenation during cold dwell fatigue of additively manufactured titanium alloys
A1 Díaz Portugal, Andrés
A1 Cuesta Segura, Isidoro Iván
A1 Alegre Calderón, Jesús Manuel
K1 Finite Element modelling
K1 Hydrogen embrittlement
K1 Hydride formation
K1 Ti-6Al-4V
K1 Selective Laser Melting
K1 Ingeniería mecánica
K1 Mechanical engineering
K1 Materiales
K1 Materials
AB Titanium alloys are widely employed in aerospace and automotive industries where lightweight applications are required. Additive Manufacturing (AM) processes have been proposed in order to reduce material waste and optimise mechanical properties. In addition, throughout these manufacturing processes and during service life, hydrogen uptake is expected, and the corresponding modification of mechanical properties needs to be modelled. Hydrogenation process including diffusion, trapping and hydride formation in a Ti-6Al-4V alloy during cold dwell fatigue loading, a common failure mode of titanium alloys, is simulated here. All governing equations are implemented in ABAQUS user subroutines. A boundary layer approach is used to simulate how hydrogen redistribution affects hydride kinetics near a blunting crack tip, in which cyclic loading is implemented considering different dwell times. The influence of AM techniques, especially Selective Laser Melting, is expected to promote the increase in martensite phase and microstructure defects due to rapid cooling; thus, the influence of martensite volume fraction and of trapping density on hydrogen redistribution near the crack tip is analysed. The possibility to implement hydrogen and hydride-induced dilatation is also presented, as well as a hydrogen-dependent localised plasticity model. This framework facilitates the prediction of how additive manufacturing processes affect susceptibility to hydrogen embrittlement in Ti-6Al-4V components subjected to dwell fatigue.
PB Elsevier
SN 2452-3216
YR 2021
FD 2021-10
LK http://hdl.handle.net/10259/7311
UL http://hdl.handle.net/10259/7311
LA eng
NO Artículo publicado en el V. 34 dedicado a: The second European Conference on the Structural Integrity of Additively Manufactured Materials
NO The authors gratefully acknowledge financial support from the Junta of Castile and Leon through grant BU-002- P20, co-financed by FEDER funds.
DS Repositorio Institucional de la Universidad de Burgos
RD 23-nov-2024