RT info:eu-repo/semantics/article
T1 Effect of HIP post-processing at 850 °C/200 MPa in the fatigue behavior of Ti-6Al-4V alloy fabricated by Selective Laser Melting
A1 Alegre Calderón, Jesús Manuel
A1 Díaz Portugal, Andrés
A1 García, Ricardo
A1 Peral, Luis Borja
A1 Cuesta Segura, Isidoro Iván
K1 Ti-6A1-4V
K1 Hot isostatic pressing
K1 Selective Laser Melting
K1 Fatigue behavior
K1 Microstructure
K1 Ingeniería civil
K1 Civil engineering
AB Hot Isostatic Pressing (HIP) is a thermomechanical post-processing technique widely used in AdditiveManufacturing parts to reduce internal defects, such as entrapped-gas-pores or lack-of-fusion, which have a greatinfluence on the mechanical and fatigue properties of the material. In this paper, the effect of a non-conventionalHIP-cycle on the fatigue behavior of a Ti-6Al-4V alloy manufactured by Selective Laser melting (SLM) is studied.The HIP-cycle examined in this study is carried out at pressure of 200 MPa and a temperature of 850 ◦C for 2 h.Moreover, the cooling process is faster than that obtained from conventional furnace cooling rates, with the aimto limit the microstructural coarsening effects that affect the fatigue behavior. For the study, an extensiveexperimental fatigue program was carried out which included a first batch of SLM specimens tested under as-builtconditions, a second batch of SLM specimens subjected to the present HIP process, and a third batch of specimensof a reference wrought processed material obtained by rolling and annealing processes. The microstructure of thematerial, before and after HIPping, is analyzed and a fractographic analysis is carried out to study the mechanismof crack initiation and its relation to the fatigue behavior. The results show that the present HIP-process allowsfor very good material densification, a microstructure that shows minimal coarsening effects, and good fatigueproperties comparable to the conventional wrought processed material.
PB Elsevier
SN 0142-1123
YR 2022
FD 2022-10
LK http://hdl.handle.net/10259/7488
UL http://hdl.handle.net/10259/7488
LA eng
NO The authors gratefully acknowledge financial support from the Junta de Castilla y León (Spain) through grant BU-002-P20, co-financed by FEDER funds.
DS Repositorio Institucional de la Universidad de Burgos
RD 03-may-2024