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Agirre, Julen; Otegi, Nagore; GALDOS, Lander; Arrese Irazabal, Peio (UEU, 2021)Hammer forging is a widely employed manufacturing process to produce parts with excellent mechanical properties. In order to achieve an optimal process design, finite element modelling is broadly utilized in industry and ... -
An automatic thermo-mechanical testing apparatus for metal forming applications
Agirre, Julen; Abedul Moreno, David; Sáenz de Argandoña, Eneko; Otegi, Nagore; GALDOS, Lander; Erice, Borja (Elsevier, 2023)Dynamic testing of materials is necessary to model high-speed forming processes (e.g. hammer forging, blanking, forming, etc.) and crash/impact behaviour of structures, amongst others. The most common machines to perform ... -
Characterization of friction coefficient at near solidus forming (NSF) conditions using T-shape compression test
Sajjad, Muhammad; Agirre, Julen; Plata, Gorka; Mendiguren, Joseba (Elsevier, 2024)Amidst the escalating demand for sustainable manufacturing practices aimed at mitigating global emissions and waste, industries are actively seeking novel forming solutions to address these pressing global challenges. Near ... -
Characterization of the heat transfer coefficient at near solidus forming condition using columnar pressing test
Sajjad, Muhammad; Agirre, Julen; Plata, Gorka; Mendiguren, Joseba (Springer Nature, 2024)This study addresses the significant gap in the literature regarding the heat transfer coefficient (HTC) under near-solidus forming (NSF) conditions, where materials are shaped close to their solidus state, presenting ... -
Characterization of Ti64 forging friction factor using ceramic coatings and different contact conditions
GALDOS, Lander; Mendiguren, Joseba; Sáenz de Argandoña, Eneko; Agirre, Julen (Elsevier, 2017)Hot forging processes are highly influenced by the contact conditions between the billet and the dies. A wrong definition of the contact conditions may lead to wrong predictions of the final component geometry, the quantity ... -
Design of a new simulative tribotest for warm forming applications having high contact pressure and surface enlargement
GALDOS, Lander; Agirre, Julen; Aranburu Eziolaza, Elixabet (Materials Research Forum LLC., 2023)Many tribological tests have been developed in the last decades to emulate real cold forging processes at laboratory conditions and to obtain friction coefficients at different process conditions. In this paper a new ... -
Dynamic fracture initiation of high-strength metals
Perez Martin, M.J.; Agirre, Julen; Gálvez, F.; Erice, Borja (Sociedad Española de Integridad Estructural - Grupo Español de Fractura SEIE-GEF, 2023)Different modelling approaches have been analysed to investigate the dynamic fracture initiation toughness of two metallic alloys typically employed as plate armour in defence applications. These have been mechanically ... -
Effect of near beta-transus forging parameters on the mechanical and microstructural properties of Ti-6Al-4V: Application to hammer forging
Agirre, Julen; Erice, Borja; Arrese Irazabal, Peio; GALDOS, Lander (Materials Research Forum LLC., 2023)Ti-6Al-4V is a widely employed material in the aerospace, power generation and bioengineering industries due to its low density, excellent corrosion resistance and outstanding mechanical properties. Hammer forging is one ... -
Hardening prediction of diverse materials using the Digital Image Correlation technique
Agirre, Julen; Mendiguren, Joseba; GALDOS, Lander; Sáenz de Argandoña, Eneko (Elsevier, 2018)In recent years, due to the introduction of higher resistance materials in the automotive sector, sheet metal-forming tool-makers have been forced to deal with more challenging process designs. Therefore, the optimisation ... -
High-Speed Material Characterization Using an Instrumented Forging Hammer
Agirre, Julen; Abedul Moreno, David; Oruna Otalora, Angel; GALDOS, Lander (Springer, 2021)Hammer forging is a widely employed manufacturing process to produce parts with excellent mechanical properties. Although the rheological behavior and the microstructural transformation phenomena of metals under hammer ... -
Hole expansion test of third generation steels
Agirre, Julen; Mendiguren, Joseba; GALDOS, Lander; Sáenz de Argandoña, Eneko (AIP Publishing, 2017)The trend towards the implementation of new materials in the chassis of the automobiles is considerably making more complex the manufacturing of the components that built it up. In this scenario materials with higher ... -
The influence of the adiabatic heating coefficient on the near solidus forming process
Sajjad, Muhammad; Agirre, Julen; Plata, Gorka; Lozares Abasolo, Jokin; Mendiguren, Joseba (Springer Nature, 2025)The Near Solidus Forming (NSF) process represents a critical method for shaping metallic components under extreme temperature conditions. When metals deform plastically, significant amounts of heat can be generated, which ... -
Monitoring of a Hammer Forging Testing Machine for High-Speed Material Characterization
Agirre, Julen; Otegi, Nagore; Abedul Moreno, David; Oruna Otalora, Angel; GALDOS, Lander (Elsevier Ltd., 2020)Dynamic testing of materials is necessary to model high-speed forming processes (i.e. hammer forging, blanking) and crash/impact behavior of structures, among others. The most common machines to perform medium to high-speed ... -
Simulation of Cold Forging Processes Using a Mixed Isotropic-Kinematik Hardening Model
GALDOS, Lander; Agirre, Julen; Otegi, Nagore; Mendiguren, Joseba; Sáenz de Argandoña, Eneko (Springer, 2021)Cold forging is a manufacturing process where a bar stock is inserted into a die and squeezed with a second closed die. It is one of the most widely used chipless forming processes, often requiring no machining or additional ... -
Study on the influence of the springback on the hole expansion ratio characterization
Zubia, Biotza; Mendiguren, Joseba; GALDOS, Lander; Sáenz de Argandoña, Eneko; Agirre, Julen (Whioce Publishing, 2018)Material formability has become one of the main problems, together with the springback, when stamping high added-value components for the automotive industry. The pursuit of weight reduction has led to higher strength ...
