Ponencias / Comunicaciones de congresos GIEhttp://hdl.handle.net/10259/42022024-03-29T01:26:59Z2024-03-29T01:26:59ZHydrogen Embrittlement of AISI 316L steel produced by Selective Laser MeltingPeral, L.B.Díaz Portugal, AndrésEbrahimzadeh, P.Fernández-Pariente, I.Alegre Calderón, Jesús ManuelCuesta Segura, Isidoro Ivánhttp://hdl.handle.net/10259/88632024-03-22T01:05:12Z2024-01-01T00:00:00ZHydrogen Embrittlement of AISI 316L steel produced by Selective Laser Melting
Peral, L.B.; Díaz Portugal, Andrés; Ebrahimzadeh, P.; Fernández-Pariente, I.; Alegre Calderón, Jesús Manuel; Cuesta Segura, Isidoro Iván
Selective laser melting (SLM) is one of the common methods of additive manufacturing and it can be employed to customize components with complex geometry expected to work in hydrogen atmospheres. However, more studies are still needed to characterize the behavior of printed mechanical components intended to work in contact with hydrogen. In this study, smooth and notched tensile samples were precharged in an acid solution with 8 mA/cm2 for 24h time. Hydrogen damage was more marked in the notched samples, especially at 0.005 mm/min, where fracture micromechanism changed from ductile in the absence of hydrogen to quasi-brittle in the presence of internal hydrogen. The role of the strain-induced martensite is also highlighted.
Trabajo presentado en: Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23)
2024-01-01T00:00:00ZStudy of crystallization and melting-solidification processes in some fatty acids as phase change materials (PCMs)Peña-Tapia, AlejandroRubio Pérez, GabrielBriones Llorente, RaúlLorenzo Bañuelos, MiriamLifi, MohamedAguilar Romero, FernandoMuñoz Rujas, Nataliahttp://hdl.handle.net/10259/88622024-03-22T01:05:05Z2023-12-01T00:00:00ZStudy of crystallization and melting-solidification processes in some fatty acids as phase change materials (PCMs)
Peña-Tapia, Alejandro; Rubio Pérez, Gabriel; Briones Llorente, Raúl; Lorenzo Bañuelos, Miriam; Lifi, Mohamed; Aguilar Romero, Fernando; Muñoz Rujas, Natalia
Ponencia presentada en: 13th National and 4th International Conference in Engineering Thermodynamics (13CNIT). Universitat Jaume I, Castellón de la Plana (Spain), 29th November to 1st December 2023.
2023-12-01T00:00:00ZEvaluating hydrogen embrittlement susceptibility of a 2205 DSSPeral, L.B.Díaz Portugal, AndrésRodríguez Aparicio, RubénAlegre Calderón, Jesús ManuelCuesta Segura, Isidoro Ivánhttp://hdl.handle.net/10259/78392023-12-05T12:01:28Z2023-01-01T00:00:00ZEvaluating hydrogen embrittlement susceptibility of a 2205 DSS
Peral, L.B.; Díaz Portugal, Andrés; Rodríguez Aparicio, Rubén; Alegre Calderón, Jesús Manuel; Cuesta Segura, Isidoro Iván
Hydrogen embrittlement of a 2205 DSS has been evaluated by in-situ tensile tests at high-pressure hydrogen gas. Mechanical tests
were conducted in smooth and notched samples, following the ASTM G142 standard. Hydrogen embrittlement susceptibility was
studied at 70 and 140 bar. In the smooth samples, the loss of ductility was marked. However, the increase in hydrogen pressure
from 70 to 140 bar seems to be practically negligible. On the other hand, in the notched samples, hydrogen damage was especially
remarkable at 140 bar. Finally, hydrogen embrittlement susceptibility is also discussed based on the fracture micromechanims.
Ponencia presentada en: 5th International Conference on Structural Integrity (ICSI 2023), 28th August - 1st September, 2023. Funchal, Madeira (Portugal)
2023-01-01T00:00:00ZCorrosion of materials from a teaching point of viewPeral, L.B.Díaz Portugal, AndrésAlegre Calderón, Jesús ManuelCuesta Segura, Isidoro Ivánhttp://hdl.handle.net/10259/76882023-05-31T00:05:21Z2023-01-01T00:00:00ZCorrosion of materials from a teaching point of view
Peral, L.B.; Díaz Portugal, Andrés; Alegre Calderón, Jesús Manuel; Cuesta Segura, Isidoro Iván
Corrosion can be defined as the deterioration of metallic components due to electrochemical reactions with the metal and its environment. In the fight against corrosion, research and new technological developments are oriented towards minimizing the effects of this phenomenon in order to delay its 'unavoidable appearance'.
Currently, the most common lines of research in this area focus on the knowledge of corrosion mechanisms and material protection systems. At the teaching level, in the Material Science area, theoretical knowledge about corrosion is well-documented but, is it correctly transmitted to the new generations of students taking into account the important economic losses caused by corrosion in the world of industry?.
There are several Standards that allow to study the behavior in service of certain materials, such as those applied to carry out corrosion studies by testing in salt spray chamber. This type of test allows to know easily, a material’s tendency towards its oxidation state. However, these type of test requires a relatively high exposure time to the aggressive environment; weeks, even months. In this respect, electrochemical techniques could take an important role since in a ‘few minutes’, material behavior could be determined in a corrosive environment. However, electrochemical corrosion tests, which are complementary to more conventional methodologies, require a much more complex analysis methodology.
In this regard, it is important contribute to the training of students, who are interested in the Material Science field, for the right implementation of this type of trials and mainly, for its appropriate analysis and data interpretation. Electrochemistry is an interdisciplinary field in which physical, chemical and mathematical knowledge is essential to accommodate the standardization of certain electrochemical tests that can complement the most conventional corrosion tests.
Definitely, at the teaching level, it is important to make students aware of the important problem that corrosion generates at the industrial level, since corrosion damage causes large economic losses, which are equivalent to 3.4% of the global GDP [1]. Are we aware of this problem?. At this point, it is essential to strengthen theoretical knowledge of corrosion through electrochemical laboratory practice, combined with the use of commercial simulation programmes, which can contribute to a better understanding of corrosion damage to try to 'mitigate' its appearance This work presents a new teaching methodology, based on the Finite Elements analysis, in order to understand corrosion problems from university teaching.
Ponencia presentada en: 17th International Technology, Education and Development Conference,
Valencia, Spain. 6-8 March, 2023.
2023-01-01T00:00:00Z