2026-04-28T03:08:30Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/56682024-04-12T11:43:37Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505

Díaz Portugal, Andrés 147 500 0000-0002-2344-1955 Alegre Calderón, Jesús Manuel 16 500 0000-0003-3629-2570 Cuesta Segura, Isidoro Iván 135 500 0000-0003-4088-9302 Zhang, Zhiliang 340389cd-b5dd-40a1-b044-15f7405aa0e3 600 2021-03-24T12:57:17Z 2021-03-24T12:57:17Z 2019-12 0020-7403 http://hdl.handle.net/10259/5668 10.1016/j.ijmecsci.2019.105176 Assuming that hydrogen enhances localised plasticity, as one of the leading mechanisms proposed in the literature, the void growth and coalescence are modified by local softening and ductile failure features depend on hydrogen accumulation. It is anticipated that strain rate plays an important role in hydrogen-informed void mechanisms, however, coupling voids, transient hydrogen diffusion, rate-dependent hydrogen-material interactions and intrinsic hardening, remains a challenge. In this study, the simulation of a void unit cell in a hydrogen pre-charged material is reconsidered here for the first time to incorporate transient effects, i.e. the kinetic redistribution of hydrogen around a void subjected to a high strain rate and a constant stress triaxiality. A coupled diffusion-mechanics scheme is implemented in a set of ABAQUS subroutines in order to analyse the interaction of hydrogen with the material response. The influence of strain rate is also considered when defining the cell boundary conditions through the limiting cases of equilibrium and insulated unit cells. The competition between the two inherent mechanisms, namely, hydrogen softening and strain rate hardening, is studied with the implemented framework. Results show that transient effects determine hydrogen concentrations and strongly dictate failure mechanisms: shearing might occur due to the hydrogen induced softening for moderate strain rates even though the cell is insulated. However, for very fast loading it is demonstrated that the fast creation of traps due to plastic deformation results in hydrogen depletion and necking failure is observed. MINECO Refs: MAT2014-58738-C3-2-R and RTI2018-096070-B-C33 application/pdf eng Elsevier International Journal of Mechanical Sciences. 2019, V. 164, 105176 https://doi.org/10.1016/j.ijmecsci.2019.105176 info:eu-repo/grantAgreement/MINECO/MAT2014-58738-C3-2-R info:eu-repo/grantAgreement/MINECO/RTI2018-096070-B-C33. info:eu-repo/grantAgreement/UBU/UBU 2016: 12MA-461AA-487.01 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Hydrogen embrittlement Hydrogen diffusion Void growth Unit cell simulations Resistencia de materiales Strength of materials Numerical study of hydrogen influence on void growth at low triaxialities considering transient effects info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion International Journal of Mechanical Sciences 164 105176 TEXT Diaz-ijms_2019.pdf.txt Diaz-ijms_2019.pdf.txt Extracted text text/plain 75400 https://riubu.ubu.es/bitstream/10259/5668/5/Diaz-ijms_2019.pdf.txt f00e0b10650ba0f05d31143955b1d13e MD5 5 THUMBNAIL Diaz-ijms_2019.pdf.jpg Diaz-ijms_2019.pdf.jpg IM Thumbnail image/jpeg 4296 https://riubu.ubu.es/bitstream/10259/5668/4/Diaz-ijms_2019.pdf.jpg a29abcf110543a423384b793a5ed263c MD5 4 LICENSE license.txt license.txt text/plain; charset=utf-8 999 https://riubu.ubu.es/bitstream/10259/5668/3/license.txt b295bcbce42e2caabeb0c623d3860c06 MD5 3 CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 805 https://riubu.ubu.es/bitstream/10259/5668/2/license_rdf 4460e5956bc1d1639be9ae6146a50347 MD5 2 ORIGINAL Diaz-ijms_2019.pdf Diaz-ijms_2019.pdf application/pdf 2610199 https://riubu.ubu.es/bitstream/10259/5668/1/Diaz-ijms_2019.pdf 162d7b0ad5be5b10141ef00204d4040f MD5 1 10259/5668 oai:riubu.ubu.es:10259/5668 2024-04-12 13:43:37.457 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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