Exploració per tema "Dislocations"
Ara es mostren els items 1-18 de 18
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A constitutive model for the anelastic behavior of Advanced High Strength Steels
(CIMNE, 2015)
Text en actes de congrés
Accés obertIn this work a physically based model describing the anelastic behaviour and nonlinear unloading in Advanced High Strength Steels (AHSS) is proposed. The model is fitted to the experimental data obtained from uni-axial ... -
Cálculo eficiente de las energías de formación de escalones dobles en materiales BCC
(Universitat Politècnica de Catalunya. CIMNE, 2013)
Article
Accés obertEn materiales con estructura cristalina BCC el movimiento de dislocaciones de tipo tornillo a baja temperatura está asociado con la formación y el crecimiento de escalones en la línea de la dislocación. Para entender la ... -
Classical and quantum simulations of dislocations in crystals
(Universitat Politècnica de Catalunya, 2016-10-17)
Treball Final de Grau
Accés obert
Realitzat a/amb: University of New South Wales -
Comparison of a low carbon steel processed by Cold Rolling (CR) and Asymmetrical Rolling (ASR): Heterogeneity in strain path, texture, microstructure and mechanical properties
(Elsevier, 2021-04)
Article
Accés obertA low carbon steel was processed by Cold Rolling (CR) and Asymmetrical Rolling (ASR) at room temperature until 200 µm thickness reduction using multiple rolling passes of 25 µm. ASR process induced a soft curvature with a ... -
Ductility and plasticity of ferritic-pearlitic steel after severe plastic deformation
(2021-02-23)
Article
Accés obertA ferritic-pearlitic steel was subjected to severe plastic deformation (SPD) through Equal Channel Angular Pressing (ECAP) at room temperature, obtaining strengths greater than 1 GPa. Steel constituents were identified by ... -
Effect of loading mode on the microstructural heterogeneity of ultra-fine-grained iron
(2021-12-01)
Article
Accés obertThis manuscript analyzes the microstructural changes introduced by both monotonic tensile and cyclic loads in ultrafine-grained Armco iron obtained after severe plastic deformation by equal channel angular pressing. The ... -
Effect of microstructural heterogeneity on the balanced-biaxial and tensile behavior of a Zn alloy sheet
(Elsevier, 2022-03)
Article
Accés obertA 0.65 mm thick Zn sheet was processed at room temperature by equal channel angular sheet extrusion (ECASE), which allowed for the fabrication of a heterogeneous material. The processed sheet's heterogeneity manifested as ... -
Geometrically Necessary Dislocations (GNDs) in iron processed by Equal Channel Angular Pressing (ECAP)
(2019-03)
Article
Accés obertThe calculation of Geometrically Necessary Dislocations (GNDs) in iron processed by ECAP has been carried out via Electron Back Scatter-Diffraction (EBSD) and Transmission Electron Microscopy (TEM). Transmission microscopy ... -
Grain boundary mediated plasticity: the role of grain boundary atomic structure and thermal activation
(2018-03)
Article
Accés obertThe interaction of dislocation pile-ups with several tilt grain boundaries (GB) is studied in copper by using a hybrid continuum-atomistic approach. The effects of temperature, pile-up intensity and GB structure on absorption ... -
Heterogeneity of strain path, texture and microstructure evolution of AA6063-T6 processed by Equal Channel Angular Sheet Extrusion (ECASE)
(2018-11)
Article
Accés obertAn Aluminum alloy 6063T6 was processed at room temperature by Equal Channel Angular Sheet Extrusion (ECASE). Microstructure evolution was investigated by Electron Back Scattering Diffraction (EBSD), and X-ray diffraction ... -
Mechanical and microstructural behavior of a heterogeneous austenitic stainless steel processed by Equal Channel Angular Sheet Extrusion (ECASE)
(2020-08)
Article
Accés obertA sheet-shaped austenitic stainless steel (ASS) was processed by one ECASE pass. In this way, larger deformations were introduced close to the sheet edge vicinities, while the middle zone remained less affected by the ... -
Microstructural and mechanical study in the plastic zone of ARMCO iron processed by ECAP
(2017-06-14)
Article
Accés obertPlastic deformation of ARMCO iron processed by ECAP up to a maximum equivalent strain of sixteen (i.e., 1, 4, 8, and 16 ECAP passes) following route Bc was investigated by analyzing its microstructure and the stress-strain ... -
Non-diffusional growth mechanism of I1 basal stacking-faults inside twins in hcp metals
(2019-11)
Article
Accés obertDeformation twins in magnesium exhibit considerable densities of I1 basal-plane stacking-faults. Since these faults generally transect their host twin, they presumably lengthen concommitantly with boundary migration during ... -
Review of non-classical features of deformation twinning in hcp metals and their description by disconnection mechanisms
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-09)
Article
Accés obertThe study of deformation twinning has long history. However new, sometimes surprising, findings have shown that the phenomenon of deformation twinning still is not completely understood. The study of deformation twinning ... -
Strain hardening and dislocation avalanches in micrometer-sized dimensions
(2015-06-01)
Article
Accés obertPresent experiments and computational simulations furnish a fundamental background to the understanding of plastic flow across sample sizes. It is shown that self-organized criticality (SOC) governs the size distribution ... -
Study of the internal stresses in the capsular bag after the implantation of an intraocular lens and the causes of its dislocation
(Universitat Politècnica de Catalunya, 2017-11)
Treball Final de Grau
Accés obertCataract surgery is very common and the majority of these surgeries are successful and are really fast. However, some people who are operated of cataracts have problems after a while (after 5-7 years or more): they suffer ... -
Thermal stability of ARMCO iron processed by ECAP
(2018-10-01)
Article
Accés obertThe thermal stability of ARMCO iron processed by equal-channel angular pressing (ECAP) up to a true strain of 16 was investigated by differential scanning calorimetry (DSC). Particularly, the analysis was focused on deriving ... -
Understanding imprint formation, plastic instabilities and hardness evolutions in FCC, BCC and HCP metal surfaces
(2021-09)
Article
Accés obertNanoindentation experiments in metal surfaces are characterized by the onset of plastic instabilities along with the development of permanent nanoimprints and dense defect networks. This investigation concerns massive ...