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| Naji, M. |
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| Petrov, R. H. | Madrid |
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Quinta Da Fonseca, João
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (76/76 displayed)
- 2023A novel integrated framework for reproducible formability predictions using virtual materials testingcitations
- 2023The role of hydrides and precipitates on the strain localisation behaviour in a zirconium alloycitations
- 2023Mapping Plastic Deformation Mechanisms in AZ31 Magnesium Alloy at the Nanoscalecitations
- 2022Optimising large-area crystal orientation mapping of nanoscale β phase in α + β titanium alloys using EBSDcitations
- 2022Slip activity during low-stress cold creep deformation in a near-α titanium alloycitations
- 2021The Effect of Loading Direction on Slip and Twinning in an Irradiated Zirconium Alloycitations
- 2021Quantifying Processing Map Uncertainties by Modeling the Hot-Compression Behavior of a Zr-2.5Nb Alloycitations
- 2021Co-deformation and dynamic annealing effects on the texture development during alpha–beta processing of a model Zr-Nb alloycitations
- 2021Co-deformation and dynamic annealing effects on the texture development during alpha–beta processing of a model Zr-Nb alloycitations
- 2021Understanding the role of local texture variation on slip activity in a two-phase titanium alloycitations
- 2021Understanding the role of local texture variation on slip activity in a two-phase titanium alloycitations
- 2020A statistical study of the relationship between plastic strain and lattice misorientation on the surface of a deformed Ni-based superalloy
- 2020On the Observation of Annealing Twins during Simulating β-Grain Refinement in Ti-6Al-4V High Deposition Rate AM with In-Process Deformationcitations
- 2020Comparison of sub-grain scale digital image correlation calculated using commercial and open-source software packagescitations
- 2020Element segregation and α2 formation in primary α of a near-α Ti-alloy
- 2020Measurement of local plastic strain during uniaxial reversed loading of nickel alloy 625
- 2019A detailed study of texture changes during alpha–beta processing of a zirconium alloycitations
- 2019A detailed study of texture changes during alpha–beta processing of a zirconium alloycitations
- 2019UNDERSTANDING THE EFFECT OF STRAIN LOCALIZATION ON CORROSION FATIGUE OF TYPE 304 AUSTENITIC STAINLESS STEELS IN HIGH TEMPERATURE WATER
- 2019Characterisation of irradiation enhanced strain localisation in a zirconium alloycitations
- 2019Characterisation of irradiation enhanced strain localisation in a zirconium alloycitations
- 2019Identification of active slip mode in a hexagonal material by correlative scanning electron microscopycitations
- 2019Identification of active slip mode in a hexagonal material by correlative scanning electron microscopycitations
- 2019Comparing local deformation measurements to predictions from crystal plasticity during reverse loading of an aerospace alloy
- 2019The effect of cold work on the transformation kinetics and texture of a zirconium alloy during fast thermal cyclingcitations
- 2019The effect of cold work on the transformation kinetics and texture of a zirconium alloy during fast thermal cyclingcitations
- 2019On the work hardening of titaniumcitations
- 2018Predicting the flow stress of Zircaloy-4 under in-reactor accident conditionscitations
- 2018Back-stresses and geometrical hardening as competing mechanisms enhancing ductility in HCP metalscitations
- 2018Back-stresses and geometrical hardening as competing mechanisms enhancing ductility in HCP metalscitations
- 2018Enabling high resolution strain mapping in zirconium alloyscitations
- 2018Enabling high resolution strain mapping in zirconium alloyscitations
- 2018Quantification of strain localisation in a bimodal two-phase titanium alloycitations
- 2018Quantification of strain localisation in a bimodal two-phase titanium alloycitations
- 2018On the ductility of alpha titanium: The effect of temperature and deformation modecitations
- 2018On the ductility of alpha titanium: The effect of temperature and deformation modecitations
- 2017Microscopic strain localisation in Ti-6Al-4V during uniaxial tensile loadingcitations
- 2017Discontinuous yielding in wrought magnesiumcitations
- 2017Effect of nanoscale α2precipitation on strain localisation in a two-phase Ti-alloycitations
- 2017Measurement and Modelling of Textures in Flow Formed Cr-Mo-V Steel Tubescitations
- 2017How magnesium accommodates local deformation incompatibility: a high-resolution digital image correlation studycitations
- 2016THE EFFECT OF ALUMINIUM ON DEFORMATION AND TWINNING IN ALPHA TITANIUM: THE ND CASEcitations
- 2016THE EFFECT OF ALUMINIUM ON DEFORMATION AND TWINNING IN ALPHA TITANIUM: THE ND CASEcitations
- 20163D characterisation of early twin formation in Ti-4Al by diffraction contrast tomography
- 20163D characterisation of early twin formation in Ti-4Al by diffraction contrast tomography
- 2015Microstructure and texture evolution during thermomechanical processing of β-quenched Zrcitations
- 2015Microstructure and texture evolution during thermomechanical processing of β-quenched Zrcitations
- 2014Characterization of abnormal grain coarsening in Alloy 718citations
- 2014Characterization of abnormal grain coarsening in Alloy 718citations
- 2013Texture and microstructure evolution of a zirconium alloy during uniaxial compression at 500°ccitations
- 2013Constituent particles and dispersoids in an Al-Mn-Fe-Si alloy studied in three-dimensions by serial sectioningcitations
- 2013Plastic Strain Mapping with Sub-micron Resolution Using Digital Image Correlationcitations
- 2013The effect of temperature on the formability of a high strength aluminium automotive alloy
- 2012Effect of β grain growth on variant selection and texture memory effect during α → β → α phase transformation in Ti-6 Al-4 vcitations
- 2012Deformation behaviour of an advanced nickel-based superalloy studied by neutron diffraction and electron microscopycitations
- 2012The influence of rolling temperature on texture evolution and variant selection during α → β → α phase transformation in Ti-6Al-4Vcitations
- 2012Influence of temperature upon the texture evolution and mechanical behaviour of Zircaloy-4
- 2012Influence of temperature upon the texture evolution and mechanical behaviour of Zircaloy-4
- 2012Macro and intergranular stress responses of austenitic stainless steel to 90° strain path changescitations
- 2011Microstructural investigation on the effect of cold work on environmentally assisted cracking of austenitic stainless steel
- 2011The effect of lattice misfit on deformation mechanisms at high temperaturecitations
- 2010Twinning in structural material with a hexagonal close-packed crystal structurecitations
- 2010Towards modelling intergranular stress-corrosion cracks using experimentally obtained grain topologiescitations
- 2009Texture memory and variant selection during phase transformation of a zirconium alloycitations
- 2009Capturing the texture changes in a zirconium alloy during the allotropic phase transformationcitations
- 2009Determination and interpretation of texture evolution during deformation of a zirconium alloy
- 2008Introducing heterogeneity into brittle fracture modeling of a 22NiMoCr37 ferritic steel ring forgingcitations
- 2008Grain-scale heterogeneity effect on mechanistic modelling of cleavage fracture of a ferritic rpv steel forging materialcitations
- 2007Measurement and modelling of residual stress effects on crackscitations
- 2006Evolution of intergranular stresses during in situ straining of IF steel with different grain sizescitations
- 2005Full-field strain mapping by optical correlation of micrographs acquired during deformationcitations
- 2005Evolution of internal stresses during the plastic deformation of if steel and their correlation with crystal orientation
- 2004Texture development in the cold rolling of IF steelcitations
- 2004Synchrotron diffraction investigation of the distribution and influence of residual stresses in fatiguecitations
- 2004Local strain imaging during mechanical loading of lamellar microstructures in titanium based alloys
- 2002Image processing issues in digital strain mappingcitations
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article
How magnesium accommodates local deformation incompatibility: a high-resolution digital image correlation study
Abstract
The plastic deformation of single crystal magnesium is strongly anisotropic. This gives rise to deformation incompatibilities between grains during polycrystalline deformation, which are thought to limit ductility and formability. Wrought polycrystalline magnesium alloys are far from brittle, especially in uniaxial tension, implying that these incompatibilities can be accommodated to some extent, although it is not clear how. We have used high-resolution digital image correlation (HRDIC), supported by electron backscatter diffraction (EBSD), to study quantitatively and at the microstructural scale the accommodation of deformation incompatibility in the AZ31 magnesium alloy. Using a new gold remodelling procedure that improves the spatial resolution to 44 nm, we quantified the deformation heterogeneity after a small stretch in uniaxial tension. Our results confirm that polycrystalline deformation is very heterogeneous, with local axial true strains at grain boundaries 32 times higher than the applied average strain of 0. 027, and 18 times higher at slip bands within grains. The local and macroscopic deformation gradients are very different in character as well as magnitude. The resultant deformation incompatibility is accommodated primarily by gradients in basal slip and the activation of difficult slip in “hard” grains, giving rise to grain breakup, with a smaller contribution by enhanced grain boundary shear and twinning. These results imply that a homogeneous distribution of “hard” and “soft” grains can prevent the development of strain localization and therefore, that controlling texture and microtexture is a powerful way of enhancing the formability of magnesium alloys without reducing their single crystal plastic anisotropy.