Showing papers in "International Journal of Plasticity in 2019"

TL;DR: In this paper, a detailed atomic-scale mechanism of the dynamic continuous microstructural evolution has been performed, to limit the achievement of bulk dual-phase high-entropy alloys with the improved strength and toughness.

TL;DR: In this article, rotationally accelerated shot peening was used to introduce different gradient hierarchical microstructures, including gradients in twin and dislocation densities, and hierarchical nanotwin, into a CoCrFeNiMn HEA by adjusting the processing parameters.

TL;DR: In this article, tensile testing of an extruded Mg−0.47 wt% Ca alloy was conducted inside a scanning electron microscope, and electron backscattered diffraction-based slip trace analysis was performed to study in-grain slip activities at 1, 2, 4, 8, and 16% tensile strain.

TL;DR: In this article, the tensile properties of AM 316L stainless steels fabricated by the laser powder-bed-fusion (L-PBF) technique were examined and reported.

TL;DR: In this paper, a nonequiatomic Cr20Fe6Co34Ni34Mo6 alloy with single-phase face-centered cubic (FCC) structure was fabricated and immediately cold-rolled with ∼70% thickness reduction after a liquid nitrogen bath.

TL;DR: In this article, the authors investigated the storage of geometrically necessary (GND) and statistically stored (SSD) dislocations in a nickel-based superalloy.

TL;DR: In this paper, a dislocation mechanism based size-dependent crystal plasticity model was developed to study the role of microstructure gradient in the overall plastic response, where multiple dislocation evolution mechanisms were considered.

TL;DR: In this paper, the effect of gradient interfaces on mechanical behavior was investigated in a laminated Cu-30Zn sample composed of coarse-grained and ultrafine grained layers, and tensile tests revealed a superior strength-ductility synergy with extraordinary strengthening and work hardening.

TL;DR: In this article, a modified Johnson-Cook plasticity model is developed to capture the observed unconventional effect of the strain rate and temperature on the hardening response for DP800 steel.

TL;DR: In this paper, an artificial neural network (ANN) model is coupled with a rate-dependant crystal plasticity finite element method (CPFEM) formulation to predict the stress-strain behavior and texture evolution in AA6063-T6 under uniaxial tension and simple shear.

TL;DR: A review of the theoretical developments by several research groups and their applications to the finite element method is presented in this article, where a review of various experimental methodologies to study the size effects is presented.

TL;DR: In this article, statistical, dynamical, and multifractal modeling and analyses were performed on the stress-time series to characterize and model the stress drop behavior of an Al0.5CoCrCuFeNi high-entropy alloy (HEA).

TL;DR: In this paper, the Luster-Morris m'parameter was used to assess the likelihood of slip transfer across boundaries in annealed polycrystalline Al foils deformed in uniaxial tension.

TL;DR: In this paper, the authors investigated tensile deformation of a medical grade NiTi wire in a wide temperature range from −100°C to 450°C and found that the deformation was caused by the activity of a new deformation mechanism -stress induced B2=>B19´=>B2T martensitic transformation into twinned austenite coupled with dislocation slip.

TL;DR: In this article, the effect of nanoscale precipitation and its influence on the strengthening mechanisms in low-carbon ultra-high-strength steel, hot-rolled at different temperatures and subjected to various isothermal aging conditions, is studied.

TL;DR: In this article, flash-annealing is used to modify the free volume content and its distribution, which creates nonaffine stress fields in a monolithic CuZr-based bulk metallic glass.

TL;DR: In this paper, a multi-level constitutive model for polycrystalline metals that deform by a combination of elasticity, crystallographic slip, and deformation twinning is proposed to interpret the deformation behavior of alloy WE43 as a function of strain rate.

TL;DR: In this paper, a single crystal model was proposed to represent the essential features of the three materials accounting for dislocation interactions and representation of grain size via a simple Hall-Petch type term.

TL;DR: In this paper, the effect of the properties of the coated materials on the local and global responses of a battery cell was analyzed by the Drucker-Prager/Cap plasticity model, which is carefully calibrated through axial and lateral compression tests and closed-die compaction test.

TL;DR: In this article, the reaction of grain boundaries with lattice dislocations is a key component in hydrogen embrittlement mechanism for polycrystalline metals, and the authors use atomistic modeling methods to investigate the mechanical response of GBs in alpha-iron with various hydrogen concentrations.

TL;DR: In this article, the cyclic mechanical characters of 316L stainless steel at elevated temperature are extensively investigated by the experimental and cyclic constitutive models. And the authors proved that the proposed model is proved to effectively describe the complex evolution of not only cyclic stress amplitude but also hysteresis loops for the 316L steel.

TL;DR: In this article, the effect of grain size and grain shape on the flow stress in model copper grains was investigated and a simple model was proposed to account for the grain shape influence on the grain size effect.

TL;DR: In this article, the authors investigated the intergranular deformation behavior and its effect on the overall ductility of a Mg-Gd-Y alloy, using in-situ tension in scanning electron microscopy (SEM) combined with electron backscattered diffraction (EBSD) and digital image correlation (DIC) techniques.

TL;DR: In this paper, author is thankful to University of Aberdeen for the award of Elphinstone Scholarship which covers the tuition fee of PhD study of author, thanks are also due to Professor R.M. McMeeking for useful discussions.

TL;DR: In this paper, a combined experimental and numerical study was presented to provide the understanding of deformation mechanisms and stresses in Mg AZ31B alloy across scales, from macro-scale (Type I) to micro- (intergranular, Type II) and nano-scale(intra-granular and Type III).

TL;DR: In this paper, the Stoughton and Yoon (2009) criterion was used to model the anisotropic/asymmetry-induced distortion of the yield surface of metal sheets.

TL;DR: In this paper, a large-scale CP-FEM simulations of single crystals and polycrystals are conducted to study mesh sensitivity in CP-fEM models, such as initial textures, hardening models and boundary conditions are investigated.

TL;DR: In this article, uniaxial compression tests were performed on graphene (reduced graphene oxide, RGO)-Al nanolaminated composite micro-pillars with different RGO in-plane sizes and laminate orientations.

TL;DR: In this article, quasi-in situ tensile unloading and electron backscatter diffraction (EBSD)-based slip trace analysis were applied to study the room-temperature deformation behaviour of Ti 22Al 25Nb alloys with three different microstructures and the plastic deformation mechanism of the B2, α2, and O phases.

TL;DR: In this article, temperature dependent mechanical properties of conventional and additive manufactured Inconel 718 (IN718) after solution and aging (SA) heat treatment were measured at room temperature, 350°C, and 650 °C.