Results 11 to 20 of about 52,903 (306)
Modeling of extra strengthening in gradient nanotwinned metals based on molecular dynamics
Frontiers in Materials, 2022 Gradient nanotwinned metals exhibit extra strengthening and work hardening behaviors, which have enormous potential for engineering applications. In this study, molecular dynamics method is performed for analyzing the effects of nanotwinned structure ...
Zailin Yang +6 more
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Metals, 2022 Gradient nano-grained (GNG) metals have shown high synergetic strength and good ductility due to their unique gradient microstructure. In this study, the mechanical behavior of gradient nano-grained metals was investigated by three-dimensional discrete ...
Songjiang Lu +4 more
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Discrete dislocation simulations and size dependent hardening in single slip [PDF]
, 1998 Plastic deformation in two-dimensional monophase and composite materials is studied using a discrete dislocation dynamics method. In this method, dislocations are represented by line defects in a linear elastic medium, and their interactions with ...
Cleveringa, H., +2 more
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Simultaneous strength-ductility enhancement in as-cast Ti6Al4V alloy by trace Ce
Materials & Design, 2022 Impurity elements always play a major role in hindering mechanical property improvement in Ti6Al4V, and specifically most of them e.g. O, P, Cl, and S dissolved in the matrix deteriorate the mechanical properties of Ti6Al4V. This work presents a strategy
K.M. Li +7 more
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Strain-gradient effect on the crack tip dislocations density
Fracture and Structural Integrity, 2020 In this study, the influence of a material’s plastic properties on the crack tip fields and dislocation density behavior is analytically and numerically analyzed using the conventional mechanism-based strain-gradient plasticity (CMSGP) theory established
Valery Shlyannikov +2 more
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Journal of Materials Research and Technology, 2023 Heterostructured materials offer great promise as next-generation structural materials, providing excellent combinations of strength and elongation. However, the need for additional equipment for heterostructuring poses challenges for scalability.
Gang Hee Gu +5 more
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Journal of Structural Geology, 2017 This study presents the first use of high-angular resolution electron backscatter diffraction (HR-EBSD) to quantitatively characterise geometrically necessary dislocations in quartz subgrain structures. HR-EBSD exploits cross-correlation of diffraction patterns to measure intragranular misorientations with precision on the order of 0.01° with well ...
D. Wallis, A. Parsons, L. Hansen
semanticscholar +3 more sources
Crystals, 2020 In a recent experimental study of indentation creep, the strain rate sensitivity (SRS) and activation volume v* have been noticed to be dependent on the indentation depth or loading force for face-centered cubic materials.
Xiazi Xiao, Hao Liu, Long Yu
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Resolving geometrically necessary dislocation density onto individual dislocation types using EBSD-based continuum dislocation microscopy [PDF]
International Journal of Plasticity, 2016 Abstract Modeling of plasticity is often hampered by the difficulty in accurately characterizing dislocation density on the microscale for real samples. It is particularly difficult to resolve measured dislocation content onto individual dislocation types at the length scales most commonly of interest in plasticity studies.
T.J. Ruggles, D.T. Fullwood, J.W. Kysar
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Evolution of geometrically necessary dislocation density from computational dislocation dynamics
IOP Conference Series: Materials Science and Engineering, 2009 This paper presents a method for calculating GND densities in dislocation dynamics simulations. Evolution of suitably defined averages of GND density as well as maps showing the spatial nonuniform distribution of GNDs are analyzed under uniaxial loading.
P J Guruprasad, A A Benzerga
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