Results 11 to 20 of about 191,305 (291)
Study on the Microscopic Mechanism of Axle Steel EA4T during Uniaxial Cyclic Deformation Process
Metals, 2023 In order to reveal the dislocation evolution law of body-centered cubic axle steel EA4T during cyclic deformation and provide an experimental basis for the subsequent construction of cyclic constitutive models based on microscopic physical mechanisms ...
Xuehong Ren +3 more
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Multiferroicity Induced by Dislocated Spin-Density Waves [PDF]
Physical Review Letters, 2007 We uncover a new pathway towards multiferroicity, showing how magnetism can drive ferroelectricity without relying on inversion symmetry breaking of the magnetic ordering. Our free-energy analysis demonstrates that any commensurate spin-density-wave ordering with a phase dislocation, even if it is collinear, gives rise to an electric polarization.
Betouras, J.J. +2 more
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Mn content optimum on microstructures and mechanical behavior of Fe-based medium entropy alloys
Materials & Design, 2022 Fe-XMn-5Si-10Cr-0.9C (X = 10, 15, 20, and 25 wt%) medium entropy alloys (MEAs) with different Mn contents were prepared by magnetic suspension melting in a water-cooled copper crucible, and casted in a negative pressure suction copper mould. The modified
Yanchun Zhao +7 more
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Microstructural Evolution along the NiCrMoV Steel Welded Joints Induced by Low-Cycle Fatigue Damage
Metals, 2021 The degradation of mechanical properties of materials is essentially related to microstructural changes under service loadings, while the inhomogeneous degradation behaviors along welded joints are not well understood.
Shuo Weng +3 more
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Annihilation and sources in continuum dislocation dynamics
Materials Theory, 2018 Continuum dislocation dynamics (CDD) aims at representing the evolution of systems of curved and connected dislocation lines in terms of density-like field variables. Here we discuss how the processes of dislocation multiplication and annihilation can be
Mehran Monavari, Michael Zaiser
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Forces in Mechanics, 2022 The blanket module of nuclear fusion reactor is proposed to be made of reduced activation ferritic martensitic (RAFM) steel. Thus, in order to prevent the unprecedented failure, the creep response of RAFM steel must be studied meticulously.
Nilesh Kumar +3 more
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Dislocations Jam at Any Density
Physical Review Letters, 2011 Crystalline materials deform in an intermittent way via dislocation-slip avalanches. Below a critical stress, the dislocations are jammed within their glide plane due to long-range elastic interactions and the material exhibits plastic response, while above this critical stress the dislocations are mobile (the unjammed phase) and the material fails. We
Tsekenis, Georgios +2 more
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Mechanical Engineering Journal, 2018 In this study, we investigated the mechanism of the indentation size effect based on measurement of the geometrically necessary (GN) dislocation density. The GN dislocation density was measured around impressions by electron backscatter diffraction (EBSD)
Shota HASUNUMA +3 more
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Predicting Dislocation Density in Martensite Ab-Initio
SSRN Electronic Journal, 2022 The high dislocation density (ρd) in Fe-C and/or Fe-N martensite is known to be one of the main causes of its overall yield strength. Experiments indicate that the dislocation density and, therefore, the yield strength of martensite in low and medium C steels, follows a well defined behavior with respect to the background concentration of C (c0).
Predrag Andric +2 more
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Journal of Materials Research and Technology, 2023 We investigated the ferrite recrystallization behavior of pure iron with different dislocation characters. Two types of specimens with almost the same dislocation densities and different dislocation characters were prepared.
Kotaro Iguchi +3 more
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