The Influence of the Superconducting Phase Transition on the Plastic Properties of Metals and Alloys

Kostorz, G.

doi:10.1002/pssb.2220580102

Cited by 63 publications

(5 citation statements)

References 64 publications

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“…The influence of the electric field on the plastic deformation of metals is known as electroplasticity. [ 314 ] This effect was found to affect the flow stress, [ 315,316 ] stress relaxation, [ 317 ] time‐dependent plastic deformation (creep), [ 317 ] and dislocation generation and their mobility, [ 318 ] fracture, [ 319 ] and fatigue. [ 320 ] Though several mechanisms such as localized Joule heating at the lattice defect and vacancy migration due to electron wind effects were proposed, the understanding remains poor.…”

Section: Applications Of Nano‐ecrmentioning

confidence: 99%

Understanding Nanoscale Plasticity by Quantitative In Situ Conductive Nanoindentation

2021

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Electronic materials such as semiconductors, piezo‐ and ferroelectrics, and metal oxides are primary constituents in sensing, actuation, nanoelectronics, memory, and energy systems. Although significant progress is evident in understanding the mechanical and electrical properties independently using conventional techniques, simultaneous and quantitative electromechanical characterization at the nanoscale using in situ techniques is scarce. It is essential because coupling/linking electrical signal to the nanoscale plasticity provides vital information regarding the real‐time electromechanical behavior of materials, which is crucial for developing miniaturized smarter technologies. With the advent of conductive nanoindentation, researchers have been able to get valuable insights into the nanoscale plasticity (otherwise not possible by conventional means) in a wide variety of bulk and small‐volume materials, quantify the electromechanical properties, understand the dielectric breakdown phenomenon and the nature of electrical contacts in thin films, etc., by continuously monitoring the real‐time electrical signal changes during any point on the indentation load–hold–unload cycle. This comprehensive Review covers probing the electromechanical behavior of materials using in situ conductive nanoindentation, data analysis methods, the validity of the models and limitations, and electronic conduction mechanisms at the nanocontacts, quantification of resistive components, applications, progress, and existing issues, and provides a futuristic outlook.

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Section: Applications Of Nano‐ecrmentioning

confidence: 99%

Understanding Nanoscale Plasticity by Quantitative In Situ Conductive Nanoindentation

2021

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“…(The small changes of Fc at the transition due to the changes of the elastic constants and the specific volume can be neglected. 1) Let us assume that for the motion of the dislocation in the glide plane under the action Of the shear stress ~ it is necessary to break through a planar network (with the cell L by L) of equally spaced defects of equal strength so that after a breakaway from a row of defects the dislocation approaches the next row with a velocity 1/0. In Refs.…”

Section: The Inertial Modelmentioning

confidence: 99%

Comparison of mechanisms of plasticity enhancement at the superconducting transition

Indenbom

Estrin

1975

J Low Temp Phys

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The mechanisms of the plasticity enhancement at the N-S transition are considered, based on a comparison of the dependence of this effect on the concentration of defects limiting the dislocation mobility, which, as is shown, is different for competing dynamic models. A method is suggested for determining the role of quasistatic effects, arising due to the inhomogeneity of the dislocation structure of superconductors, in the plasticity enhancement at the N-S transition.

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“…Efforts have also been made by Indenbom and Estrin to distinguish between different dynamic models of plasticity enhancement 23 . These experimental results and different theoretical interpretations were summarized and reviewed by Kostorz 24 . So far there is still a dearth of experimental evidence demonstrating the existence of dislocation inertial motion.…”

Section: Introductionmentioning

confidence: 99%

Uncovering the inertia of dislocation motion and negative mechanical response in crystals

Tang

2018

Sci Rep

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Dislocations are linear defects in crystals and their motion controls crystals’ mechanical behavior. The dissipative nature of dislocation propagation is generally accepted although the specific mechanisms are still not fully understood. The inertia, which is undoubtedly the nature of motion for particles with mass, seems much less convincing for configuration propagation. We utilize atomistic simulations in conditions that minimize dissipative effects to enable uncovering of the hidden nature of dislocation motion, in three typical model metals Mg, Cu and Ta. We find that, with less/no dissipation, dislocation motion is under-damped and explicitly inertial at both low and high velocities. The inertia of dislocation motion is intrinsic, and more fundamental than the dissipative nature. The inertia originates from the kinetic energy imparted from strain energy and stored in the moving core. Peculiar negative mechanical response associated with the inertia is also discovered. These findings shed light on the fundamental nature of dislocation motion, reveal the underlying physics, and provide a new physical explanation for phenomena relevant to high-velocity dislocations.

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The Influence of the Superconducting Phase Transition on the Plastic Properties of Metals and Alloys

Cited by 63 publications

References 64 publications

Understanding Nanoscale Plasticity by Quantitative In Situ Conductive Nanoindentation

Understanding Nanoscale Plasticity by Quantitative In Situ Conductive Nanoindentation

Comparison of mechanisms of plasticity enhancement at the superconducting transition

Uncovering the inertia of dislocation motion and negative mechanical response in crystals

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