Journal ArticleDOI
Steps, dislocations and disconnections as interface defects relating to structure and phase transformations
John P. Hirth,R.C. Pond +1 more
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In this article, a new definition of scalar step heights is presented in terms of crystallographic parameters, where the dislocation portion is associated with the long-range strain field and shape change, and the step portion with divergences in diffusional fluxes associated with growth.About:
This article is published in Acta Materialia.The article was published on 1996-12-01. It has received 390 citations till now. The article focuses on the topics: Dislocation & Burgers vector.read more
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Coupling grain boundary motion to shear deformation
TL;DR: In this paper, the coupling factor between the normal grain boundary (GB) motion and grain translations has been calculated by molecular dynamics simulations over the entire misorientation range and a wide range of temperatures, showing an abrupt switch from one branch to another at a tilt angle of about 35°.
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Atomistic modeling of interfaces and their impact on microstructure and properties
Yuri Mishin,Mark Asta,Ju Li +2 more
TL;DR: An overview of the most recent developments in the area of atomistic modeling with emphasis on interfaces and their impact on microstructure and properties of materials is given in this paper, along with some challenges and future research directions in this field.
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(1¯012) Twinning nucleation mechanisms in hexagonal-close-packed crystals
TL;DR: In this article, two twinning mechanisms for hexagonal-close-packed crystals at an atomic scale were studied using topological analysis and atomistic simulations, and the results show that the zonal-twinning mechanism is energetically favorable relative to the normal-twin mechanism, because the Zn dislocation has a smaller Burgers vector.
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Ultrafast electron microscopy in materials science, biology, and chemistry
Wayne E. King,Geoffrey H. Campbell,Alan M. Frank,Bryan W. Reed,John Schmerge,Bradley J. Siwick,Brent C. Stuart,Peter M. Weber +7 more
TL;DR: The use of pump-probe experiments to study complex transient events has been an area of significant interest in materials science, biology, and chemistry as discussed by the authors, and there is a significant and growing interest in using electrons as probes.
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Size Effects on Magnetic Actuation in Ni-Mn-Ga Shape-Memory Alloys
David C. Dunand,Peter Müllner +1 more
TL;DR: Process, micro- and macrostructure, and magneto-mechanical properties of Ni-Mn-Ga powders, fibers, ribbons and films with one or more small dimension are reviewed, which are amenable to the growth of bamboo grains leading to large MFIS, and "constructs" from these structural elements are proposed.
References
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Book
Theory of Dislocations
John Price Hirth,Jens Lothe +1 more
TL;DR: Dislocations in Isotropic Continua: Effects of Crystal Structure on Dislocations and Dislocation-Point-Defect Interactions at Finite temperatures.
Book
Dislocations in solids
TL;DR: In this article, Bertotti, Ferro, and Mazetti proposed a theory of dislocation drag in covalent crystals and formed a model of the formation and evolution of dislocations during irradiation.
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The structure of nearly coherent fcc: bcc boundaries in a CuCr alloy
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LXXXIII. Crystal dislocations.—Elementary concepts and definitions
TL;DR: In this article, the basic concepts of crystal dislocation theory are defined in a manner independent of particular crystal lattices or models or special orientations of the dislocation, and it is shown how their essential properties arise, in so far as they are independent of the particular crystal in which they occur.
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Atomic mechanisms of precipitate plate growth
TL;DR: In this article, high-resolution transmission electron microscopy, image simulation, energy-dispersive X-ray spectroscopy and convergent-beam electron diffraction are used to characterize the atomic structure, chemistry and growth mechanisms of γ' plate-shaped precipitates in an Al-4·2 at.c.% Ag alloy aged for 30min at 350°C.