The Forces Exerted on Dislocations and the Stress Fields Produced by Them

Peach, M. O.; Koehler, J. S.

doi:10.1103/physrev.80.436

Cited by 870 publications

(309 citation statements)

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“…These long-range strain fields result in the movement of defects. For instance, dislocations with opposite Burgers vectors attract each other and collide [40,41,42]. Upon collision they either annihilate each other or they form a tightly bound, metastable dislocation pair.…”

Section: √Nmentioning

confidence: 99%

Kinetics of directed self-assembly of block copolymers on chemically patterned substrates

Müller

Rey

et al. 2015

J. Phys.: Conf. Ser.

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Section: √Nmentioning

confidence: 99%

Kinetics of directed self-assembly of block copolymers on chemically patterned substrates

Müller

Rey

et al. 2015

J. Phys.: Conf. Ser.

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“…Using experimental value of the viscosity at the critical shear rate, η  0.06 Pa s, the mobility at the limit can be estimated to be M ~ 10 -5 m 2 s kg -1 . the velocity of the dislocation at the limit is further given by the mobility M and the shear stress at the critical shear rate, v lim = Mσ [36]. the critical shear rate is evaluated by dividing the limiting velocity with the sample thickness (250 μm).…”

Section: Origin Of the Critical Shear Ratementioning

confidence: 99%

Kinetics of the orientation transition in the lyotropic lamellar phase

Fujii

Yamamoto

2016

J Biorheol

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Kinetics of the orientation transition in the triblock copolymer lamellar phase is studied by viscometry. We find that the strain-controlled mechanism dominates the transition kinetics. We propose a possible scenario of the orientation transition from the viewpoint of the dislocation dynamics. We could also evaluate the critical shear rate of the orientation transition by assuming the limiting velocity of the dislocations under shear. evaluated value is in good agreement with the experimental observation. the nucleation of the dislocations might be necessary for the orientation transition.

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“…Force acting on the dislocation can be evaluated by the Peach-Kohler equation 16) and an equilibrium shape of the dislocation under applied shear stress¸is obtained by solving the following force-balance equation:…”

Section: )mentioning

confidence: 99%

Selected Topics on Material Strength and Thermally Activated Deformation Processes

Kato

2015

Mater. Trans.

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Thermally activated deformation processes are discussed with reference to the studies done by the present author and his coworkers. First, dislocation motion in one-and two-dimensional periodic stress fields is analyzed to understand the deformation mechanisms of bcc metals and spinodally decomposed alloys. The role of the thermally activated kink-pair formation on the temperature and strain-rate dependence of strength is also discussed. Secondly, diffusion-controlled processes pertinent to high-temperature deformation are discussed by applying a unified and fundamental rate equation derived previously. Thirdly, mechanisms for the temperature and strain-rate dependence of polycrystals and ultrafinegrained and nanocrystalline materials are introduced. A proposed model taking into account the thermally activated dislocation depinning at grain boundaries is discussed.

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The Forces Exerted on Dislocations and the Stress Fields Produced by Them

Cited by 870 publications

References 2 publications

Kinetics of directed self-assembly of block copolymers on chemically patterned substrates

Kinetics of directed self-assembly of block copolymers on chemically patterned substrates

Kinetics of the orientation transition in the lyotropic lamellar phase

Selected Topics on Material Strength and Thermally Activated Deformation Processes

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