Strength through high slip-plane density

Science ◽  
2021 ◽  
Vol 374 (6570) ◽  
pp. 940-941
Author(s):  
Jien-Wei Yeh
Keyword(s):  
Slip Plane

A reactive molecular dynamics study on the anisotropic sensitivity in single crystal α-cyclotetramethylene tetranitramine

RSC Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 8609-8621 ◽  
Author(s):  
Ting-Ting Zhou ◽  
Yan-Geng Zhang ◽  
Jian-Feng Lou ◽  
Hua-Jie Song ◽  
Feng-Lei Huang
Keyword(s):  
Molecular Dynamics ◽  
Single Crystal ◽  
Shock Compression ◽  
Slip Plane ◽  
Reactive Molecular Dynamics ◽  
Cyclotetramethylene Tetranitramine

Anisotropic sensitivity is related to the different intermolecular steric arrangements across the slip plane induced by shock compression along various orientations.

Slip plane dilation and disorder in a copper—aluminium alloy

1973 ◽  
Vol 18 (2) ◽  
pp. 427-438 ◽  
Author(s):  
L. M. Clarebrough
Keyword(s):  
Aluminium Alloy ◽  
Slip Plane

scholarly journals Probing anisotropic mechanical behaviour in carbamazepine form III

CrystEngComm ◽  
2021 ◽  
Author(s):  
Benjamin P. A. Gabriele ◽  
Craig J. Williams ◽  
Matthias E. Lauer ◽  
Brian Derby ◽  
Aurora J. Cruz-Cabeza
Keyword(s):  
Single Crystals ◽  
Slip Plane ◽  
Mechanical Behaviour ◽  
Molecular Simulations ◽  
Afm Imaging

Nanoindentation measurements in single crystals of carbamazepine form III show that the (020) face is stiffer and harder than the (002) and (101) faces. AFM imaging and molecular simulations reveal that the (020) plane is the most likely slip plane.

Simulated Crack and Slip Plane Propagation in Soil Slopes with Embedded Discontinuities Using XFEM

2018 ◽  
Vol 18 (12) ◽  
pp. 04018170 ◽  
Author(s):  
Xiangnan Wang ◽  
Peng Yu ◽  
Jialin Yu ◽  
Yuzhen Yu ◽  
He Lv
Keyword(s):  
Slip Plane ◽  
Embedded Discontinuities ◽  
Soil Slopes

Effect of Hydrostatic Pressure on Geometry of Slip in Silicon Iron Single Crystals

1983 ◽  
Vol 22 ◽  
Author(s):  
A.V. Dobromyslov ◽  
G.V. Dolgikh ◽  
N.I. Talutz ◽  
V.T. Shmatov ◽  
B. I. Beresnev
Keyword(s):  
Hydrostatic Pressure ◽  
Single Crystals ◽  
Slip Plane ◽  
Special Structure ◽  
Normal Stresses ◽  
Silicon Iron ◽  
Screw Dislocations ◽  
Effect Of Pressure ◽  
Effect Of Hydrostatic Pressure

ABSTRACTThe effect of the pressure 550MPa on the choice of the acting slip plane in the single crystals of Fe−2,9%Si was studied. It was established that the presence of pressure resulted in the increase of the slip asymmetry. The effect of pressure is attributed to the action of normal stresses and to the special structure of screw dislocations.

Orientation Dependent Strength and Cross-Slip Structure of Ordinary Dislocations in Single Crystal γ-Ti-56A1

1998 ◽  
Vol 552 ◽  
Author(s):  
Q. Feng ◽  
S. H.
Keyword(s):  
Single Crystal ◽  
High Temperatures ◽  
Slip Plane ◽  
Forward Direction ◽  
Orientation Dependence ◽  
Cross Slip ◽  
Dislocation Loops ◽  
Single Slip ◽  
Anomalous Hardening ◽  
Double Cross

ABSTRACTThe temperature as well as orientation dependence in anomalous hardening occurs in single crystal Ti-56AI between 673K and 1073K under single slip of ordinary dislocations. The ordinary dislocations (1/2<110]) are gliding not only on (111) plane but also on (110) plane in the temperature range where the anomalous hardening occurs in single crystal Ti-56A1. The TEM study shows that the (110) cross-slip of ordinary dislocations is a double cross-slip in nature in which first, the dislocations cross-slip from the primary (111) slip plane to (110) plane followed by cross-slipping again onto another primary slip plane. This double cross-slip leaves a pair of edge segments 'superjogs' in (110) planes. It appears that these superjogs are immobile in the forward direction and act as pinning points. Furthermore, these pinning points would act as a Frank-Read source for the double cross-slipped dislocations, which generate dislocation loops as well as dislocation dipoles. The pinning structure, multiplane dislocation loops, and dipoles of double cross-slip origin all contribute to anomalous hardening at high temperatures in this material.

scholarly journals Unsteady Stokes flow near boundaries: the point-particle approximation and the method of reflections

2018 ◽  
Vol 841 ◽  
pp. 883-924 ◽  
Author(s):  
A. Simha ◽  
J. Mo ◽  
P. J. Morrison
Keyword(s):  
Brownian Motion ◽  
Slip Plane ◽  
Metallic Nanoparticles ◽  
Particle Density ◽  
Point Particle ◽  
Plane Boundary ◽  
Short Time Scale ◽  
Approximation Techniques ◽  
Numerical Predictions ◽  
Particle Approximation

Problems of particle dynamics involving unsteady Stokes flows in confined geometries are typically harder to solve than their steady counterparts. Approximation techniques are often the only resort. Felderhof (see e.g. J. Phys. Chem. B, vol. 109 (45), 2005, pp. 21406–21412; J. Fluid Mech., vol. 637, 2009, pp. 285–303) has developed a point-particle approximation framework to solve such problems, especially in the context of Brownian motion. Despite excellent agreement with past experiments, this framework produces unsteady drag coefficients that depend on particle density. This is inconsistent, since the problem can be formulated mathematically without any reference to the particle’s density. We address this inconsistency in our work. Upon implementing our modifications, the framework passes consistency checks that it previously failed. Further, it is not obvious that such an approximation should work for short-time-scale motion. We investigate its validity by deriving it from a general formalism based on integral equations through a series of systematic approximations. We also compare results from the point-particle framework against a calculation performed using the method of reflections, for the specific case of a sphere near a full-slip plane boundary. We find from our analysis that the reasons for the success of the point-particle approximation are subtle and have to do with the nature of the unsteady Oseen tensor. Finally, we provide numerical predictions for Brownian motion near a full-slip and a no-slip plane wall based on the point-particle approximation as used by Felderhof, our modified point-particle approximation and the method of reflections. We show that our modifications to Felderhof’s framework would become significant for systems of metallic nanoparticles in liquids.

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