Fragmentation, Texturing and Plastic Flow in the Subsurface of Friction-Processed Copper Single Crystal

Copper single crystals grown according to the Bridgman method and having their axes [] or [11 aligned with the normal load axis were processed by dry sliding. As shown, sliding-induced severe plastic deformation occurred in the subsurface of single crystals and caused formation of a lip by mechanism of texture formation. The SEM structure of this lip was found to be composed of fragments with their shapes dependent on the single crystal orientation with respect to normal load and friction force.

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THE EFFECT OF ADDITION AGENTS ON CATHODE POLARIZATION DURING ELECTRODEPOSITION OF COPPER AT SINGLE CRYSTAL COPPER CATHODES

Canadian Journal of Chemistry ◽

10.1139/v55-218 ◽

1955 ◽

Vol 33 (12) ◽

pp. 1756-1767

Author(s):

K. Ekler ◽

C. A. Winkler

Keyword(s):

Steady State ◽

Single Crystal ◽

Single Crystals ◽

Linear Relation ◽

Crystal Orientation ◽

Chloride Ion ◽

Addition Agent ◽

Cathode Polarization ◽

Single Crystal Copper ◽

Copper Single Crystals

The polarization–time relations for the initial (Pi), maximum (Pmax), and pseudo-steady-state (Ps) polarizations on copper single crystals in the absence and presence of gelatin and gelatin plus chloride ion were found to depend upon crystal orientation. The Pi and Pmax in the absence of gelatin, the Pi in its presence, and the static potentials were all similarly related to the reticular density. The Pi increased, and the time to maximum polarization (tmax) decreased, with increase of current density; the relations between these quantities showed marked differences for the different crystals. The variation with reticular density of Pi and Pmax in the absence of addition agents and of Pi in its presence probably represents differences in activation overpotential at the various crystal faces. The adsorption of gelatin on different crystal faces was also found to be markedly different. Polarization in the presence of gelatin was decreased by small amounts of chloride ion; a linear relation for all the crystals used was obtained by plotting the increase in polarization caused by gelatin against the decrease caused by 2 mgm./liter chloride ion in the presence of gelatin. In the absence of addition agent, change of acid concentration from 50 to 200 gm./liter had no effect on Pi and addition of chloride ion had no effect on Ps at single crystal cathodes.

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Microstructure and Texture of Hydrostatic Extrusion Deformed Ni Single Crystals and Polycrystal

Advances in Materials Science and Engineering ◽

10.1155/2015/613839 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7 ◽

Cited By ~ 3

Author(s):

D. Jakubowska ◽

J. Zdunek ◽

M. Kulczyk ◽

J. Mizera ◽

K. J. Kurzydłowski

Keyword(s):

Mechanical Properties ◽

Plastic Deformation ◽

Severe Plastic Deformation ◽

Single Crystal ◽

Single Crystals ◽

Relevant Literature ◽

Hydrostatic Extrusion ◽

Total Deformation ◽

Polycrystalline Nickel ◽

Before And After

The differences in the microstructure and texture of two Ni single crystals, with different initial orientations (100and110), and of polycrystalline nickel, before and after severe plastic deformation (SPD) produced by hydrostatic extrusion (HE), have been investigated. The crystals were deformed by a two-step HE process with a total deformation value ofε=1.2. The global texture, mechanical properties, and microstructure were examined after the deformation. In every investigated sample, the presence of111fibre texture was noted, while the starting orientation of a100Ni single crystal was preserved in 50% of the volume. The results obtained were compared with the relevant literature data.

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STRUCTURE OF A NI3AL SINGLE CRYSTAL AFTER SEVERE PLASTIC DEFORMATION

Автометрия ◽

10.15372/aut20190204 ◽

2019 ◽

Keyword(s):

Plastic Deformation ◽

Severe Plastic Deformation ◽

Single Crystal

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Prediction of Crystallographic Texture Formation in Polycrystalline Samples under Severe Plastic Deformation Based on a Two-Level Statistical Elasto-Viscoplastic Model

Physical Mesomechanics ◽

10.1134/s1029959921030012 ◽

2021 ◽

Vol 24 (3) ◽

pp. 225-236

Author(s):

K. V. Ostapovich ◽

P. V. Trusov ◽

A. Yu. Yants

Keyword(s):

Plastic Deformation ◽

Severe Plastic Deformation ◽

Crystallographic Texture ◽

Texture Formation ◽

Viscoplastic Model

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Electrical Resistivity Study of Lattice Defects Formed during Plastic Deformation of Copper Single Crystals

physica status solidi (b) ◽

10.1002/pssb.2220600226 ◽

1973 ◽

Vol 60 (2) ◽

pp. 707-711 ◽

Cited By ~ 4

Author(s):

O. Buck ◽

D. Schumacher ◽

A. Seeger

Keyword(s):

Plastic Deformation ◽

Electrical Resistivity ◽

Single Crystals ◽

Lattice Defects ◽

Resistivity Study ◽

Copper Single Crystals ◽

Electrical Resistivity Study

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A Continuum Model for Single Crystal Cyclic Plasticity

MRS Proceedings ◽

10.1557/proc-779-w5.30 ◽

2003 ◽

Vol 779 ◽

Author(s):

Biqiang Xu ◽

Yanyao Jiang

Keyword(s):

Single Crystal ◽

Single Crystals ◽

Kinematic Hardening ◽

Strain Curve ◽

Cyclic Behavior ◽

Cyclic Plasticity ◽

Amplitude Dependence ◽

Slip Systems ◽

Stress Strain ◽

Copper Single Crystals

AbstractA constitutive model was developed to bridge the cyclic plasticity behavior of single crystals and the corresponding characteristic dislocation structures. Yield and flow were built on the individual slip systems. The Armstrong-Frederick kinematic hardening rule was invoked to capture the Bauschinger effect. A material memory parameter was introduced to consider the amplitude dependence of cyclic hardening. Latent hardening considering the interactions among the slip systems was used to describe the anisotropic cyclic behavior. The experimental results of copper single crystals were used to validate the model developed. It was found that the model was able to adequately describe the well-known three distinctive regions in the cyclic stress-strain curve of the FCC single crystal oriented for single slip and the associated dislocation substructures. The model was capable of capturing the enhanced hardening observed in copper single crystals in multi-slip orientations. For a given loading history, the model can predict not only the saturated stress-strain response but also the detailed evolution of the transient cyclic behavior. The characteristic dislocation structures can be featured with the slip evolution.

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The critical shear stress of mercury single crystals

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1937.0209 ◽

1937 ◽

Vol 163 (912) ◽

pp. 34-53 ◽

Cited By ~ 4

Keyword(s):

Plastic Deformation ◽

Shear Stress ◽

Melting Point ◽

Single Crystal ◽

Single Crystals ◽

Critical Shear Stress ◽

Impurity Content ◽

Thermal Agitation ◽

Plastic Yield ◽

Metal Single Crystals

The influence of very small quantities of impurity on the critical shear stress of metal single crystals has an important bearing on the mechanism of their plastic deformation. For investigations in this field, mercury is a very suitable metal: its impurity content can easily be reduced to an extremely low level (Hulett 1911) and it contains no dissolved gases (Hulett 1911). Also, as first pointed out by Andrade (1914), single crystal wires of this metal can be prepared without difficulty. The low melting point of mercury (-38∙8° C.) is far from being a disadvantage. The crystals can be maintained at -60° C., and at a temperature so near the melting point the thermal agitation may be expected to accentuate phenomena not observable at lower temperatures, if such agitation plays the important part in the mechanism of glide ascribed to it (Taylor 1934; Polanyi 1934; Orowan 1934). As a possible instance of this, the experiments to be described have revealed the existence of a preliminary “set” preceding the true plastic yield. Widely differing forms of slip band have also been observed, and are described elsewhere (Greenland 1937). It is hoped that these results will throw further light on the mechanism of glide.

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On the Plastic Deformation of Copper Single Crystals. Part 1. Two Stages in the Progress of Deformation

Journal of the Physical Society of Japan ◽

10.1143/jpsj.6.454 ◽

1951 ◽

Vol 6 (6) ◽

pp. 454-455 ◽

Cited By ~ 2

Author(s):

Hiroshi Kanzaki

Keyword(s):

Plastic Deformation ◽

Single Crystals ◽

Copper Single Crystals ◽

Two Stages

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Orientation Dependence of Ductility of Mg Single Crystals at Elevated Temperature

Materials Science Forum ◽

10.4028/www.scientific.net/msf.488-489.193 ◽

2005 ◽

Vol 488-489 ◽

pp. 193-196 ◽

Cited By ~ 2

Author(s):

Hiromi Miura ◽

Taku Sakai ◽

H. Nogawa ◽

Xu Yue Yang ◽

Yoshimi Watanabe ◽

...

Keyword(s):

Single Crystal ◽

Single Crystals ◽

Crystal Orientation ◽

Fracture Strain ◽

Orientation Dependence ◽

High Temperature Deformation ◽

Temperature Deformation ◽

High Ductility ◽

Superplastic Behavior ◽

Strong Orientation

Orientation-controlled Mg single crystals were tensile tested at temperatures between 473 K and 673 K at a strain rate of 4.2 x 10-4 s-1 in vacuum. Though all the single crystals showed high ductility compared with that of polycrystals, the ductility of the single crystals strongly depended on the crystal orientation. The [27 -1 -26 1] single crystal showed 0.57 fracture strain, while the [3 8 -11 -1] single crystal showed superplastic behavior of ductility over 1.8 strain. The observed strong orientation dependence of ductility seemed to be caused by orientation dependence of ease occurrence of dynamic recrystallization (DRX) in the single crystals during high-temperature deformation. The orientation dependence of ductility of Mg single crystals will be discussed in detail concerning crystallographical orientations of the single crystals, occurrence of DRX and fracture.

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