Mechanism for the formation of shear bands with (hhl) orientation of boundaries in single crystals with an FCC lattice

1997 ◽  
Vol 40 (5) ◽  
pp. 440-447
Author(s):  
M. P. Kashchenko ◽  
L. A. Teplyakova
Keyword(s):  
Single Crystals ◽  
Shear Bands ◽  
Fcc Lattice

Computersimulation der Rückstreuung schneller schwerer Ionen an einkristallinen (001)-und (111̅)-Goldoberflächen / Computer Simulation of the Backscattering of High Energy Ions from (001)- and (111̅)-surfaces of Au-Single Crystals

1976 ◽  
Vol 31 (3-4) ◽  
pp. 316-326 ◽  
Author(s):  
H. Schmidt ◽  
K. Güttner
Keyword(s):  
Computer Simulation ◽  
Computer Program ◽  
Single Crystals ◽  
Grazing Incidence ◽  
High Energy ◽  
Rapid Decrease ◽  
Fcc Lattice ◽  
High Energy Ions

A computer program for following the trajectories of high energy ions in an fcc-lattice has been written to evaluate the reflection rate of high energy ions with grazing incidence to (001)- and (111̅)-Au-surfaces. The calculation yields a rapid decrease of the reflection rate for penetration directions close to low-index atomic planes. It can be shown that this result is caused by channeling of the ions between the atomic planes.

Fatigue-induced shear bands in ferritic single crystals

1982 ◽  
Vol 30 (1) ◽  
pp. 273-278 ◽  
Author(s):  
T. Magnin ◽  
A. Fourdeux ◽  
J.H. Driver
Keyword(s):  
Single Crystals ◽  
Shear Bands

scholarly journals The Development of Dislocation Structure and Texture in Rolled Copper (001)[110] Single Crystals

1988 ◽  
Vol 10 (1) ◽  
pp. 67-75 ◽  
Author(s):  
M. Wróbel ◽  
S. Dymek ◽  
M. Blicharski ◽  
S. Gorczyca
Keyword(s):  
Electron Microscopy ◽  
Single Crystals ◽  
Dislocation Structure ◽  
Transverse Direction ◽  
Shear Bands ◽  
Taylor Factor ◽  
Initial Orientation ◽  
Slip Systems ◽  
Deformation Bands ◽  
Pole Figures

The initial orientation has split into two equally strong symmetric orientations: (112)[111¯] and (112)[1¯1¯1]. Areas of identical orientation were band shaped and were called deformation bands. Up to 60% reduction, deformation occurs by slip on one plane (one from two possible) in two directions. This leads to the appearance of deformation bands with transition bands between them. Due to such deformation the initial orientation rotates around transverse direction towards the end-orientation {112}〈111〉. Due to rotation of the crystallographic lattice with deformation, the Taylor factor M changes as well, and it causes the activation of two not coplanar slip systems which stabilize the end-orientations {112}〈111〉. Such a sequence of the slip systems activation was concluded from the agreement of the calculated and experimental pole figures. The electron microscopy investigations showed that first shear bands formed due to the activation of these new slip systems.

Orientation of boundaries of planar shear bands in Ni3Fe single crystals

1997 ◽  
Vol 40 (8) ◽  
pp. 764-768 ◽  
Author(s):  
M. P. Kashchenko ◽  
L. A. Teplyakova ◽  
L. V. Lychagin ◽  
A. V. Paul'
Keyword(s):  
Single Crystals ◽  
Shear Bands ◽  
Planar Shear

Microstructure and Texture of Magnesium Single Crystals Processed by ECAP

2010 ◽  
Vol 667-669 ◽  
pp. 355-360
Author(s):  
Petra Šedá ◽  
Aleš Jäger ◽  
Pavel Lejček
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Single Crystals ◽  
Shear Bands ◽  
Face Centered Cubic ◽  
Hexagonal Close Packed ◽  
Angular Pressing ◽  
Ultrafine Grained ◽  
Face Centered ◽  
Mechanical Twins

Equal channel angular pressing (ECAP) is a promising severe plastic deformation technique for production of ultrafine-grained bulk metals with face centered cubic (fcc) structure. However, the process is often complicated in hexagonal close packed (hcp) metals such as magnesium due to its low forming capability. In this contribution, magnesium single crystals were processed by ECAP through a single pass in order to reveal processes taking place in hcp lattice during severe plastic deformation. The microstructure and texture were investigated by SEM-EBSD. The deformed microstructure contains shear bands, recrystallized regions and mechanical twins. Activity of twinning systems and texture formation are discussed regarding different initial orientation of the single crystals.

Shear bands and microstructure of Al single crystals during rolling

1985 ◽  
Vol 19 (2) ◽  
pp. 185-188 ◽  
Author(s):  
K. Morii ◽  
Y. Nakayama
Keyword(s):  
Single Crystals ◽  
Shear Bands
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