scholarly journals INTERNAL FRICTION STUDY OF THE HIGH TEMPERATURE DISLOCATION MOBILITY IN Si SINGLE CRYSTALS

1987 ◽  
Vol 48 (C8) ◽  
pp. C8-101-C8-106 ◽  
Author(s):  
P. GADAUD ◽  
J. WOIRGARD ◽  
P. MAZOT ◽  
J. L. DEMENET ◽  
J. de FOUQUET
Keyword(s):  
High Temperature ◽  
Internal Friction ◽  
Single Crystals ◽  
Dislocation Mobility ◽  
Friction Study

Influence of Dislocation Mobility on Room and High Temperature Ductility of -Oriented Nial Single Crystals

1994 ◽  
Vol 364 ◽  
Author(s):  
M. A. Morris ◽  
J. P. Perez ◽  
R. Darolia
Keyword(s):  
High Temperature ◽  
Single Crystals ◽  
Room Temperature ◽  
Tensile Tests ◽  
Slip Systems ◽  
Dislocation Mobility ◽  
Screw Dislocations ◽  
Large Density ◽  
Thin Foils

AbstractThe dislocation configurations produced by room and high temperature compression of <100> oriented single crystals of binary NiAl and in those containing iron and hafnium additions have been analysed and compared to those obtained by hardness indentation and TEM insitu tensile tests. Kinking occurs during room temperature compression such that <100> dislocations are activated in all cases but the iron-containing alloy also exhibited a large density of <111> screw dislocations. The latter however, appear immobile when they are created by hardness indentations of thin foils, while only pile-ups of <100> segments can propagate. Similarly, although different slip systems are present after high temperature compression, only <100> dislocation segments have been confirmed to be mobile after room temperature hardness indentation of these predeformed thin foils. The improvement in ductility observed at room temperature in the predeformed specimens of the binary and the iron containing alloys has been attributed to the increased production of these mobile <100> dislocations.

High‐Temperature Kilocycle Internal Friction in Al2O3 Single Crystals

1961 ◽  
Vol 32 (12) ◽  
pp. 2573-2579 ◽  
Author(s):  
R. J. Huber ◽  
G. S. Baker ◽  
P. Gibbs
Keyword(s):  
High Temperature ◽  
Internal Friction ◽  
Single Crystals

High-Temperature Internal Friction Peak in Al–0.008 wt% Sn Single Crystals

1990 ◽  
Vol 121 (2) ◽  
pp. 475-481 ◽  
Author(s):  
G. Y. Tian ◽  
J. Z. Lu ◽  
S. P. Wu ◽  
L. D. Zhang
Keyword(s):  
High Temperature ◽  
Internal Friction ◽  
Single Crystals ◽  
Internal Friction Peak
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