scholarly journals Transmission Electron Microscopy of Substructures Formed During High-Temperature Creep in Al-Mg Alloys

1974 ◽  
Vol 38 (11) ◽  
pp. 1071-1076 ◽  
Author(s):  
Nobuo Matsuno ◽  
Hiroshi Oikawa ◽  
Seiichi Karashima
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Temperature ◽  
Mg Alloys ◽  
High Temperature Creep ◽  
Temperature Creep ◽  
Transmission Electron ◽  
Al Mg Alloys

High temperature creep and transmission electron microscopy of GaAs

1991 ◽  
Vol 137 ◽  
pp. 173-176 ◽  
Author(s):  
R. Behrensmeier ◽  
H.G. Brion ◽  
H. Siethoff ◽  
P. Veyssière ◽  
P. Haasen
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Temperature ◽  
High Temperature Creep ◽  
Temperature Creep ◽  
Transmission Electron

scholarly journals Dislocation Mechanisms during High Temperature Creep Experiments on MC2 Alloy

2011 ◽  
Vol 278 ◽  
pp. 7-12 ◽  
Author(s):  
Fabienne Touratier ◽  
Bernard Viguier ◽  
Christophe Siret ◽  
Sandrine Lesterlin ◽  
Eric Andrieu
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Temperature ◽  
Creep Rate ◽  
Applied Load ◽  
Creep Behaviour ◽  
High Temperature Creep ◽  
Simple Diffusion ◽  
Transmission Electron ◽  
Schmid Factor

The creep behaviour of MC2 single crystal superalloy has been studied at 1150°C/80 MPa, with an applied load along [001] axis. The resulting dislocation microstructures were examined by transmission electron microscopy. The occurrence of a[010] type dislocations (with a zero Schmid factor) within the ordered γ' precipitates is often observed. It is shown that those dislocations moved by a climb process, based on a mechanism involving two dislocation systems and vacancy exchanges, as proposed in the literature. We calculate the vacancy fluxes associated with such a mechanism and show that the vacancy transportation can be easily insured by a simple diffusion process. This calculation shows that the diffusion and climbing steps do not seem to be the creep rate controlling mechanisms for those situations in MC2 alloy.

scholarly journals Some aspects of microstructure and properties of Al-Mg alloys after shear spinning and cold rolling

2013 ◽  
Vol 67 (5) ◽  
pp. 707-714 ◽  
Author(s):  
Ljubica Radovic ◽  
Milutin Nikacevic ◽  
Branka Jordovic
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Cold Rolling ◽  
Dynamic Recovery ◽  
Mg Alloys ◽  
Transmission Electron ◽  
Cold Rolled ◽  
Mg Content ◽  
Shear Spinning ◽  
Al Mg Alloys

Three commercial Al-Mg alloys containing 3 wt.% to 6 wt.% of Mg (AlMg3, AlMg4.5Mn and AlMg6Mn) were subjected to different forming processes: shear spinning and cold rolling. The effect of Mg content and reduction in thickness on the tensile properties and microstructure evolution of Al-Mg alloys were studied. Both optical (OM) and transmission electron microscopy (TEM) were used for the microstructure characterization. The results show that the addition of Mg in these alloys increases the yield strength (YS) and ultimate tensile strength (UTS) in both cold rolled and spun specimens. The strength of all Al-Mg alloys after shear spinning was lower compared to the strength after cold rolling for the same strain. This effect was attributed to the occurrence of dynamic recovery during shear spinning and confirmed by transmission electron microscopy.

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