scholarly journals Mechanical properties of EuBaCuO superconducting bulk material at liquid nitrogen temperature

2017 ◽  
Vol 871 ◽  
pp. 012055 ◽  
Author(s):  
A Murakami ◽  
A Iwamoto
Keyword(s):  
Mechanical Properties ◽  
Liquid Nitrogen ◽  
Bulk Material ◽  
Liquid Nitrogen Temperature

Effect of Rolling Temperature on Microstructure and Mechanical Properties of Cryorolled Al-Mg-Si Alloy Reinforced with 3wt% TiB2 In Situ Composite

2012 ◽  
Vol 584 ◽  
pp. 556-560 ◽  
Author(s):  
B. Gopi ◽  
N. Naga Krishna ◽  
K. Sivaprasad ◽  
K. Venkateswarlu
Keyword(s):  
Mechanical Properties ◽  
Liquid Nitrogen ◽  
Room Temperature ◽  
True Strain ◽  
Liquid Nitrogen Temperature ◽  
Tensile Tests ◽  
Rolling Temperature ◽  
Rolled Sample ◽  
Peak Broadening

The present work investigates the effect of rolling temperature on the mechanical properties and microstructural evolution of an Al-Mg-Si alloy with 3wt% TiB2 in-situ composite that was fabricated by stir casting route. The composite was rolled to a true strain of ≈0.7 at three different temperatures viz; room temperature (RT), liquid propanol (LP) and liquid nitrogen (LN) temperatures. Tensile tests revealed that the samples rolled at liquid nitrogen temperature exhibited improved properties compared to the samples rolled at other two temperatures. A tensile strength and ductility of 291 MPa and 8% respectively were exhibited by the liquid nitrogen rolled sample. The strength is observed to be ≈12% higher and ductility is ≈60% more when compared to the room temperature rolled sample. X ray diffraction peaks indicated that rolled samples exhibited considerable increase in peak broadening compared to the unrolled one, which is attributed to the increase of the lattice strain due to distortion and the decrease in grain size of the material. The enhanced mechanical properties of the liquid nitrogen rolled samples were attributed to the combined effect of grain refinement and accumulation of higher dislocation density.

Cryo-Rolling and Formability of 2024 Aluminium

2013 ◽  
Vol 765 ◽  
pp. 434-438 ◽  
Author(s):  
Adam S. Taylor ◽  
Matthias Weiss ◽  
Tim Hilditch ◽  
Peter D. Hodgson ◽  
Nicole Stanford
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Liquid Nitrogen ◽  
Heat Treating ◽  
Liquid Nitrogen Temperature ◽  
Rolling Process ◽  
Dome Height ◽  
Rolled Material ◽  
Heat Treated ◽  
Erichsen Cupping Test

Sheets of precipitate hardenable 2024 aluminium have been processed by rolling at liquid nitrogen temperature in order to refine the microstructure. A number of different aging/heat treating procedures have been utilised that have resulted in significantly different mechanical properties. The cryo-rolled material was heat treated at 150 °C for varying times and the resulting mechanical properties evaluated as a function of this holding time. The resulting properties were found to be strongly influenced by precipitates that formed either during the aging step, rolling process or the subsequent heat treatment. The formability of the cryo-rolled and heat treated material has been investigated using a limiting dome height test (Erichsen cupping test).

Compressive mechanical properties of Sm123 bulk superconductor at liquid nitrogen temperature

2005 ◽  
Vol 426-431 ◽  
pp. 644-648 ◽  
Author(s):  
A. Murakami ◽  
K. Katagiri ◽  
R. Kan ◽  
H. Miyata ◽  
Y. Shoji ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
Bulk Superconductor

Mechanical Properties of Gd123 Bulk Superconductor at Liquid Nitrogen Temperature

2004 ◽  
Vol 14 (2) ◽  
pp. 1050-1053 ◽  
Author(s):  
A. Murakami ◽  
K. Katagiri ◽  
K. Kasaba ◽  
Y. Shoji ◽  
K. Noto ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
Bulk Superconductor

Effect of Low Temperature Rolling on Microstructure and Properties of ECAE Processed Copper

2007 ◽  
Vol 550 ◽  
pp. 283-288
Author(s):  
J. Kusnierz
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Liquid Nitrogen ◽  
Room Temperature ◽  
Equal Channel Angular Extrusion ◽  
Shear Banding ◽  
Liquid Nitrogen Temperature ◽  
Fourth Pass ◽  
Initial Processing ◽  
Low Temperature Rolling

The changes in the tensile properties, in relation to the phenomenon of shear banding are investigated in copper, rolled at liquid nitrogen temperature and then recrystallized, after initial processing by Equal-Channel Angular Extrusion (ECAE) at room temperature. Increases in ductility and strength up to the fourth pass of ECAE processing were noted, then a decrease of both properties was observed. The decrease was accompanied by twinning and shear banding. In rolled samples, pre-cooled down to the temperature of liquid nitrogen and initially recrystallized, the twinning and shear banding mechanisms were the most probable mechanisms responsible for lowering the mechanical properties.

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