scholarly journals Influence of the Grain Size of High-Purity Aluminium on the Electrostatic Properties of Electrolytic Condenser

1954 ◽  
Vol 18 (12) ◽  
pp. 614-617
Author(s):  
Yuzo Nakamura ◽  
Motoi Nishisaka
Keyword(s):  
Grain Size ◽  
High Purity ◽  
Electrostatic Properties ◽  
Purity Aluminium ◽  
High Purity Aluminium

Effect of Forging Temperature on Deformability and Structure Evolution of High Purity Aluminium during Multi-Directional Forging Process

2016 ◽  
Vol 877 ◽  
pp. 371-379 ◽  
Author(s):  
Qing Feng Zhu ◽  
Jia Wang ◽  
Lei Li ◽  
Chun Yan Ban ◽  
Zhi Hao Zhao ◽  
...  
Keyword(s):  
Grain Size ◽  
High Purity ◽  
Recrystallization Temperature ◽  
Structure Evolution ◽  
Inhomogeneous Deformation ◽  
Forging Process ◽  
Fine Grain ◽  
Sample Shape ◽  
Purity Aluminium ◽  
High Purity Aluminium

The effects of final forging temperatures on deformability and structure evolution of high purity aluminum during multi-directional forging process were investigated. The results showed that increasing the initial forging temperature is beneficial for controlling the sample shape in the initial forging passes. Recrystallization during the initial forging passes improves the deformability of the sample in the following low-temperature forging processes. An X-shape fine grain zone is formed in the sample due to the inhomogeneous deformation of multi-directional forging process. When the forging pass is 6, the final forging temperature has an important influence on the grain size in the fine grain zone. The grain size decreases from 302 μm to 60 μm with the final forging temperature decreasing from 310 °C to 65 °C. The X-shape fine grain zone caused by the inhomogeneous deformation cannot be eliminated by increasing the final forging temperature (even higher than the recrystallization temperature of high purity aluminium).

Effect of grain size on corrosion of high purity aluminium

2011 ◽  
Vol 56 (4) ◽  
pp. 1729-1736 ◽  
Author(s):  
K.D. Ralston ◽  
D. Fabijanic ◽  
N. Birbilis
Keyword(s):  
Grain Size ◽  
High Purity ◽  
Purity Aluminium ◽  
High Purity Aluminium

Study on New Extrusion Route of Equal Channel Angular Processing in High Purity Aluminium

2015 ◽  
Vol 1094 ◽  
pp. 343-347
Author(s):  
Chun Yan Ban ◽  
Zhen Yao ◽  
Hai Tao Gao ◽  
Si Xu Zhu ◽  
Ya Ping Guo ◽  
...  
Keyword(s):  
Grain Size ◽  
High Purity ◽  
Intersection Angle ◽  
Cast Ingot ◽  
Equal Channel Angular Processing ◽  
Ecap Process ◽  
Purity Aluminium ◽  
Average Grain Size ◽  
High Purity Aluminium ◽  
High Purity Aluminum

The new extrusion route of ECAP which is called route 135 was put forward in this paper. The grain refinement of the traditional extrusion route BCand the new route of ECAP process in 99.9995% (5N5) high purity aluminum was compared using a die with a channel-intersection angle 90°. It was found through experiment that, the grain was very coarse in the cast ingot of 5N5 high purity aluminum, and the average grain size is about 60mm. High purity aluminum processed by one pass ECAP was refined notably, and average grain size is about 1000 μm. After two ECAP passes, the average grain size is 200μm with route BC, while it is less than 50μm with route 135. The refinement of two passes of route 135 is equivalent to the refinement of eight passes of route BC. It indicates that the route 135 is more effective than route BC. TEM micrograph of 5N5 high purity Al with different ECAP pass under route BCand route 135 was studied.

Shape rheocasting of high purity aluminium

2011 ◽  
Vol 64 (6) ◽  
pp. 479-482 ◽  
Author(s):  
U.A. Curle ◽  
H. Möller ◽  
J.D. Wilkins
Keyword(s):  
High Purity ◽  
Purity Aluminium ◽  
High Purity Aluminium

Recrystallization of high-purity aluminium during equal channel angular pressing

2007 ◽  
Vol 55 (7) ◽  
pp. 2211-2218 ◽  
Author(s):  
W. Skrotzki ◽  
N. Scheerbaum ◽  
C.-G. Oertel ◽  
H.-G. Brokmeier ◽  
S. Suwas ◽  
...  
Keyword(s):  
Equal Channel Angular Pressing ◽  
High Purity ◽  
Angular Pressing ◽  
Purity Aluminium ◽  
High Purity Aluminium

Further evidence for the presence of residual flaws in a thin oxide layer covering high purity aluminium

1993 ◽  
Vol 34 (12) ◽  
pp. 2099-2104 ◽  
Author(s):  
G.M. Brown ◽  
K. Shimizu ◽  
K. Kobayashi ◽  
G.E. Thompson ◽  
G.C. Wood
Keyword(s):  
Oxide Layer ◽  
High Purity ◽  
Thin Oxide Layer ◽  
Purity Aluminium ◽  
High Purity Aluminium ◽  
Thin Oxide

Structure Development during ECAP and Subsequent Creep of Aluminium

2007 ◽  
Vol 539-543 ◽  
pp. 493-498 ◽  
Author(s):  
Ivan Saxl ◽  
Vàclav Sklenička ◽  
L. Ilucová ◽  
Milan Svoboda ◽  
Petr Král
Keyword(s):  
High Purity ◽  
Grain Orientation ◽  
Orientation Imaging Microscopy ◽  
Structural Inhomogeneity ◽  
Structure Development ◽  
Creep Fracture ◽  
Orientation Imaging ◽  
Purity Aluminium ◽  
High Purity Aluminium ◽  
Creep Loading

Considerable structural inhomogeneity and anisotropy were found even after eight ECAP passes in high purity aluminium and the creep loading of ECAP material at 473K, 15MPa resulted in scattered fracture times ~ 20-60 hours. The structure revealed by orientation imaging microscopy with different disclination bounds was analysed by stereological methods. The effect of inhomogeneity and grain orientation on the creep fracture time was assessed.

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