Rocket observations of banded structure in waves near the Langmuir frequency in the auroral ionosphere

1999 ◽  
Vol 104 (A12) ◽  
pp. 28109-28122 ◽  
Author(s):  
K. L. McAdams ◽  
J. LaBelle ◽  
M. L. Trimpi ◽  
P. M. Kintner ◽  
R. A. Arnoldy
Keyword(s):  
Auroral Ionosphere ◽  
Banded Structure ◽  
Langmuir Frequency

VI. Concluding Remarks

1890 ◽  
Vol 7 (4) ◽  
pp. 168-168
Keyword(s):  
Banded Structure ◽  
The Common ◽  
Interesting Area

I cannot conclude this paper without remarking that none of the views therein are held dogmatically, and expressing the hope that former observers will renew their attention, and fresh ones take up the investigation of this complicated, yet interesting area. The difficulties are great, among which is the origin of the banded structure, in the rocks herein dealt with, which in my next paper I shall try to explain on the grounds of segregation, arising from, or taking place during the cooling of the common magma out of which all these rocks seem to me to have been formed.

The Method of Eliminating Banded Structure and the Effects of Banded Structure on the Transverse Properties in 20G Steel

2013 ◽  
Vol 347-350 ◽  
pp. 1171-1175 ◽  
Author(s):  
Bin Wang ◽  
Hong Mei Hu ◽  
Cui Zhou
Keyword(s):  
Heat Treatment ◽  
Grain Size ◽  
Stress Concentration ◽  
Base Metal ◽  
Metallic Inclusion ◽  
Banded Structure ◽  
Grain Sizes ◽  
Fine Grain ◽  
Treatment Processes ◽  
Metallic Inclusions

The transverse properties were inferior to the longitudinal properties for the existence of banded structure in 20G steel. In order to eliminate the banded structure and improve the transverse performance of 20G steel, different heat treatment processes were adopted. The results showed that conventional normalizing could reduce the banded structure and refine the grain sizes. When 20G was heated with 10°C/min heating rated and then held at 920°C for 2h, the banded structure in the steel was almost eliminated and the microstructure was homogeneous with fine grain size, the strength increased by 14%. The non-metallic inclusion and carbide in the microstructure leaded to stress concentration and separation with the base metal. To some extent, heat treatment can improve the distribution and form of non-metallic inclusions.

About the banded structure in rapidly solidified dendritic and eutectic alloys

1992 ◽  
Vol 40 (5) ◽  
pp. 983-996 ◽  
Author(s):  
M. Carrard ◽  
M. Gremaud ◽  
M. Zimmermann ◽  
W. Kurz
Keyword(s):  
Eutectic Alloys ◽  
Banded Structure ◽  
Rapidly Solidified

Influence of Banded Structure on the Properties of Petroleum Pipe Steel and its Rating Analysis Method

2021 ◽  
Vol 1035 ◽  
pp. 492-498
Author(s):  
Ke Tong ◽  
Qing Liu ◽  
Bo Zhu ◽  
Shen Cong ◽  
Xu Ying Kang
Keyword(s):  
Pipe Steel ◽  
Pipeline Steel ◽  
Analysis Method ◽  
Banded Structure ◽  
Current Standards ◽  
Application Scope

The influence of banded structure on the performance of petroleum pipe was introduced firstly, and the characteristics and application scope of different rating methods of banded structure studied, and the banded structure in different specimens rated using this standards/methods. The banded structure rating of petroleum pipe steel requires proper and reasonable standards/methods for different microstructures. The current standards/methods could not integrate standard diagram comparison with calculation, and can not cover the banded structure rating for all pipeline steel microstructures. Therefore, in order to satisfy the inspection needs of petroleum pipe steel, a new rating standard is required to be established.

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