Modelling studies on effects of deformation speed, preform shape, and upset ratio on the forging characteristics of the aerospace structural Al alloys

2017 ◽  
Vol 54 (4) ◽  
pp. 291
Author(s):  
T. Ram Prabhu
Keyword(s):  
Al Alloys ◽  
Modelling Studies ◽  
Deformation Speed ◽  
Preform Shape

Observation of faint contrast at planar faults in alloys

1978 ◽  
Vol 36 (1) ◽  
pp. 340-341
Author(s):  
K. Kuroda ◽  
Y. Tomokiyo ◽  
T. Kumano ◽  
T. Eguchi
Keyword(s):  
Reciprocal Lattice ◽  
Beam Theory ◽  
Al Alloys ◽  
Small Displacement ◽  
Electron Microscopic ◽  
Lattice Vector ◽  
Fringe Contrast ◽  
Planar Fault ◽  
Lattice Displacement ◽  
The Many

The contrast in electron microscopic images of planar faults in a crystal is characterized by a phase factor , where is the reciprocal lattice vector of the operating reflection, and the lattice displacement due to the fault under consideration. Within the two-beam theory a planar fault with an integer value of is invisible, but a detectable contrast is expected when the many-beam dynamical effect is not negligibly small. A weak fringe contrast is also expected when differs slightly from an integer owing to an additional small displacement of the lattice across the fault. These faint contrasts are termed as many-beam contrasts in the former case, and as ε fringe contrasts in the latter. In the present work stacking faults in Cu-Al alloys and antiphase boundaries (APB) in CuZn, FeCo and Fe-Al alloys were observed under such conditions as mentioned above, and the results were compared with the image profiles of the faults calculated in the systematic ten-beam approximation.

Microstructure of an extruded rapidly solidified Al-8Fe-2Mo alloy

1986 ◽  
Vol 44 ◽  
pp. 548-549
Author(s):  
W. T. Donlon ◽  
J. E. Allison ◽  
S. Shinozaki
Keyword(s):  
Electron Microscopy ◽  
Automotive Industry ◽  
Fuel Economy ◽  
High Strength ◽  
Al Alloys ◽  
Light Weight ◽  
Thin Sections ◽  
Strength And Durability ◽  
Rapidly Solidified ◽  
Whitney Aircraft

Light weight materials which possess high strength and durability are being utilized by the automotive industry to increase fuel economy. Rapidly solidified (RS) Al alloys are currently being extensively studied for this purpose. In this investigation the microstructure of an extruded Al-8Fe-2Mo alloy, produced by Pratt & Whitney Aircraft, Goverment Products Div. was examined in a JE0L 2000FX AEM. Both electropolished thin sections, and extraction replicas were examined to characterize this material. The consolidation procedure for producing this material included a 9:1 extrusion at 340°C followed by a 16:1 extrusion at 400°C, utilizing RS powders which have also been characterized utilizing electron microscopy.

THE FORMATION OF VACANCIES IN ORDERED Fe-Al ALLOYS WITH B2 STRUCTURE

1977 ◽  
Vol 38 (C7) ◽  
pp. C7-364-C7-364 ◽  
Author(s):  
D. PARIS ◽  
P. LESBATS
Keyword(s):  
Al Alloys ◽  
B2 Structure

MÖSSBAUER STUDY ON RECOVERY OF COLD-WORKED Fe-Al ALLOYS

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-611-C2-612 ◽  
Author(s):  
K. Oki ◽  
S. Towata ◽  
M. Tamiya ◽  
T. Eguchi
Keyword(s):  
Al Alloys ◽  
Mössbauer Study ◽  
Cold Worked

AN INTERNAL FRICTION STUDY OF THE MECHANISM OF IMPROVEMENT OF THE PROPERTIES OF Fe-Cr-Al ALLOYS BY THE ADDITION OF A SMALL AMOUNT OF RARE EARTH ELEMENTS

1981 ◽  
Vol 42 (C5) ◽  
pp. C5-469-C5-474
Author(s):  
Li Wern-bin ◽  
Yang Guo-ping ◽  
Li Cheng-hsiu ◽  
Liu Zheng-qun
Keyword(s):  
Rare Earth ◽  
Internal Friction ◽  
Rare Earth Elements ◽  
Al Alloys ◽  
Friction Study

A Study of the Average Flow in Open Channel with Baffle Blocks Distributed Uniformly

10.29007/zx1w ◽  
2018 ◽  
Author(s):  
Dung Tien Tran ◽  
Anh Tuan Le ◽  
Hong Nhung Le ◽  
Viet Hung Ho
Keyword(s):  
Water Level ◽  
Water Depth ◽  
Open Channel ◽  
Block Size ◽  
Average Flow ◽  
Modelling Studies ◽  
Baffle Block

A study of average flow in open channel with baffle blocks distributed uniformly has been considered by using channel with varied slopes. In this article, experimental and modelling studies were introduced when the correlation between the water depth and baffle block size is significant. The objective of the work is to give the rudimentary relations between discharge and water level in the channels. When the water depth is large, the effect of bottom channel friction on the flow is relatively small. This paper also gives applications of the software ‘Telemac-2D’ to simulate the flow under different conditions.

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