scholarly journals Electron microscopy of metastable phases in rapidly solidified Al-Co alloys

1994 ◽  
Vol 17 (2) ◽  
pp. 121-139 ◽  
Author(s):  
C Suryanarayana ◽  
Jyothi Menon
Keyword(s):  
Electron Microscopy ◽  
Metastable Phases ◽  
Rapidly Solidified ◽  
Co Alloys

Metastable Phases in Rapidly Solidified Aluminum-Rich Al-Fe Alloys

1982 ◽  
Vol 19 ◽  
Author(s):  
D. Shechtman ◽  
L.J. Swartzendruber
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Melt Spinning ◽  
Gamma Ray ◽  
Resonance Spectrum ◽  
Metastable Phase ◽  
Metastable Phases ◽  
Transmission Electron ◽  
Fe Alloys ◽  
Rapidly Solidified

ABSTRACTAluminum-rich Al-Fe binary alloys up to and including Al3Fe were prepared by melt spinning in order to study the metastable phase structure and its transformation following heat treatment. Transmission electron microscopy and nuclear gamma-ray resonance were utilized in the study. The rapidly solidified structure was found to contain up to three metastable phases. One of the phases, with a composition and a gamma-ray resonance spectrum appropriate for Al6Fe, has either a globular or a cellular morphology upon quenching.

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.

Devitrification products of rapidly solidified Ni-Nb amorphous alloys.

1990 ◽  
Vol 48 (4) ◽  
pp. 950-951
Author(s):  
G. A. Bertero ◽  
W.H. Hofmeister ◽  
N.D. Evans ◽  
J.E. Wittig ◽  
R.J. Bayuzick
Keyword(s):  
Electron Microscopy ◽  
Amorphous Structure ◽  
Sulphuric Acid Solution ◽  
X Ray Diffraction ◽  
High Fracture ◽  
Transmission Electron ◽  
Xrd Techniques ◽  
Rapidly Solidified ◽  
Electromagnetically Levitated

Rapid solidification of Ni-Nb alloys promotes the formation of amorphous structure. Preliminary results indicate promising elastic properties and high fracture strength for the metallic glass. Knowledge of the thermal stability of the amorphus alloy and the changes in properties with temperature is therefore of prime importance. In this work rapidly solidified Ni-Nb alloys were analyzed with transmission electron microscopy (TEM) during in-situ heating experiments and after isothermal annealing of bulk samples. Differential thermal analysis (DTA), scanning electron microscopy (SEM) and x-ray diffraction (XRD) techniques were also used to characterize both the solidification and devitrification sequences.Samples of Ni-44 at.% Nb were electromagnetically levitated, melted, and rapidly solidified by splatquenching between two copper chill plates. The resulting samples were 100 to 200 μm thick discs of 2 to 3 cm diameter. TEM specimens were either ion-milled or alternatively electropolished in a methanol-10% sulphuric acid solution at 20 V and −40°C.

scholarly journals Highly coercive rapidly solidified Sm–Co alloys

2006 ◽  
Vol 99 (8) ◽  
pp. 08B521 ◽  
Author(s):  
S. Aich ◽  
V. K. Ravindran ◽  
J. E. Shield
Keyword(s):  
Rapidly Solidified ◽  
Co Alloys

Undercooling and demixing in rapidly solidified Cu–Co alloys

2007 ◽  
Vol 449-451 ◽  
pp. 7-11 ◽  
Author(s):  
L. Battezzati ◽  
S. Curiotto ◽  
E. Johnson ◽  
N.H. Pryds
Keyword(s):  
Rapidly Solidified ◽  
Co Alloys

B22-O-10Transmission electron microscopy characterization of the microstructures in a rapidly solidified Mg-Sn alloy

Microscopy ◽  
2015 ◽  
Vol 64 (suppl 1) ◽  
pp. i51.2-i51
Author(s):  
Yurong Ma ◽  
Li Ye ◽  
Dongshan Zhao ◽  
Jianbo Wang
Keyword(s):  
Electron Microscopy ◽  
Microscopy Characterization ◽  
Rapidly Solidified

Formation of metastable phases in rapidly solidified Mg32(AlxZn1−x)49 alloys

1994 ◽  
Vol 31 (5) ◽  
pp. 583-588 ◽  
Author(s):  
R. Banerjee ◽  
R.T. Savalia ◽  
N. Prabhu ◽  
D. Prakash ◽  
U.D. Kulkarni ◽  
...  
Keyword(s):  
Metastable Phases ◽  
Rapidly Solidified
Sign in / Sign up

Export Citation Format

Share Document