Solidification microstructures and calculated mixing enthalpies in CoCrCu containing alloys

2018 ◽  
Vol 15 ◽  
pp. 1-10 ◽  
Author(s):  
Nicholas Derimow ◽  
Reza Abbaschian
Keyword(s):  
Solidification Microstructures ◽  
Mixing Enthalpies

Phases, Morphologies, Segregations – Solidification Microstructures and their Characterization

2014 ◽  
Vol 51 (12) ◽  
pp. 849-859
Author(s):  
M. Rettenmayr ◽  
A. Löffler ◽  
H. Engelhardt ◽  
D.M. Liu
Keyword(s):  
Solidification Microstructures

THE SOLIDIFICATION MICROSTRUCTURE OF BIOMEDICAL TITANIUM ALLOYS UNDER THE CENTRIFUGAL FORCE

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4685-4690
Author(s):  
ZIYONG CHEN ◽  
LIJUAN XU ◽  
ZHIGUANG LIU ◽  
YUYONG CHEN
Keyword(s):  
Centrifugal Force ◽  
Graphite Crucible ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Crystal Boundary ◽  
X Ray ◽  
Solidification Defects ◽  
Solidification Microstructures ◽  
Centrifugal Equipment ◽  
Graphite Mould

Two biomedical alloys, Ti -39 Nb -5.1 Ta -7.1 Zr ( TNTZ1 ) and Ti -35.3 Nb -5.1 Ta -7.1 Zr ( TNTZ2 ) were melted using LZ5 type centrifugal equipment for casting titanium. The solidification microstructures of TNTZ1 and TNTZ2 alloys cast in graphite crucible without centrifugal force are mostly big arborescent crystal with dispersed porosity in it. After pouring into a graphite mould under centrifugal force, the lower part of ingot showed mostly arborescent crystals with few equiaxed crystals, while the upper part of ingot is basically spherical equiaxed crystals. The solidification defects, such as dispersed pores were very difficult to find. Nb is supposed to refine the arborescent crystals. X-ray diffraction (XRD) analysis showed Ti -phase and Nb -phase existing in the above two alloys. The content of Ti was found relatively low in crystal interior and relatively high in crystal boundary. The content of Nb/Zr was uniform in whole microstructure.

Banded solidification microstructures

1996 ◽  
Vol 27 (3) ◽  
pp. 625-634 ◽  
Author(s):  
W. Kurz ◽  
R. Trivedi
Keyword(s):  
Solidification Microstructures

scholarly journals Calculated mixing enthalpies of 11 IIB-IVB and IIB-VB binary alloy systems using a subregular model

2010 ◽  
Vol 46 (2) ◽  
pp. 141-151 ◽  
Author(s):  
Z. Bangwei ◽  
S. Xiaolin ◽  
L. Shuzhi ◽  
Y. Xiaojian ◽  
X. Haowen
Keyword(s):  
Binary Alloy ◽  
First Principles ◽  
Theoretical Calculations ◽  
Points Of View ◽  
Group B ◽  
Miedema Theory ◽  
First Time ◽  
Subregular Model ◽  
Mixing Enthalpies ◽  
Alloy Systems

There have been no theoretical calculations of the mixing enthalpies for group B metal alloy systems using the famous Miedema theory or from first principles. Therefore such systematic calculations for the 11 group IIB?IVB and IIB?VB binary alloy systems are performed for the first time using a subregular model. The results show that the agreement between the calculations and experimental data is pretty good and could be accepted from the theoretical or experimental points of view. It can be concluded from the results that the subregular model can be used for calculating the mixing enthalpies of the group B alloy systems, at least for the IIB?IVB and IIB?VB alloy systems.

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