scholarly journals Relation between the Allotropic Transformation of Cobalt and Some Additional Elements

1937 ◽  
Vol 1 (5) ◽  
pp. 177-190 ◽  
Author(s):  
Uichi Haschimoto
Keyword(s):  
Allotropic Transformation

Generation of 4H and 6H Structures During the Hexagonal-Rhombohedral Transformation in Dy2Co17

1975 ◽  
Vol 33 ◽  
pp. 38-39
Author(s):  
C. W. Allen ◽  
D. L. Kuruzar
Keyword(s):  
Elevated Temperatures ◽  
Layer Structure ◽  
Transition Element ◽  
Temperature Structure ◽  
Allotropic Transformation ◽  
Layer Plane ◽  
Planar Defects ◽  
Topologically Close Packed ◽  
Transformation Mechanisms ◽  
Shear Transformation

The rare earth/transition element intermetallics R2T17 are essentially topologically close packed phases for which layer structure models have already been presented. Many of these compounds are known to undergo allotropic transformation of the type at elevated temperatures. It is not unexpected that shear transformation mechanisms are involved in view of the layering character of the structures. The transformations are evidently quite sluggish, illustrated in furnace cooled Dy2Co17 by the fact that only rarely has the low temperature rhombohedral form been seen. The more usual structures observed so far in furnace cooled alloys include 4H and 6H in Dy2Co17 (Figs. 1 and 2) . In any event it is quite clear that the general microstructure is very complicated as a consequence of the allotropy, illustrated in Fig. 3. Numerous planar defects in the layer plane orientation are evident as are non-layer plane defects inherited from a high temperature structure.

scholarly journals In Situ Synchrotron X-ray Analysis: Application of High-Pressure Sliding Process to Ti Allotropic Transformation

2020 ◽  
Author(s):  
Zenji Horita ◽  
Daisuke Maruno ◽  
Yukimasa Ikeda ◽  
Takahiro Masuda ◽  
Yongpeng Tang ◽  
...  
Keyword(s):  
High Pressure ◽  
Allotropic Transformation ◽  
X Ray ◽  
Analysis Application

Allotropic transformation instigated thermal diffusivity of soot nanofluid: Thermal lens study

2019 ◽  
Vol 31 (11) ◽  
pp. 117106 ◽  
Author(s):  
M. S. Swapna ◽  
Vimal Raj ◽  
S. Sankararaman
Keyword(s):  
Thermal Diffusivity ◽  
Thermal Lens ◽  
Allotropic Transformation

Allotropic transformation induced stacking faults and discontinuous coarsening in a γ-γ′ Co-base alloy

2015 ◽  
Vol 59 ◽  
pp. 95-101 ◽  
Author(s):  
Ayan Bhowmik ◽  
Steffen Neumeier ◽  
Sneha Rhode ◽  
Howard J. Stone
Keyword(s):  
Base Alloy ◽  
Stacking Faults ◽  
Allotropic Transformation ◽  
Discontinuous Coarsening

Simulation of Phase Transformations Driven by Short Range Diffusion by Cellular Automaton

2010 ◽  
Vol 659 ◽  
pp. 405-410 ◽  
Author(s):  
Szilvia Gyöngyösi ◽  
Anita Tóth ◽  
Péter Barkóczy
Keyword(s):  
Phase Transformation ◽  
Cellular Automata ◽  
Cellular Automaton ◽  
Phase Transformations ◽  
Short Range ◽  
Energy State ◽  
Allotropic Transformation ◽  
Phase Boundaries ◽  
Grain Coarsening ◽  
Transformation Processes

The same property of the phase transformations driven by short range diffusion (recrystallization, allotropic transformation, grain coarsening) is that the movements of the grain or the phase boundaries take place by atomic jumps through the boundaries. The probability (frequency) of these jumps depends on only on the energy state of the closenear neighborhood of the atoms. In the operation of cellular automata Consequently, only the closenear neighborhood of the cells is taken into account in the operation of the cellular automaton. This similarity makes applicable the cellular automaton applicable to simulate the aforementioned phase transformation processes. A condition (rule) of the movement of grain and phase boundaries is introduced, which makes it possible to simulate all the all mentioned phase transformation by the same automatona.

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