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The theory of transformations in metals and alloys
J.W. Christian,H. M. Otte +1 more
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TLDR
In this paper, the authors present a general introduction to the theory of transformation kinetics of real metals, including the formation and evolution of martensitic transformations, as well as a theory of dislocations.Abstract:
Part I General introduction. Formal geometry of crystal lattices. The theory of reaction rates. The thermodynamics of irreversable processes. The structure of real metals. Solids solutions. The theory of dislocations. Polycrystalline aggregates. Diffusion in the solid state. The classical theory of nucleation. Theory of thermally activated growth. Formal theory of transformation kinetics. Part II Growth from the vapour phase. Solidification and melting. Polymorphic Changes. Precipitation from supersaturated solid solution. Eutectoidal transformations. Order-disorder transformations. Recovery recrystalisation and grain growth. Deformation twinning. Characteristics of martensic transformations. Crystallography of martensitic transformations. Kinetics of martensitic transformations. Rapid solidification. Bainite steels. Shape memory alloys.read more
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Phase selection in electrohydrodynamic atomization of alumina
TL;DR: In this paper, the phase selection of Al2O3 powders is examined on the basis of fundamental thermodynamic and kinetic considerations and results from computer models predicting the thermal history of the powders.
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Softening Kinetics in the Subcritical Heat-Affected Zone of Dual-Phase Steel Welds
TL;DR: In this paper, the Avrami equation was used to compare the relative heat needed to soften a dual-phase (DP) steel with respect to its parent material, and it was found that the heat input required for HAZ softening decreased as the C content of the martensite within the DP structure increased.
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Silicide precipitation and silicon crystallization in nickel implanted amorphous silicon thin films
TL;DR: In this paper, the nucleation and growth kinetics of NiSi2 precipitation in amorphous silicon thin films ion implanted with nickel were investigated using scanning transmission electron microscopy, and it was shown that the growth rate could be approximately described by a delta function at time t = 0 when the films were annealed between 325 and 400 °C.
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Dopant activation and surface morphology of ion implanted 4H- and 6H-silicon carbide
TL;DR: In this article, the activation of ion-implanted B into 4H-SiC, and B, and Al into 6H -SiC was investigated by annealing at 1750°C for 40 min in an Ar environment.
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Mechanism of martensite aging effects and new aspects
Kazuhiro Otsuka,Xiaobing Ren +1 more
TL;DR: In this article, a general principle called symmetry-conforming short-range order (SC-SRO) was proposed, which states that there exists interaction between crystal symmetry and distribution of point defects such that the SRO tries to follow the crystal symmetry, if in equilibrium.