Acta Metallurgica
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#1F. C. Larche (University of Montpellier)H-Index: 5
#2John W. Cahn (NIST: National Institute of Standards and Technology)H-Index: 75
The thermodynamics of stressed crystals that can change phase and composition is examined with particular attention to hypotheses used and approximations made. Bulk and surface conditions are obtained and for each of them practical expressions are given in terms of experimentally measurable quantities. The concept of open-system elastic constants leads to the reformulation of internal elastochemical equilibrium problems into purely elastic problems, whose solutions are then used to compute the c...
343 CitationsSource
#1Perry H. Leo (UMN: University of Minnesota)H-Index: 24
#2R. F. Sekerka (CMU: Carnegie Mellon University)H-Index: 6
The effect of surface stress on the equilibrium conditions at crystal-melt, coherent crystal-crystal and greased crystal-crystal interfaces is investigated by using a variational method to test for equilibrium. In all three cases, the interface between the phases is modelled as a Gibbsian dividing surface, and the excess internal energy associated with the interface is allowed to depend on both the deformation of the interface and the crystallographic normal to the interface. The position of an ...
74 CitationsSource
36 Citations
17 Citations
#1C. Marsh (UIUC: University of Illinois at Urbana–Champaign)H-Index: 3
#2Haydn Chen (UIUC: University of Illinois at Urbana–Champaign)H-Index: 49
Abstract The kinetic behavior of precipitation in a supersaturated Ni-12.5 at.% Si alloy single crystal has been studied by an in situ high-temperature X-ray diffraction method for the first time. Experimental and analytic techniques have been developed to simultaneously determine the interfacial free energy, γ, the solute diffusivity, D, and the equilibrium solubility, Ce, from a single type of X-ray measurement The principle of analysis entailed a diffusion-controlled coarsening model put fort...
27 CitationsSource
#1S.P. Gupta (IITK: Indian Institute of Technology Kanpur)H-Index: 4
#2R. Nakkalil (IITK: Indian Institute of Technology Kanpur)H-Index: 3
Abstract The morphology and growth kinetics of the cellular precipitate and products of two discontinuous coarsening reactions have been studied in the temperature range 710–1025 K. The NiIn alloy was observed to decompose completely by cellular precipitation reaction into a lamellar structure consisting of alternate lamellae of α and φ phases at all aging temperatures. The fine lamellar structure of the primary cells decomposed into a coarse lamellar structure in two stages. In the first stage...
11 CitationsSource
Le modele pour le calcul du vieillissement des alliages d'aluminium, que l'on a developpe dans la partie I, est applique a plusieurs traitements thermiques, ce qui permet d'aborder des problemes tels que la prevision de la perte de resistance mecanique dans la zone chauffee au voisinage des soudures. On considere en premier le rechauffage d'un materiau prealablement vieilli. On modelisa ensuite le traitement thermique a cycle thermique parabolique a l'aide d'un traitement isotherme equivalent, e...
14 Citations
#1J. LiuH-Index: 1
#2Y. ZhouH-Index: 1
Last. B. ShangH-Index: 1
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On etudie experimentalement la croissance en regime permanent d'un eutectique Al-Si sous contrainte
6 Citations
#1Z.G. LiuH-Index: 2
#2T. Al-KassabH-Index: 1
Last. P. HaasenH-Index: 1
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La structure atomique des interfaces entre une solution solide a base de nickel de structure CFC (phase α) et les precipites β (NiBe de structure B2) dans un alliage Ni-12 at.% Be est etudiee par microscopie a emission ionique de champ et par simulation d'images
1 Citations
#1P.V. EvansH-Index: 3
#2Genevieve DevaudH-Index: 10
Last. Yeon-Wook KimH-Index: 5
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Nous examinons la formation de phases amorphe et cristallisee dans ces spheres. L'analyse des resultats obtenus par diffraction electronique revele que les spheres les plus petites sont amorphes, avec un reseau desordonne covalent a coordination tetraedrique, et qu'ils ne constituent pas une structure polycristalline a grains tres fins ou une structure de liquide metallique a configuration gelee. On analyse la formation de phases semi-conductrices amorphes et cristallisees par la theorie de la g...
9 Citations
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