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D.J. Fisher

Bio: D.J. Fisher is an academic researcher from École Polytechnique Fédérale de Lausanne. The author has contributed to research in topics: Eutectic system & Directional solidification. The author has an hindex of 3, co-authored 3 publications receiving 1078 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, a general framework is proposed to relate tip radius, interface undercooling and primary arm spacing in alloy dendrite growth, and all the growth morphologies developed between the limiting morphology at low and at high velocity are described to a first approximation, using an ellipsoid of revolution.

899 citations

Journal ArticleDOI
TL;DR: In this paper, a first attempt is made to incorporate the various disparate facts concerning their growth into a coherent growth model in particular, the usual minimum undercooling criterion is abandoned in favour of one based on the morphological instability and branching of the phases Despite numerous approximations, the correct order of magnitude of spacing and under cooling is predicted, as is the effect of the imposed temperature gradient.

189 citations

Journal ArticleDOI
TL;DR: In this paper, a microstructural control of eutectic cast alloys is discussed, which is essential in obtaining the required properties in the cast state, such as good micro-structural properties of these alloys.
Abstract: Casting alloys of eutectic composition are of great practical importance. Good microstructural control of these alloys is essential in obtaining the required properties in the cast state. P...

97 citations


Cited by
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Journal ArticleDOI
J.D. Hunt1
TL;DR: In this article, an analysis for the growth of equiaxed grains ahead of the columnar front during directional solidification is presented, and the model considers both single-phase and eutectic growth.

1,062 citations

Book ChapterDOI
TL;DR: In this article, some of the fundamental factors which play important roles in determining microstructures under rapid solidification condition are described, and it is shown that the interface stability analysis needs to be extended to include the possibility of high thermal as well as high solute undercoolings.

901 citations

Journal ArticleDOI
TL;DR: In this article, a general framework is proposed to relate tip radius, interface undercooling and primary arm spacing in alloy dendrite growth, and all the growth morphologies developed between the limiting morphology at low and at high velocity are described to a first approximation, using an ellipsoid of revolution.

899 citations

Journal ArticleDOI
TL;DR: In recent years, major advances have taken place in our understanding of welding processes and welded materials because of the complexity of fusion welding processes, solution of many important contemporary problems in fusion welding requires an interdisciplinary approach as mentioned in this paper.
Abstract: In recent years, major advances have taken place in our understanding of welding processes and welded materials Because of the complexity of fusion welding processes, solution of many important contemporary problems in fusion welding requires an interdisciplinary approach Current problems and issues in fusion welding are reviewed Solution of these problems, apart from being a contribution to the advancement of science, is also necessary for science-based tailoring of composition, structure, and properties of the welded materials

454 citations

Journal ArticleDOI
TL;DR: In this article, a growth equation for free dendrites growing in a liquid alloy was developed by coupling their diffusion fields for a parabolic tip and by applying a stability criterion.

454 citations