Results 261 to 270 of about 116,969 (285)

Effect of a weak transverse magnetic field on solidification structure during directional solidification

Acta Materialia, 2014
Abstract Six alloys were directionally solidified at low growth speeds (1–5 μm s −1 ) under a weak transverse magnetic field (⩽0.5 T). The results show that the application of a weak transverse magnetic field significantly modified the solidification structure.
Li, Xiaojian, Fautrelle, Y., Gagnoud, A., Du, D., Wang, J., Ren, Zhuoxiang, Nguyen-Thi, H., Mangelinck-Noel, N.   +7 more
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Dynamical structures in Directional Solidification of Mixtures

Physica Scripta, 1987
Solidification patterns in mixtures are discussed and it is shown that, although the understanding of the factors affecting dendritic growth is improving, more experiments on cellular patterns are needed. The use of transparent eutectic materials is emphasized and the need for more theoretical work on atomic attachment kinetics is stressed.
B Caroli, C Caroli, B Roulet
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Directional solidification fronts: Structure and dynamics

Physica D: Nonlinear Phenomena, 1984
Abstract The equations of motion for a two-dimensional solidification front are established. Beyond a threshold velocity the front develops spatial structure. The resulting patterns are displayed and compared with experiment. When noise is added to the equations, pattern selection effects are observed which can be explained phenomenologically.
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Solidification structure control by magnetic fields

2002
This chapter reviews the application of magnetic fields to solidification processing and considers the conditions necessary to control solidification structures. Application of magnetic fields during solidification and crystal growth processing has been used practically for continuous casting and the Czochralski process.
Itsuo Ohnaka, Hideyuki Yasuda
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Solidification structures of Ti–Al–Cr alloys

Intermetallics, 1999
Abstract Phase transformations in the ternary Ti–Al–Cr alloy system have been studied by combining preliminary phase equilibria calculations and microstructural studies of a number of model alloys. The results have contributed to a better understanding of phase equilibria in the Ti–Al–Cr alloy system above 1273 K. A liquid surface projection has been
G Shao, P Tsakiropoulos
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Structural Transformation of Aluminum Nanowires during Solidification

Advanced Materials Research, 2010
The computer simulation of the structural evolutions of Al nanowires on cooling has been carried out based on the embedded atom method potential. The infinite Al nanowire was modeled by super-cell with a one-dimensionally periodical boundary condition along the [001] direction.
Guo Rong Zhou, Zhong Quan Guo, Xin Ying Teng   +2 more
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Solidification Structures of Pure Metals

2004
Abstract Pure metals normally solidify into polycrystalline masses, but it is relatively easy to produce single crystals by directional solidification from the melt. This article illustrates the dislocations present in a metal crystal, which is often polygonized into sub-boundaries during grain growth after solidification.
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Solidification Structures and Properties of Fusion Welds

International Metallurgical Reviews, 1975
To an increasing extent the wide range of fundamental knowledge of solidification processes is being applied to the study of fusion-weld solidification. Initially this fundamental knowledge is surveyed concisely and those areas of particular importance to weld-pool solidification are indentified.
G. J. Davies, J. G. Garland
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The formation of solidification structures

2004
Metals and alloys are almost always processed in the liquid state at some stage during their manufacture. Subsequent solidification leads to characteristic microstructures, whose examination enables identification of the mechanisms involved The effects may sometimes persist even after lengthy hot and cold working sequences, so that it is important to ...
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Directional Solidification and Composite Structures

1968
Directionally solidified alloys possess any of several different types of structures depending on alloy and solidification conditions. The structures obtained include equiaxed dendrites, columnar dendrites, fibrous dendrites, cells, single crystals, and eutectic-like composite crystals.
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