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plane front solidification

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Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005209
EISBN: 978-1-62708-187-0
...Abstract Abstract One impressive example of plane front solidification (PFS) is the industrial production of large silicon single crystals, used mainly as substrates for integrated circuits. This article explores the PFS of a single phase, without taking convection into account. It discusses...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005210
EISBN: 978-1-62708-187-0
... and grows, latent heat and solute are rejected into the liquid so that negative temperature and concentration gradients are present in the liquid at the solid/liquid interface. As discussed by Kurz in the previous article, “Plane Front Solidification,” in this Volume, the stability of the interface at low...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005226
EISBN: 978-1-62708-187-0
..., the velocity needed for plane-front solidification increases. These silver-copper alloys have relatively small freezing ranges, and the velocities are low enough that it was not necessary to invoke nonequilibrium interface conditions in the theory. In order to obtain plane front for alloys with larger freezing...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005406
EISBN: 978-1-62708-196-2
.... It is recognized that such challenging coupling is not simple. References References 1. Trivedi R. and Sunseri E. , Non-Plane Front Solidification: Cellular and Dendritic Growth, and Columnar to Equiaxed Transition , Casting , Viswanathan S. , Ed., Vol 15 , ASM Handbook , ASM...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005236
EISBN: 978-1-62708-187-0
.... , Non-Plane Front Solidification: Cellular and Dendritic Growth, and Columnar to Equiaxed Transition , Casting , Viswanathan S. , Ed., Vol 15 , ASM Handbook , ASM International , 2008 2. Shankar S. , Eutectic Solidification , Casting , Viswanathan S. , Ed., Vol 15...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003784
EISBN: 978-1-62708-177-1
... will be established somewhere between the hot melt and the cold wall. The solidification of the casting will then proceed inward, with a more or less uniform isothermal front. The grains that nucleated on the mold wall will elongate in the direction of heat flow, as shown in Fig. 9 , resulting in a columnar grain...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003724
EISBN: 978-1-62708-177-1
... will be produced in the undercooled zone adjacent to the wall. Then, a thermal gradient from the melt to the mold will be established and solidification will proceed inward from the mold wall with an isothermal front. The grains will elongate in the direction of heat flow, resulting in a columnar polycrystalline...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005518
EISBN: 978-1-62708-197-9
... directions, tip kinetics, and dendritic morphology in the presence of fluid flow. Growth Directions The production of calculated images of dendritic structures has been one of the most spectacular applications of the direct simulation methods of solidification microstructures. The front-tracking ( Ref...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005202
EISBN: 978-1-62708-187-0
... is a function of the local solidification rate and the temperature gradient at the liquid-solid interface. To achieve a directed dendritic primary structure, a relatively high temperature gradient at the solidification front must be maintained during the entire remelting process. The growth direction...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006311
EISBN: 978-1-62708-179-5
... bulk nucleation. In the absence of bulk nucleation, the columnar front will continue to grow. Planar Interfaces Planar growth of alloys can usually be achieved only in crystal growth furnaces at high temperature gradients and low solidification velocities. For example, for planar solidification...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005277
EISBN: 978-1-62708-187-0
... such as the Cosworth process, where the mold is held in a rotatable fixture during casting.) The flow across such inclined planes is therefore progressive, if slow, but the continuous advance of the front at all points assists in the goal of keeping the meniscus “alive.” Rule 4: Bubble Damage No bubbles of air...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009016
EISBN: 978-1-62708-187-0
... at the mold wall and advances into the casting interior on a plane solidification front. Source: Adapted from Ref 11 Fig. 6 Diagram of mode of freezing in alloys having a short freezing range Fig. 7 Schematic of mode of freezing in alloys having a long freezing range Fig. 8...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005212
EISBN: 978-1-62708-187-0
.... Source: Ref 20 Theories of Solidification of the Aluminum-Silicon Eutectic The flakelike, interconnected silicon phase characteristic of typical unmodified aluminum-silicon eutectics is believed to grow by twinning via a mechanism known as twin plane re-entrant edge (TPRE). The TPRE mechanism...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005218
EISBN: 978-1-62708-187-0
...Abstract Abstract Metal transparency and interaction with X-rays have been recognized as obvious candidate principles from which methods for in situ monitoring of solidification processes could be developed. This article describes the use of X-ray imaging-based techniques to investigate...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003171
EISBN: 978-1-62708-199-3
...) mode for pure metals and alloys. (a) Freezing mode in pure metals, in which the freezing range (liquidus-to-solidus interval) approaches zero. Crystallization begins at the mold wall and advances into the casting interior on a plane solidification front. (b) Freezing mode in short freezing range alloys...
Book Chapter

Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006225
EISBN: 978-1-62708-163-4
.... The article describes the aluminum-silicon eutectic system and the lead-tin eutectic system. It discusses eutectic morphologies in terms of lamellar and fibrous eutectics, regular and irregular eutectics, and the interpretation of eutectic microstructures. The article examines the solidification of a binary...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005420
EISBN: 978-1-62708-196-2
... of clogging is a complex subject that has been reviewed elsewhere ( Ref 19 ). Capture Particle capture into the solidification front is a critical step during the modeling of inclusion transport. Small particles flow between the dendrites, so they can be modeled as entrapped when they touch a domain...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003681
EISBN: 978-1-62708-182-5
... as a solidification front. The unique characteristics of this solidification front are the high cooling rates (such as 10 7 K/s) and the steep temperature gradient (such as 10 5 K/cm). These characteristics promote the formation of metastable compositions and structures. Fig. 8 View of laser-melted surface...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005207
EISBN: 978-1-62708-187-0
..., and to account for the free energy changes involved in various crystallization processes. In most castings, a full global equilibrium associated with a uniform phase composition does not occur throughout the ingot. However, it is often valid to take the liquid and solid compositions at the solidification front...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003727
EISBN: 978-1-62708-177-1
... solidification surface defects ALUMINUM-BASE ALLOYS constitute a group of cast materials second only to ferrous castings in tonnage. Aluminum alloys have gained increasing markets in the automotive and aircraft industry. New alloys are still under development, since there are still wide possibilities...