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isothermal solidification

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Published: 01 December 2008
Fig. 12 Time-temperature transformation diagrams for isothermal solidification of eutectic cast iron. (a) Flake graphite cast iron. (b) Spheroidal graphite cast iron. L, liquid; A, austenite; C, cementite; Gr, graphite. Source: Ref 8 More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005213
EISBN: 978-1-62708-187-0
...-spheroidal graphite eutectic, and austenite-iron carbide eutectic. The article provides a discussion on primary austenite and primary graphite. It also describes the growth of eutectic in cast iron in terms of isothermal solidification, directional solidification, and multidirectional solidification...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005228
EISBN: 978-1-62708-187-0
... discusses various microgravity solidification experiments that involve pure metals, alloys, and semiconductors and presents the official NASA acronyms for them. MEPHISTO, TEMPUS, the isothermal dendritic growth experiment, and advanced gradient heating facility, are also discussed. crystal growth...
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006226
EISBN: 978-1-62708-163-4
... solidification Similar to the eutectic GROUP of invariant transformations is a group of peritectic reactions, in which a liquid and solid phase decomposes into a new solid phase on cooling through the peritectic isotherm. The generalized form of this peritectic reaction is: L + α + β...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005216
EISBN: 978-1-62708-187-0
... fraction, k is the partition coefficient, u n is the liquid flow velocity in the direction normal to the isotherms, v T is the isotherm velocity, and: (Eq 2) β = ρ S − ρ L ρ S is the solidification shrinkage, where ρ S and ρ L are the densities of the solid...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003723
EISBN: 978-1-62708-177-1
... the use of equilibrium binary phase diagrams as a tool in the interpretation of microstructures. It reviews an account of the two types of solid-state phase transformations: isothermal and athermal. The article discusses isothermal transformation and continuous cooling transformation diagrams which...
Image
Published: 01 December 2008
Fig. 14 Grain diameter (mean linear intercept) for commercially pure aluminum inoculated with A1-5Ti-lB at various levels. The grain diameters measured in TP-1 tests (diamonds) are compared with free-growth model predictions based on an isothermal melt (circles) or on directional More
Image
Published: 01 November 2010
Fig. 1 Stochastic simulation of equiaxed eutectic solidification applied to a gray cast iron ingot. A constant heat flux is applied on the left border of the 0.03 by 0.11 m domain, while the other borders are assumed to be perfectly insulated. The cooling rate decreases globally More
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: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005522
EISBN: 978-1-62708-197-9
... and isothermal solidification experiments will be performed in the Materials Science Laboratory (MSL) using dedicated furnace inserts, with the possibility of applying stimuli such as a rotating magnetic field to force fluid flow under microgravity conditions. The electromagnetic levitator (EML) will enable...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003734
EISBN: 978-1-62708-177-1
... monotectoid transformation pearlite peritectic reaction peritectoid transformation steel INVARIANT TRANSFORMATIONS are isothermal reversible reactions that occur at an invariant point on the phase diagram of an alloy, where the initial (parent) phase may be either a liquid or a crystalline solid...
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006227
EISBN: 978-1-62708-163-4
... Abstract Monotectic alloys can be classified based on the difference between the critical temperature and the monotectic temperature. This article begins with a schematic illustration of monotectic reaction in copper-lead system. It discusses the solidification structures of monotectics...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005214
EISBN: 978-1-62708-187-0
... Abstract This article describes the three solidification mechanisms of peritectic structures, namely, peritectic reaction, peritectic transformation, and direct precipitation. It discusses the theoretical analysis, which shows that the rate of the peritectic transformation is influenced...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005223
EISBN: 978-1-62708-187-0
... tearing. Fluidity Fluidity is usually defined as the maximum fluidity length, which is the distance a melt will flow in a standard mold with a constant cross section before the flow is terminated by solidification. It should be noted that this is different from a physicist's definition of fluidity...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006314
EISBN: 978-1-62708-179-5
... Abstract The microstructure that develops during the solidification stage of cast iron largely influences the subsequent solid-state transformations and mechanical properties of the cast components. This article provides a brief introduction of methods that can be used for simulating...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006300
EISBN: 978-1-62708-179-5
..., which is also the lower limit of the austenite field, is denoted T α 0 , while the lower limit of the three-phase field is denoted T α . Fig. 1 (a) Isopleth Fe-C section at 3 mass% Si of the stable Fe-C-Si diagram. (b) Isothermal section at 810 °C (1490 °F) showing the various fields...
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
... corresponds to the eutectic temperature isotherm. Source: Ref 43 Structures of Equiaxed Dendritic Grains The average grain size resulting from equiaxed dendritic solidification can also be described with indirect approaches that are similar to those used for eutectic solidification. As compared...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004001
EISBN: 978-1-62708-185-6
... of the gamma aluminides with particular reference to production scaleable techniques, including vacuum arc and cold-hearth melting, isothermal forging, conventional hot forging, and extrusion. The selection and design of manufacturing methods, in the context of processing-cost trade-offs for gamma titanium...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005402
EISBN: 978-1-62708-196-2
... in this article are at 1 bar unless noted otherwise. The most familiar phase diagram of a binary is the temperature-composition diagram, and that of a ternary is an isothermal section displaying the compositions of phases in equilibrium with each other using a Gibbs triangular paper, that is, an equal-angle...
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...