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supercooling

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Published: 09 June 2014
Fig. 21 Supercooling of cast iron with lamellar graphite in (a) a noninoculated state and (b) an inoculated state. Source: Ref 26 More
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Published: 01 December 2008
Fig. 12 Constitutional supercooling in alloy solidification. Source: Ref 5 More
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Published: 31 August 2017
Fig. 6 Supercooling of cast iron with lamellar graphite in (a) a noninoculated state and (b) an inoculated state More
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005609
EISBN: 978-1-62708-174-0
... Abstract This article reviews the fundamental solidification concepts for understanding microstructural evolution in fusion welds. The common concepts, namely, nucleation, competitive grain growth, constitutional supercooling, solute redistribution, and rapid solidification, depend...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001338
EISBN: 978-1-62708-173-3
... a comparison of casting and welding solidification. The constitutional supercooling model for describing weld solidification is presented because it qualitatively describes the evolution of different weld microstructures. The article describes the welding rate effect on weld pool shape and microstructure...
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Published: 01 December 2008
Fig. 10 Formation of equiaxed crystals ahead of the columnar front, and the length of the constitutionally supercooled liquid ahead of the columnar front More
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Published: 01 January 1993
Fig. 6 Liquidus profile of a solid-liquid interface. (a) Liquidus profile for steady-state constitutional supercooling. (b) Three liquidus temperature gradients (curves A, B, and C) compared to the liquidus profile. Source: Ref 6 More
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Published: 01 January 1993
dendrite. (f) Five temperature gradients versus constitutional supercooling. Source: Ref 6 More
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Published: 01 November 2010
Fig. 53 Finite-element analysis model prediction of residual stresses for a generic turbine disk made from U720LI heat treated with (a) the supercooler method, resulting in a maximum and minimum residual stress of 551 and −473 MPa, respectively, and (b) the oil quenching method, resulting More
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
... by constitutional undercooling and interface energy. Since the thermal and solute gradients in the liquid are negative, constitutional supercooling will always be present to cause the interface to become unstable. The interface energy will initially stabilize the spherical nucleus, but the effect of interface...
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
... nucleants, so that the majority of the drops can display a large undercooling. Based on experience with droplet emulsion samples ( Ref 3 ), supercooling effects become measurable for size refinement below approximately 100 μm diameter and can become appreciable for powder sizes less than approximately 10 μm...
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
... from melts solidified at extreme values of thermal supercooling (hundreds of degrees Kelvin). Particle Engulfment and Pushing by Solidifying Interfaces The behavior of solid-melt interfaces upon encountering inert particulates is an important issue in casting technology. A microgravity...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005348
EISBN: 978-1-62708-187-0
... ceramic shell; constitutional supercooling FRM ber-reinforced metals A area CSP constitutional supercooling parameter ft foot A angstrom CST constitutional solution treatment g gram; gas ac alternating current CV check valve casting g acceleration due to gravity AC air cool CVD chemical vapor deposition...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005295
EISBN: 978-1-62708-187-0
... supercooling, as depicted in Fig. 12 . Segregates ahead of the advancing interface in the region of high thermal gradient keep the liquid steel supercooled, which promotes the columnar growth. As the thermal gradient decreases as solidification progresses, this driving force disappears, and the structures...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003840
EISBN: 978-1-62708-183-2
... in purity between water in the pores and pure water, thermal shock, and supercooling because of deicing salts. The article “Environmental Performance of Concrete” discusses the properties of concrete, their desirable properties, the causes of concrete degradation, and how these degradation issues can...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005217
EISBN: 978-1-62708-187-0
... the liquidus, as seen in Fig. 2 . In the early stages of crystal formation, the growing crystals are small (as is heat development) and therefore have no effect on the bulk liquid temperature. The growth rate is also low because of the low supercooling close to the liquidus temperature. The supercooling...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003255
EISBN: 978-1-62708-176-4
... pass through the freezing range without crystallizing so that it becomes a supercooled liquid, which transforms to glass at lower temperatures. The critical cooling rate required for glass formation in common inorganic glass is very low (≤10 −1 K/s), which means that it is very easy to form inorganic...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005903
EISBN: 978-1-62708-167-2
... by the temperature T Emin and T Emax . The eutectic equilibrium temperature (TG—not entered in Fig. 21 ) lies slightly above or below T Emax . Fig. 20 Cooling curve of hypoeutectic cast iron with lamellar graphite. Source: Ref 25 Fig. 21 Supercooling of cast iron with lamellar graphite...
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
... and by the subsequent growth that proceeds from these sites. If nucleation occurs in the bulk of the melt, then it must have been supercooled (that is, at a temperature below its melting point); therefore, the initial growth is likely to be dendritic. The dendrites from one nucleus grow out until they impinge upon...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005669
EISBN: 978-1-62708-198-6
... nucleation rates resulting in finer grain size. For solid nuclei to form, a melt must be cooled to below he equilibrium solid-liquid transformation temperature (i.e., undercooled/supercooled). This is due to the need to overcome the latent heat released during solidification and the increase in surface...