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eutectic solidification

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Published: 01 December 2016
Fig. 1.33 Model of the (αAl + Si) eutectic solidification in the cast part. (a) Growth of the zone of the eutectic columnar cells from wall to the center. Both main and local heat flows are opposite to the growth direction. Unmodified alloy. (b) Growth of the zone of the equiaxed eutectic More
Image
Published: 01 December 2008
Fig. 9.11 The driving force on diffusion during eutectic solidification Δ G eff . (a) The phase diagram for eutectic system. (b) The free energy diagram ( T = T 1 ). (c) The diffusion of component atoms More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.tm.t52320259
EISBN: 978-1-62708-357-7
... Abstract This chapter provides a classification of the types of microstructural changes and transformations and then reviews each type. It presents the Johnson-Mehl-Avrami-Kolmogorov (JMAK) equation and explains the thermodynamics of eutectic solidification and eutectoid transformation...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310331
EISBN: 978-1-62708-326-3
... Abstract Cast irons, like steels, are iron-carbon alloys but with higher carbon levels than steels to take advantage of eutectic solidification in the binary iron-carbon system. Like steel, heat treatment of cast iron includes stress relieving, annealing, normalizing, through hardening...
Image
Published: 01 December 2016
Fig. 1.41 Lamella → rod transition during directional solidification of eutectic. (a) Growth mechanism as affected by cooling rate, criterion-minimum undercooling Δ T . Source: Ref 70 . (b) Eutectic phase morphology as affected by growth rate, criterion-minimum Δ G . Source: Ref 63 More
Image
Published: 01 August 2018
Fig. 8.24 The solidification of an alloy with a hypo-eutectic composition X 0 begins with the formation of austenite in accordance with the schematic phase diagram. As austenite forms, the interdendritic liquid gets richer in carbon until the composition of the eutectic, X E , is reached More
Image
Published: 01 August 2018
Fig. 8.28 Schematic presentation of the evolution of solidification in a eutectic cast iron with spheroidal graphite. Initially (a) austenite dendrites and graphite particles can grow independently, from the liquid. (b) From about 30% volume fraction of solid phase, graphite particles begin More
Image
Published: 01 August 2018
Fig. 17.22 Schematic microstructural evolution of a gray cast iron during solidification superimposed on a thermal analysis curve. Some undercooling below the eutectic temperature is needed for nucleation to start. Eutectic solidification happens essentially at constant temperature More
Image
Published: 01 December 2008
Fig. 9.9 Optical microscopic images of the vertical and the cross section of the unidirectional eutectic solidification structure. (a) Phase diagrams. (b) Lamellar eutectic structure. (c) Rodlike eutectic structure. Courtesy of Y. Kawahara More
Image
Published: 01 October 2011
Fig. 10.4 Effect of alloying elements on the formation of either graphitic or white cast iron during eutectic solidification. Source: Ref 10.3 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060247
EISBN: 978-1-62708-261-7
... special cast iron white cast iron CAST IRONS, like steels, are iron-carbon alloys. The difference is that cast irons typically possess higher carbon levels than steels, so that cast irons can take advantage of eutectic solidification in the binary iron-carbon system ( Fig. 10.1 ). The term eutectic...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420087
EISBN: 978-1-62708-310-2
... Abstract This chapter begins by presenting a generic eutectic phase diagram and identifying critical points, lines, and features. It then describes the composition and properties of aluminum-silicon and lead-tin eutectic systems, the characteristics of eutectic morphologies, the solidification...
Image
Published: 01 June 2008
Fig. 6.13 Solidification structures of eutectics. Source: Ref 5 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220129
EISBN: 978-1-62708-259-4
.... It explains how steel shrinks as it solidifies, causing issues such as pipe and voids, and how differences in the solubility of solid and liquid steel lead to compositional heterogeneities or segregation. It describes the dendritic nature of solidification, peritectic and eutectic reactions, microporosity...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2016
DOI: 10.31399/asm.tb.ascaam.t59190001
EISBN: 978-1-62708-296-9
... castings and its effect on properties and processing characteristics. It discusses the faceted nature of primary Si crystals and the modification techniques used to optimize their shape. It also describes the morphology of the (alpha-Al + Si) eutectic, which can be lamellar or rodlike in shape...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220583
EISBN: 978-1-62708-259-4
... the eutectic composition and temperature and may alter the solidification sequence of the alloys. It is common to adopt formulas to calculate the carbon equivalent (CE) to forecast the solidification behavior of cast irons. A simple formula used to calculate the “carbon equivalent” is given as ( Ref 4 ): C...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320031
EISBN: 978-1-62708-332-4
.... Silicon influences the eutectic and eutectoid reactions, the solidification range, and the casting characteristics. 4.5.1 Effect of Silicon on the Iron-Iron Carbide Diagram Figure 4.4 is an overlay of the iron-iron carbide equilibrium diagram without consideration of the effect of silicon (shown...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140039
EISBN: 978-1-62708-335-5
... aluminum-silicon alloys. aluminum alloy castings dendrite arm spacing eutectic modification grain shape grain size intermetallic phases microstructure phase refinement Microstructural features are products of metal chemistry and solidification conditions. The microstructural features...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 January 2024
DOI: 10.31399/asm.tb.pdktmse.t56100001
EISBN: 978-1-62708-470-3
... binary phase diagrams that account for the presence of inclusions, oxygen content, and secondary phases. binary phase diagrams CALPHAD composition differential scanning calorimetry eutectic point lever rule liquidus temperature phase reactions solidification microstructure solidus...
Image
Published: 01 March 2012
Fig. 5.23 Coupled zones (shaded regions) on eutectic phase diagrams. The coupled zones represent the interface temperature (solidification rate) dependent composition region in which a completely eutectic structure is obtained. (a) Nearly symmetrical coupled zone in regular eutectic. (b More