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microsegregation

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Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005215
EISBN: 978-1-62708-187-0
... that control microsegregation are discussed in relation to the manifestations of microsegregation in simple and then increasingly complex alloy systems. The measurement and kinetics of microsegregation are discussed for the binary isomorphous systems: titanium-molybdenum; binary eutectic systems: aluminum...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005237
EISBN: 978-1-62708-187-0
... Abstract In order to model macrosegregation, one must consider convection and the partitioning of segregating elements at the dendritic length scale. This article describes microsegregation with diffusion in the solid. It presents a continuum model of macrosegregation and illustrates...
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Published: 30 September 2014
Fig. 122 Dendritic microsegregation in a fractured gear tooth. 2×. Source: Ref 43 More
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Published: 01 December 2004
Fig. 14 Examples of microstructure with alloy microsegregation from coring. (a) Heavily banded medium-carbon steel microstructure that was produced by a continuous casting process with alternating layers of ferrite (light) and pearlite (dark). The initial as-cast structure was heavily cored More
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Published: 01 December 2004
Fig. 31 Model of microsegregation occurring in the arm of a growing dendrite. C E , eutectic composition; C SM , maximum solubility in solid; f s , solid fraction; f E , amount of eutectic critical; C 0 , initial composition of the alloy (bulk composition) at the beginning More
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Published: 31 August 2017
Fig. 22 Model of microsegregation occurring in the arm of a growing dendrite. C E , eutectic composition; C SM , maximum solubility in solid; f s, solid fraction; f E , amount of eutectic critical; C o , initial composition of the alloy (bulk composition) at the beginning More
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Published: 31 August 2017
Fig. 14 Microsegregation profiles of various elements in ductile iron castings. Source: Ref 53 More
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Published: 31 October 2011
Fig. 28 Example of microsegregation in a weld of a niobium-bearing nickel-base superalloy. (a) Micrograph showing position of composition trace. (b) Corresponding electron probe microanalysis results showing niobium microsegregation. Source: Ref 33 , 42 More
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Published: 01 January 2005
Fig. 3 Polarized light optical micrographs of microsegregation in (a) cast plus hot isostatically pressed Ti-47.3Al-2.0Nb-1.7Mn and (b) cast plus hot isostatically pressed plus isothermally forged Ti-48Al-2.5Nb-0.3Ta. Source: Ref 44 , 47 More
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Published: 01 January 2002
Fig. 85 Dendritic microsegregation in a fractured gear tooth. 2×. Source: Ref 30 More
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Published: 01 December 2008
Fig. 1 Optical micrographs of an aluminum alloy showing (a) microsegregation and (b) homo-genized structure. Source: Ref 1 . More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005229
EISBN: 978-1-62708-187-0
... during subsequent aging. The article provides a schematic illustration of an energy-dispersive X-ray spectroscope (EDS) scattered data of solute distributions across a dendrite due to microsegregation of chromium and molybdenum. It concludes with information on the computational modeling for simulation...
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
... Abstract Rapid solidification is a tool for modifying the microstructure of alloys that are obtained by ordinary casting. This article describes the fundamentals of the four microstructural changes, namely, microsegregation, identity of the primary phase, identity of the secondary phase...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006496
EISBN: 978-1-62708-207-5
... is on the chemical segregation that occurs during freezing, because it determines the castability of the alloy. The article describes the two types of segregation, namely, microsegregation and macrosegregation. It discusses the effect of freezing range on castability of an alloy. The article lists the freezing range...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005967
EISBN: 978-1-62708-166-5
.... The article illustrates the use of carbon restoration on decarburized spring steels. Different geometric models for carbide formation are shown schematically. The article also describes the different microstructural features such as grain size, microcracks, microsegregation, and banding. carbides...
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
... Abstract This article focuses on the concepts involved in heat-transfer modeling, thermomechanical modeling, and microsegregation modeling of hot tearing. It discusses the modeling of solidification defects, namely, inclusion entrapment, segregation, shrinkage cavities, gas porosity, mold-wall...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005437
EISBN: 978-1-62708-196-2
... problems that illustrate how the hierarchy of time and length scales associated with transport leads to the important features of cast microstructures. It includes equations for estimating microsegregation in cast alloys. solidification microstructure microsegregation cast alloys homogenization...
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
... Abstract The most common aluminum alloy systems are aluminum-silicon, aluminum-copper, and aluminum-magnesium. This article focuses on the grain structure, eutectic microstructure, and dendritic microstructure of these systems. It provides information on microsegregation and its problems...
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Published: 01 December 2004
Fig. 32 Microstructures of silver-copper alloys electron beam melted and resolidified at different velocities. (a) Ag-15Cu alloy resolidified at 0.025 m/s (1 in./s). Globular microsegregation pattern. Magnification: 32,000×. (b) Ag-15Cu alloy resolidified at 0.3 m/s (12 in./s). Cellular More
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Published: 30 September 2014
Fig. 121 Microcracking in a nickel-chromium steel that also exhibits microsegregation. 900×. Source: Ref 43 More