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microsegregation

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Published: 01 September 2008
Fig. 26 Longitudinal cross section showing microsegregation. Original steel segment shown is approximately 2 cm wide. More
Image
Published: 01 December 1999
Fig. 5.16 Microcracking in a Ni-Cr steel that also exhibits microsegregation. 1000× More
Image
Published: 01 December 1999
Fig. 5.28 Dendritic microsegregation in a fractured gear tooth.2× More
Image
Published: 01 December 1999
Fig. 5.34(a) Flow of microsegregation caused by forging in a Ni-Mo steel part. Note the surface carburized layer. More
Image
Published: 01 December 1999
Fig. 5.34(b) Nonmetallic inclusions and banding in a heavily microsegregated 1% C alloy steel sample. Retained austenite, light More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140165
EISBN: 978-1-62708-264-8
... the relationship between cooling rate, grain size, grain shape, and phase structures. It explains how the transition from liquid to solid state creates the conditions under which microsegregation occurs, and how it impacts the distribution of alloying elements, carbides, and inclusions. The link between...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220129
EISBN: 978-1-62708-259-4
..., macro- and microsegregation, and hot cracking, as well as the effects of solidification and remelting on castings, ingots, and continuous cast products. It explains how to determine where defects originate in continuous casters and how to control alumina, sulfide, and nitride inclusions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770099
EISBN: 978-1-62708-337-9
... Abstract This chapter is a study of the microstructure of case-hardened steels. It explains what can be learned by examining grain size, microcracking, nonmetallic inclusions, and the effects of microsegregation. It identifies information-rich features, describing their ideal characteristics...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200295
EISBN: 978-1-62708-354-6
... to facilitate pouring and other foundry processes, or to take advantage of the fact that cast alloys do not undergo deformation processes. The metallurgical structure (phase distribution, alloy microsegregation) is different because of the solidification rates and the lack of deformation processing in castings...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930003
EISBN: 978-1-62708-359-1
... (few microns) is referred to as microsegregation, and large-scale segregation (hundreds of microns) is known as macrosegregation. Macrosegregation can occur in welds, but it is not very common. In welds, it is primarily due to a sudden change in the welding parameters and the resultant change...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820001
EISBN: 978-1-62708-339-3
... of autogenous welds and welds made with matching filler metal may be inferior to that of properly annealed base metal because of: Microsegregation Precipitation of secondary phases Formation of unmixed zones Recrystallization and grain growth in the weld heat-affected zone (HAZ) Volatilization...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930189
EISBN: 978-1-62708-359-1
... gradients on the scale of a few microns, referred to as microsegregation, exist within individual weld beads due to segregation of major and trace elements during solidification ( Ref 4 ). Forms of Weld Corrosion Weldments can experience all the classical forms of corrosion, but they are particularly...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
.... These characteristics are described for both alpha-beta (Ti-6Al-4V) and metastable beta alloys in this section. Also described are weld defects (macro-segregation, microsegregation, and solidification-defect formation) and the effects of postweld heat treatment on welded titanium structures. Alpha-Beta Alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420429
EISBN: 978-1-62708-310-2
... . Gravity Segregation Gravity segregation is another type of macrosegregation that occurs due to differences in density in the liquid melt. Denser constituents tend to sink toward the bottom, while lighter ones float toward the top. Microsegregation As the dendrite grows into the melt...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310201
EISBN: 978-1-62708-286-0
...). The possible precipitation of intermetallic phases in the HAZ can lower toughness and corrosion resistance. There is increased microsegregation in the fusion zone with increasing alloy content. There are thermodynamically metastable conditions due to the low diffusion rates in the face-centered cubic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140061
EISBN: 978-1-62708-335-5
... to phase and morphology changes associated with soluble elements and compounds, other (sometimes desirable) effects accompany elevated-temperature treatment. Microsegregation in all solidified structures is minimized or eliminated. Residual stresses caused by solidification or by prior quenching...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130087
EISBN: 978-1-62708-284-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820125
EISBN: 978-1-62708-339-3
... during high-purity water exposure in nuclear reactor steam generator primary side environments ( Ref 20 ). Microsegregation in the Fusion Zone of Autogenous Welds When a weld solidifies, an inhomogeneous dendritic structure forms. Solidification begins with the highest-melting-point liquid...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320195
EISBN: 978-1-62708-332-4
... Microsegregation of alloying elements needs to be avoided in order to achieve a uniform austempering response. High nodule count in the casting minimizes microsegregation. Close control of alloying and good inoculation practices, as described in Chapter 9 , “ Engineering Ductile Iron Castings ,” in this book...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000025
EISBN: 978-1-62708-313-3
... and the elimination of as much microsegregation as possible. In aging, or precipitation hardening, the elements taken into solid solution during solution treatment are precipitated in a favorable type and morphology. This controlled precipitation process is usually a multistep process that takes place at various...