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secondary dendrite arm spacing

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Published: 01 January 2015
Fig. 9.17 Secondary dendrite arm spacing as a function of distance from the chill surface of steel from various low-carbon and stainless steel casters. Source: Adapted from Ref 9.50 More
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Published: 01 January 2015
Fig. 9.18 Secondary dendrite arm spacing as a function of distance across an as-cast slab of 1020 steel. Source: Ref 9.51 More
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Published: 01 June 2008
Fig. 7.11 Effect of solidification time on secondary dendrite arm spacing. Source: Ref 3 More
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Published: 01 June 2008
Fig. 7.12 Effect of secondary dendrite arm spacing on mechanical properties of aluminum casting alloy. Source: Ref 3 More
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Published: 01 August 2018
Fig. 8.19 Secondary dendrite arm spacing as a function of cooling rate in steels (experimental data). Source: Ref 4 , 10 More
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Published: 01 March 2012
Fig. B.10 Effect of solidification time on secondary dendrite arm spacing. Source: Ref B.5 as published in Ref B.2 More
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Published: 01 March 2012
Fig. B.11 Effect of secondary dendrite arm spacing on properties of aluminum casting alloy. Source: Ref B.5 as published in Ref B.2 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420429
EISBN: 978-1-62708-310-2
.... The severe plastic deformation that occurs during hot working will heal internal porosity and help break up and eliminate segregated areas. Fig. B.9 Segregation in killed steel ingot. Source: Ref B.1 as published in Ref B.2 B.5 Grain Refinement and Secondary Dendrite Arm Spacing Rapid...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240095
EISBN: 978-1-62708-251-8
..., gravity, micro, and inverse. The chapter also provides information on grain refinement and secondary dendrite arm spacing and porosity and shrinkage in castings. It concludes with a brief overview of six of the most important casting processes in industries: sand casting, plaster mold casting, evaporative...
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Published: 01 November 2013
Fig. 6 Growing dendrite tip and dendrite root during columnar growth in a casting. A dendritic form is usually characterized in terms of the primary (dendrite trunk) spacing, λ 1 , and the secondary (dendrite arm) spacing, λ 2 . Source: Ref 2 More
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Published: 01 December 2016
Fig. 1.4 Morphology of branched dendrite crystals and identification of specific geometry features: first-order axis and second-order axis. λ 1 (dendrite arm size, DAS), distance between the dendrite axes of the first order; λ 2 (secondary dendrite arm spacing, or SDAS), distance between More
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Published: 01 August 2018
is the spacing between secondary arms. SEM, SE, no etching. Nb-rich, Nb-Cu alloy, arc melted. The two metals have very limited miscibility in the solid state; after solidification is complete, copper is selectively dissolved by chemical etching, leaving behind only the primary niobium dendrites. Courtesy S More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410163
EISBN: 978-1-62708-265-5
..., and possible formation of spherical solid particles by separation from dendrite arms at points of reduced radii of curvature ( Ref 9.49 ). The extent of interdendritic segregation is frequently related to secondary dendrite arm spacing , the spacing of dendrite branches normal to the major dendrite axis...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410021
EISBN: 978-1-62708-280-8
... dendrite arm spacing (SDAS or DAS) in structure and higher volume of distributed porosity than castings produced in metal molds. Green sand molded castings show slightly larger gas pores due to the hydrogen absorbed from the dissociated moisture in the sand. Figure 3.2 shows additional casting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140039
EISBN: 978-1-62708-335-5
... separating the arms of primary and secondary dendrites and are exclusively controlled for a given composition by solidification rate ( Fig. 4.1 ). Fig. 4.1 Dendrite arm spacing and dendrite cell size as a function of local solidification rate. Source: Ref 1 There are at least three...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2016
DOI: 10.31399/asm.tb.ascaam.t59190001
EISBN: 978-1-62708-296-9
... of specific geometry features: first-order axis and second-order axis. λ 1 (dendrite arm size, DAS), distance between the dendrite axes of the first order; λ 2 (secondary dendrite arm spacing, or SDAS), distance between the dendrite axes of the second order. Source: Ref 8 , 10 Spatial orientation...
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
..., and in weld metal, where the small liquid pool allows even faster cooling rates, the spacings can be as small as 100 μm. The diameters of the dendrite main stalks (called primary dendrite arms) are smaller than their spacing, d , by approximately 10 times. The diameter of a human hair is approximately 50 μm...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220129
EISBN: 978-1-62708-259-4
... of micrometers to millimeters. The most common measurement to characterize dendrite spacing is the spacing between secondary arms. SEM, SE, no etching. Nb-rich, Nb-Cu alloy, arc melted. The two metals have very limited miscibility in the solid state; after solidification is complete, copper is selectively...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850001
EISBN: 978-1-62708-260-0
... be detected occasionally. Figure 1-17 Dendrites observed on a broken section of cast iron. The primary and secondary arm spacings have been measured in solidification studies. The secondary arm spacing has been shown to be a sensitive measure of solidification phenomena. While most studies have...
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
... demonstrated that the effect of solidification rate on the dendrite arm spacing ( d ) is: (Eq 5) d = a ( G R ) − n where a is a constant and n is approximately 1 2 for primary arms and between 1 3 and 1 2 for secondary dendrite...