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segregation pattern

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Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003780
EISBN: 978-1-62708-177-1
... alloys, with the aid of black and white images. The article also provides information on the applications of etching and examination of uranium alloys, at both macro and micro scales, in characterizing the grain structures, segregation patterns, inclusions, and the metal flow geometries produced...
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
... zone, ℓ. The formation of a nonplanar interface causes solute segregation patterns, since the solid grows with a smaller composition than the alloy composition. The rejected solute accumulates in the intercellular/interdendritic region for alloy systems with phase diagrams in which the solute...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005525
EISBN: 978-1-62708-197-9
... of an array of columnar dendrites is obstructed mainly by the secondary dendrite arms, while the liquid moving perpendicular to that axis also must move around the primary arms, giving a very different flow pattern. One example of different permeability functions for flow parallel and perpendicular...
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
... revealed no freckles and very little macrosegregation in the DS scenario. Hence, freckling in the VAR ingot must be discounted. Furthermore, a refined mesh used to simulate macrosegregation in the domain of the VAR slab ingot produces segregation patterns that are qualitatively similar to Fig. 3...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006109
EISBN: 978-1-62708-175-7
... density, and compressibility of metal powders. It explains the mechanisms of powder segregation. The article provides information on green strength and springback value of rectangular test bar. It concludes with a discussion on the chemical composition of metal powders. angle of repose apparent...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006351
EISBN: 978-1-62708-179-5
... outlines the graphite nodules and reveals an absence of matrix substructure. On the other hand, color etching with aqueous 10% sodium metabisulfite can vividly reveal the dendritic segregation pattern in the austenitic matrix. (For more details on color metallography, see the article “Metallography...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005208
EISBN: 978-1-62708-187-0
... in the solid, combined with rapid transport in the liquid, leads to the Scheil equation for microsegregation. Finally, the principles of transport and scaling are applied to homogenization processes to ameliorate the undesirable segregation pattern. References References 1. Dantzig J.A...
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
... to ameliorate the undesirable segregation pattern. Acknowledgment This article originally appeared as “Transport Phenomena During Solidification,” by J.A. Dantzitg, Casting , Vol 15, ASM Handbook , ASM International, 2008, p 288–292. References References 1. Dantzig J.A. and Tucker...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005236
EISBN: 978-1-62708-187-0
... alloy, distinct by composition and atomic structure. Within one grain metallic alloys also show a microstructure caused by segregation patterns due to the dendritic growth instability of the growth front. Figure 1 presents a longitudinal cross section of a 0.17 m (7 in.) Al-7wt%Si cylindrical ingot...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005406
EISBN: 978-1-62708-196-2
.... The microstructure of a casting can consist of different grains of the same thermodynamic phase, distinct by orientation, or different phases of one alloy, distinct by composition and atomic structure. Within one grain metallic alloys also show a microstructure caused by segregation patterns due to the dendritic...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005940
EISBN: 978-1-62708-166-5
...) After round rolling stand. Source: Ref 26 Fig. 23 Macrostructure of the bar cross section (a) on the face of a forged disk and (b) sampling. Source: Ref 27 Fig. 24 Characteristic of fiber flow pattern of gear blanks described by (a) the distance y α and (b) its dependence...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006342
EISBN: 978-1-62708-179-5
... automatic devices are used, a multidirectional scratch pattern is produced, and thus, specimen reorientation is not required. Automatic devices provide the best flatness and graphite retention. Grinding with worn or loaded papers, or grinding in the same direction with each paper grade, degrades...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005216
EISBN: 978-1-62708-187-0
...% for the uppermost contour at approximately midheight). (b) Macrosegregation pattern. The gray shades indicate the titanium concentration, with the darkest shade inside the open channels in the mush corresponding to the largest positive macrosegregation. Channel segregates are also observed in large steel...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003250
EISBN: 978-1-62708-199-3
.... This map provides a method for characterizing chemical inhomogeneities on a spatial resolution scale midway between the ∼1 cm range of “bulk XRF” and the ∼1 μm scale of electron probe microanalysis, for example, characterizing segregation patterns in cross-sectioned ingots. Optical emission...
Book Chapter

By Samuel M. Purdy
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003750
EISBN: 978-1-62708-177-1
.... 1 Center segregation in an alloy steel billet (a) Graded C-1 in the graded series ( Ref 4 ). 0.625×. (b) Graded C-5 in the graded series ( Ref 4 ). 0.5×. Both samples etched in 50% aqueous HCl. Source: Ref 7 , courtesy of Republic Steel Ingot Pattern The conditions leading...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001766
EISBN: 978-1-62708-178-8
... be solved, at least in part, with AEM. analytical electron microscopes analytical transmission electron microscopy bright-field microscopy data analysis defect analysis deformation dislocations electron diffraction electron energy loss spectroscopy electron guns grain-boundary segregation...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
..., such as bursts. Internal stress concentrators can also be introduced during solidification of ingots from which forged shafts are made. Generally, these stress concentrators are internal discontinuities, such as pipe, segregation, porosity, shrinkage, and nonmetallic inclusions. Fractures also result from...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
.... The article discusses the types of imperfections that can be traced to the original ingot product. These include chemical segregation; ingot pipe, porosity, and centerline shrinkage; high hydrogen content; nonmetallic inclusions; unmelted electrodes and shelf; and cracks, laminations, seams, pits, blisters...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005202
EISBN: 978-1-62708-187-0
...: Tree ring patterns Freckles White spots Tree ring patterns can be identified in a macroetched transverse section as light-etching rings. They usually represent a negative crystal segregation. Tree ring patterns seem to have little effect on material properties. Freckles and white spots have...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003768
EISBN: 978-1-62708-177-1
... the presence of deformation and annealing twins in the austenite grains. Alcohol rinsing is again recommended to minimize staining of the specimen surface. Deep immersion etching, that is, longer etching times, can be used to reveal the solute segregation pattern within the austenite grains. In addition...