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eutectic grain structure

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2016
DOI: 10.31399/asm.tb.ascaam.t59190001
EISBN: 978-1-62708-296-9
.... , and Taylor J.A. , Three-Dimensional Analysis of Eutectic Grains in Hypoeutectic Al-Si Alloys , Mat. Sci. Eng. A-Struct. , Vol 392A , 2005 , p 440 – 448 10.1016/j.msea.2004.10.037 63. Wołczyński W.S. , Lamella/Rod Transformation as Described by the Criterion of Minimum Entropy...
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
... and scale of eutectic structures, and the competitive growth of dendrites and eutectic colonies or cells. It also examines the different types of precipitation structures that form during slow cooling cycles. aluminum-silicon alloys eutectic systems lead-tin-alloys microstructure precipitation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140039
EISBN: 978-1-62708-335-5
...; dendrite arm spacing; grain size and shape; and eutectic modification and primary phase refinement. This chapter discusses the effects of these microstructural features on properties and methods for controlling them. The chapter concludes with a detailed examination of the refinement of hypereutectic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480031
EISBN: 978-1-62708-318-8
... Abstract This chapter describes the structures, phases, and phase transformations observed in metals and alloys as they solidify and cool to lower temperatures. It begins with a review of the solidification process, covering nucleation, grain growth, and the factors that influence grain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2016
DOI: 10.31399/asm.tb.ascaam.t59190vii
EISBN: 978-1-62708-296-9
... crystallites (grains) of condensed phases—that is, solid solutions, intermetallic phases, and nonmetallic inclusions. This internal construction bears the external loading. The grains (in casting alloys also dendrite grains and eutectic grains) represent a small volume of material and are strictly defined...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230199
EISBN: 978-1-62708-298-3
... properly prepared, microscopic examination presents no problem. It can be examined under polarized light for grain structure or under bright-field illumination for identification of inclusions or second phases. It can be photographed for record or report purposes, in black and white or in color...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060013
EISBN: 978-1-62708-261-7
... with a uniform chemical composition and structure. For example, when all the grains (or crystalline particles) in a metal or alloy have the same type of chemical composition and share the same crystalline structure, then it is a single-phase alloy. In contrast, in a two-phase alloy there are regions within...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400023
EISBN: 978-1-62708-258-7
... at the cube corners, as in the FCC structure, but in the body-centered structure, an iron atom occupies a position at the center of the cube. Of course, a crystal of iron consists of many millions of cells aligned in an orderly array in three dimensions. These crystals are the grains that one observes...
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
... - An Index of Metal Quality, ” BCIRA J. , vol. 8 , no. 2 , 1960 , pp. 221 – 231 . 17. Adams R. R. : “ Cast Iron Strength vs. Structure, ” Trans. Am. Foundrymen’s Soc. , vol. 50 , 1942 , pp. 1063 – 1103 . 18. Merchant H.D. : “ Metallography of Eutectic Cells in Cast Iron...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220129
EISBN: 978-1-62708-259-4
... the liquid, cooperative growth mechanisms are common. Depending on the crystal structure of the solid forms, there may be preferred orientations between the two solids, and aesthetically interesting structures may be formed. In the stable Fe-C system, there is one eutectic reaction: L = γ + graphite...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170351
EISBN: 978-1-62708-297-6
... and 319 Fig. 24 As-cast Al-7Si ingots showing the effects of grain refinement. (a) No grain refiner. (b) Grain-refined. Both etched using Poulton’s etch; both 2x Hypoeutectic aluminum-silicon alloys can be improved by inducing structural modification of the normally occurring eutectic...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310001
EISBN: 978-1-62708-326-3
..., and the relative amount of each type of atom present. Solids have either random (amorphous) structures or spatially symmetric ( crystalline ) structures. The phase of a solid refers to a physically distinct portion of a material with a uniform chemical composition and structure. For example, when all the grains...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420143
EISBN: 978-1-62708-310-2
... lattice at elevated temperatures. In addition, diffusion is faster in the more loosely packed bcc ferrite structure than the closer packed fcc austenite structure. However, diffusion in solids during a eutectoid reaction is much slower than in liquids during the eutectic reaction. Therefore...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420289
EISBN: 978-1-62708-310-2
... in electric motor housings that had been extruded from aluminum produced from a combination of recycled and virgin metal. Extensive studies revealed that the cracking was caused by small amounts of lead and bismuth in the recycled metal reacting to form bismuth-lead eutectic at the grain boundaries at 327...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420117
EISBN: 978-1-62708-310-2
... structures in iron-base alloys and multicomponent systems. microstructure peritectic systems peritectic transformation SIMILAR TO THE EUTECTIC group of invariant transformations is a group of peritectic reactions, in which a liquid and solid phase decomposes into a new solid phase on cooling...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060085
EISBN: 978-1-62708-261-7
... Abstract This chapter describes the processes involved in alloy production, including melting, casting, solidification, and fabrication. It discusses the effects of alloying on solidification, the formation of solidification structures, supercooling, nucleation, and grain growth. It describes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140007
EISBN: 978-1-62708-335-5
... and property development. Minor alloying elements control solidification behavior, modify eutectic structure, refine primary phases, refine grain size and form, promote or suppress phase formation, and reduce oxidation. Impurity elements influence castability and the form of insoluble phases...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240487
EISBN: 978-1-62708-251-8
...; this helps reduce oxide formation and hydrogen pickup and produces a fine-grained structure. It can also produce fairly large ingots at slow speeds, a necessary requirement for the high-strength alloys to prevent cracking. Typical casting speeds are in the range of 2.5 to 13 cm/min (1 to 5 in./min...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170107
EISBN: 978-1-62708-297-6
... to 2.2% Si, 5 to 7% Ni, and 7 to 11% Cr. In the as-cast condition, it has a structure of M 7 C 3 eutectic carbides in a martensitic matrix. If retained austenite is present, the martensite content and hardness of the alloy can be increased by refrigeration treatment or by reaustenitizing and air cooling...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240597
EISBN: 978-1-62708-251-8
... in nuclear reactors. Beryllium is an extremely lightweight metal that, as a result of its high specific modulus, is used in high-value aerospace structures. Lead and tin form the most widely used solders, and lead is the most important of the battery materials. Gold, silver, and the platinum group are all...