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matrix microstructure

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170062
EISBN: 978-1-62708-297-6
.... As-cast matrix microstructures usually consist of ferrite, pearlite, or both, depending on the cast section size and/or alloy composition. Common heat treatments and their purposes and resulting microstructures include: Annealing, to improve ductility and toughness, reduce hardness, and remove carbides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000025
EISBN: 978-1-62708-313-3
... the matrix phase and geometrically and topologically close-packed phases, and describes how superalloy microstructure can be modified via heat treatments and directional solidification. It also discusses the role of carbides, borides, oxides, and nitrides and the detrimental effects of sulfocarbides...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170100
EISBN: 978-1-62708-297-6
... for each 1 in. of casting section thickness) prior to uniform quenching in oil, the matrix microstructure will not be uniform in combined carbon. This nonuniformity reduces machinability. If the hardness is reduced by extended tempering, the resulting structure may not have a good response to selective...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410277
EISBN: 978-1-62708-265-5
..., especially spheroidizing treatments that produce such carbides in a matrix of ferrite, are also discussed in this chapter. Full Annealing Normalizing Spheroidizing and Spherical Carbides Mechanical Properties of Ferrite-Pearlite Microstructures References References 13.1 Thelning K...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280025
EISBN: 978-1-62708-267-9
... grain sizes in cast alloys, as noted previously. Microstructure includes not only grain size and morphology but also the type and distribution of secondary phases in the superalloy austenitic matrix. Superalloys contain a variety of elements in a large number of combinations to produce desired...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060247
EISBN: 978-1-62708-261-7
..., respectively, much like that in steels. As in steel, the five basic matrix structures in cast iron include: ferrite, pearlite, bainite, martensite, and austenite. Thus, cast irons can develop very complex variations of microstructure, depending on the forms of the carbon-rich phase and the microstructure...
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
... and are readily cast in the shapes needed in the machinery used for crushing, grinding, and general handling of abrasive materials. The large volume of eutectic carbides in their microstructures provides the high hardness needed for crushing and grinding other materials. The metallic matrix supporting the carbide...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310331
EISBN: 978-1-62708-326-3
..., the response may be satisfactory, but an entirely ferritic matrix, typical of grades with high ductility, requires several minutes at 870 °C (1600 °F) to be fully hardened by subsequent cooling. A matrix microstructure of fine pearlite, readily obtained by normalizing, has a rapid response to surface hardening...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220583
EISBN: 978-1-62708-259-4
... is distributed in the product and its size are important metallographic features and are routinely characterized. Furthermore, the matrix microstructure of cast irons can also be used for their classification. Apart from graphite, cast iron microstructures present the same constituents as steels. Table 17.1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440207
EISBN: 978-1-62708-262-4
... Fig. 2 Typical microstructures of four types of cast iron. (a) Gray iron showing graphite flakes (black) in a pearlite matrix. 380×. (b) White cast iron showing massive carbides (white) and pearlite. 380×. Malleable iron showing graphite nodules in a ferrite matrix. 380×. (d) Ductile iron showing...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770051
EISBN: 978-1-62708-337-9
... Calculated stress, tons/in. 2 Spherical case Cylindrical case Ferrostatic pressure in carbide WC −109 −72 Fe 3 C −21 −16 Radial stresses in matrix WC −109 −72 Fe 3 C −21 −16 Circumferential stresses in matrix WC +54 +72 Fe 3 C +10 +16 Axial stress in carbide WC...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300179
EISBN: 978-1-62708-323-2
... that produces a bainitic microstructure, which is harder than an annealed microstructure. The equilibrium matrix microstructures that are possible in cast irons are ferrite, pearlite, and cementite. However, cast irons can be heat treated like steels. The hardened microstructure in a carbon steel...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140175
EISBN: 978-1-62708-264-8
... in the irons in Table 16.3 arises during the cooldown in the casting process. To understand how the foundryman controls the microstructure of the iron-matrix part of both gray and ductile cast irons, it is useful to understand Fig. 16.8 . This figure shows how the phase diagram in Fig. 16.1 for pure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400023
EISBN: 978-1-62708-258-7
... reaction. The microstructure for this hypereutectoid alloy is shown in Fig. 2.7 . Here, one can see a pearlite matrix (dark etching constituent) with proeutectoid cementite (the white etching network at the prior austenite grain boundaries). There are also some plates of cementite that grew within...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410213
EISBN: 978-1-62708-265-5
... on strength and toughness, continuous and discontinuous yielding behaviors, and dispersion and solid-solution strengthening processes. aging deformation ductile-to-brittle transition ferrite fracture microstructure strengthening AT SOME STAGE OF PROCESSING, the matrix microstructure of all...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400001
EISBN: 978-1-62708-258-7
... these various properties, the matrix microstructure varies from ferritic for the lower strengths, to pearlitic for the intermediate strengths, to martensitic for the higher strengths. Further details on the composition of ductile irons can be found in the Appendix . Austempered Ductile Iron Compacted...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870537
EISBN: 978-1-62708-314-0
... discontinuously reinforced aluminum (Al) composites. Source: Ref 4 Fig. 20.1 Metal matrix composite reinforcements. Source: Ref 1 Fig. 20.2 Silicon carbide particulate Fig. 20.3 Microstructure of 20 volume percent silicon carbide particulate discontinuously reinforced aluminum...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610209
EISBN: 978-1-62708-303-4
... in a lamellar matrix) microstructures can be developed in near-alpha and alpha-beta alloys. Important microstructural parameters are the prior-beta grain size or colony size of the alpha and beta lamellae and the width of the alpha lamellae in fully lamellar microstructures. Additional parameters for duplex...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550569
EISBN: 978-1-62708-307-2
.... However, C-C composites have also been successfully utilized as commercial aircraft brakes, where their superior performance outweighs their increased costs. Carbon-carbon composites are composed of carbon fibers embedded in a carbon matrix. The microstructural characteristics, and therefore...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170021
EISBN: 978-1-62708-297-6
.... The flake graphite in gray irons is dispersed in a matrix with a microstructure that is determined by composition and heat treatment. The usual microstructure of gray iron is a matrix of pearlite with the graphite flakes dispersed throughout ( Fig. 1 ). The gray irons used most often and in the largest...