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coarse microstructure

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410021
EISBN: 978-1-62708-280-8
... thicknesses in different processes. Reprinted with permission from Ref 1 Figure 3.4 ( Ref 2 ) shows the differences in microstructure between DAS of 30 and 60 μm. These are more typical of sand castings. The coarse microstructure is invariably associated with larger pore fractions because...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610209
EISBN: 978-1-62708-303-4
... of alpha grain size. B/T-RD, basal/transverse texture, rolling direction; WQ, water quench. (c) Duplex microstructure. Effect of width of alpha lamellae. Source: Ref 24 , 26 Fig. 47 da / dn -Δ K curves of microcracks in Ti-6Al-4V. CL, coarse lamellar; EQ, equiaxed. Source: Ref 28...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410277
EISBN: 978-1-62708-265-5
... and A 1 temperatures, respectively, and ensures that coarse-grained equiaxed ferrite and pearlite with coarse interlamellar spacing will form, producing microstructures of high ductility and moderate strength. Once the austenite has fully transformed to ferrite and pearlite, the cooling rate can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400023
EISBN: 978-1-62708-258-7
... in Fig. 2.24 , the packet size is very coarse (a packet is outlined by arrows). A lath would be one of the subunits within the packet. An example of lath martensite in an as-quenched commercial alloy steel is shown in Fig. 2.25 . This microstructure represents a more typical fine packet size. During...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130311
EISBN: 978-1-62708-284-6
... proper hardening and tempering procedures. (a) Surface and (b) core microstructure of a nitrided forging tool, showing (in a) the problems of a coarse white layer and nitrides on grain boundaries. (c) and (d) Extracted from a die-casting die failure analysis, also for surface and core respectively. Note...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410133
EISBN: 978-1-62708-265-5
... fractions of carbides stable at the lower temperatures. Fig. 8.9 Formation of austenite around cementite particles in spheroidized steel. Light micrographs. Source: Ref 8.16 Fig. 8.10 Austenite formation from a coarse spheroidized microstructure as a function of time. Source: Ref 8.16...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770099
EISBN: 978-1-62708-337-9
... Somewhat coarsened; solution of excess carbide favored; austenite retention promoted in highly alloyed steels Refined; maximum core strength and hardness; better combination of strength and ductility than B D: Best treatment for coarse-grained steels Refined; solution of excess carbide favored...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560005
EISBN: 978-1-62708-291-4
...Abstract Abstract This chapter discusses the development of the nomenclature used to describe the constitution and structure of metals and alloys, particularly the phases observed in the microstructure of steel. It also points out some of the problems with current nomenclature and provides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170573
EISBN: 978-1-62708-297-6
..., which causes severe embrittlement. Fig. 1 Microstructures of 90WC-10Co cemented carbide (straight grade). The light constituent is the cobalt binder. (a) Fine grain size. (b) Medium grain size. (c) Coarse grain size. All at 1500× In recent years, WC-Co alloys with submicron carbide grain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000203
EISBN: 978-1-62708-312-6
... Photomicrograph of 1260 °C (2300 °F), hydrogen sintered 434L showing a mixed microstructure of coarse and fine grains. Glyceregia etch Fig. 20 Photomicrograph of 1316 °C (2400 °F), hydrogen sintered 409LNi showing martensitic (light colored) and ferritic grains (dark colored). Columbium compounds...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310127
EISBN: 978-1-62708-326-3
... pearlite colonies in an AISI-SAE 1080 steel. Fine and coarse refer to the spacing between the lamella, and many more colonies appear in the fine pearlite. 4% picral etch. Original magnification 500× Source: Ref 15 Fig. 16 Effect of prior microstructure on spheroidizing a 1040 steel at 700 °C...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410113
EISBN: 978-1-62708-265-5
... This chapter describes the ferritic microstructures that form in carbon steels under continuous cooling conditions. It begins with a review of the Dubé classification system for crystal morphologies. It then explains how cooling-rate-induced changes involving carbon atom diffusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700199
EISBN: 978-1-62708-279-2
... Microstructures of (a) coarse-grained (CG), (b) fine-grained (FG), and (c) ultrafine-grained dual-phase (DP) steel. Magnification: 3000× for all images. Source: Ref 13.6 Fig. 13.14 Twin formation after (a) true strain ε = 0.1 and (b) true strain ε = 0.3. Source: Ref 13.5 Fig. 13.6...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410293
EISBN: 978-1-62708-265-5
..., on cooling grain-boundary nucleated ferrite can grow only a limited distance into coarse austenite grains before pearlite formation begins, and the base microstructure consists of thin networks of ferrite grains surrounding large areas of pearlite. Examples of the latter type of microstructure are shown...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700095
EISBN: 978-1-62708-279-2
... for three grain sizes of dual-phase steel, martensite volume fraction ~30% Microstructure DP Steel Grain size, μm Yield strength, MPa (ksi) Ultimate tensile strength, MPa (ksi) Uniform elongation, % Total elongation, % Strain hardening, n Coarse grain 12.4 445 (65) 870 (126) 7.2 7.7...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240153
EISBN: 978-1-62708-251-8
... lamellae can also influence the properties of pearlite. Fine cementite lamellae can be deformed, as compared with coarse lamellae, which tend to crack during deformation. Although fully pearlitic steels with a lamellar microstructure have high strength, high hardness, and good wear resistance...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.9781627082655
EISBN: 978-1-62708-265-5
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700023
EISBN: 978-1-62708-279-2
... and slow continuous cooling rates. Source: Ref 2.1 Fig. 2.10 Micrographs of (a) coarse pearlite and (b) fine pearlite of eutectoid steel. Source: Ref 2.1 Fig. 2.11 Martensite microstructure (needle-shaped grains) and retained austenite (white matrix). Source: Ref 2.1 Fig...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410499
EISBN: 978-1-62708-265-5
... in a 1042 steel is affected by heating rate and microstructure. The high heating rates of induction heating substantially raise Ac 3 . Microstructures with coarse carbides, such as the 1042 steel in the annealed condition as shown, or steels with coarse spheroidized microstructures or alloy carbides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140039
EISBN: 978-1-62708-335-5
...Abstract Abstract In castings, microstructural features are products of metal chemistry and solidification conditions. The microstructural features, excluding defects, that most strongly affect the mechanical properties or aluminum castings are size, form, and distribution of intermetallic...