1-20 of 58 Search Results for

hypereutectoid structure

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420143
EISBN: 978-1-62708-310-2
..., hypoeutectoid, and hypereutectoid structures and how they are affected by the addition of various alloying elements. The chapter also discusses the formation of peritectoid structures in the uranium-silicon alloy system. eutectoid structures eutectoid transformation hypereutectoid structures...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310001
EISBN: 978-1-62708-326-3
... the eutectic are referred to as hypereutectic cast irons. Likewise, steels with carbon below the eutectoid are referred to as hypoeutectoid steels , while steels with carbon above the eutectoid are referred to as hypereutectoid steels (as described further in Chapter 2 ). Note that any...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560185
EISBN: 978-1-62708-291-4
... hypereutectoid steels. It discusses the factors that influence the kinetics of the process, including carbon diffusion and the morphology of the original structure. It describes the nucleation and growth of austenite grains, the effect of grain size on mechanical properties, and the difference between coarse...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140009
EISBN: 978-1-62708-264-8
... (hypoeutectoid) and high-carbon (hypereutectoid) steels are made, how they are classified, and how they compare. It also describes eutectoid steels which, at 0.77 wt% C, form a separate class noted for its microstructure. chemical composition eutectoid steel iron-carbon phase diagram microstructure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560283
EISBN: 978-1-62708-291-4
... precipitation, the decomposition of retained austenite, and recovery and recrystallization. It also includes images that reveal the characteristic structures produced by tempering medium-carbon hypoeutectoid and hypereutectoid steels as well as the effects of plastic deformation, austenitic grain size, and...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560361
EISBN: 978-1-62708-291-4
..., and uniformity. It provides examples of oxides that form beneath the surface of steel and explains why it occurs. It describes the conditions associated with decarburization and explains how to determine the depth of decarburized layers in eutectoid, hypoeutectoid, and hypereutectoid steels. It also...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140021
EISBN: 978-1-62708-264-8
... 1 to near zero for temperatures just below A cm . The second method is most effective with hypereutectoid steels. It requires no quenching and is therefore used in industry to produce the spheroidized structures of cementite + ferrite in which these steels are supplied from the steel mill. In...
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
... Abstract This chapter examines the isothermal phase transformations of the iron-carbide system. The discussion includes the formation of ferritic, eutectoid, hypoeutectoid, hypereutectoid, bainitic, and martensitic microstructures as well as their properties, composition, and metallurgy. The...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560221
EISBN: 978-1-62708-291-4
... Abstract This chapter discusses the isothermal transformation of austenite to pearlite, bainite, martensite, proeutectoid ferrite, and proeutectoid cementite. It describes the transformation mechanisms in eutectoid, hypoeutectoid, and hypereutectoid steels, the factors that influence nucleation...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310029
EISBN: 978-1-62708-326-3
... grain structure. However, if the austenite in hypereutectoid steels is rapidly cooled, the transfer of iron atoms across ferrite and austenite interfaces is restricted, and the diffusion-controlled growth of ferrite is replaced by a shear mechanism. As a result, a plate-shaped morphology of ferrite...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560125
EISBN: 978-1-62708-291-4
... in all hypereutectoid steels likewise, but the spacing in the latter is much coarser than in the former. This is so generally and would seem to be related to the effect of the proeutectoid constituent on nucleation of pearlite, a phenomenon discussed in Chapter 9 . Both proeutectoid constituents...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410277
EISBN: 978-1-62708-265-5
... the Ac 1 temperature for hypereutectoid steels, and slowly cooled in furnaces after heating has ceased. When the term “annealing” is used without an adjective in reference to carbon steels, full annealing is the implied heat treatment practice ( Ref 13.2 ). Full annealing involves austenite formation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560029
EISBN: 978-1-62708-291-4
... transformation products form during slow cooling. Other alloys contain a proeutectoid phase that forms before the eutectoid transformation takes place. The proeutectoid phase is ferrite in hypoeutectoid steels (<0.8% C) and cementite in hypereutectoid steels (>0.8% C). During cooling, transformation of...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560165
EISBN: 978-1-62708-291-4
... then precipitates with a Widmanstätten morphology. The structure obtained when a hypereutectoid steel containing its proeutectoid cementite as grain-boundary allotriomorphs [1] is heated to a temperature slightly above the A 1 temperature and then cooled slowly consists of well-spheroidized...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430027
EISBN: 978-1-62708-253-2
..., the structure is ferrite + austenite. At the A 3 temperature, the transformation to austenite will be complete and thus a single-phase austenite will form. Likewise, in hypereutectoid steel (1.2 wt.% C), the transformation begins at the A 1 temperature by the transformation of pearlite to austenite...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560005
EISBN: 978-1-62708-291-4
... evidence, which suggested that in hypereutectoid steels the active nucleus is cementite, whereas in hypoeutectoid steels the active nucleus is ferrite ( Ref 93 ). Hillert denied that nucleation of pearlite could be defined in any simple way and described the genesis of the structure in terms of gradual...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410039
EISBN: 978-1-62708-265-5
... below the A 3 temperature in steels that contain less than the eutectoid carbon content ( hypoeutectoid steels), and cementite forms below the A cm in steels containing more than the eutectoid carbon content ( hypereutectoid steels). The ferrite and cementite that form prior to the eutectoid...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410163
EISBN: 978-1-62708-265-5
... inclusions, pearlite eventually forms in the low-manganese regions. Most studies of banding have concentrated on hypoeutectoid steels as discussed previously ( Ref 9.65 ), but Verhoeven has examined banding in hypereutectoid steels relative to the beauty of textures produced on the blades of Damascus...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480075
EISBN: 978-1-62708-318-8
... similar to pearlite in steel. Now consider an alloy of composition C 3 (hypereutectoid alloy), which is very high in alloy content. When this alloy is quenched to temperature T α , the gamma phase precipitates until the beta phase composition reaches line BF ; then both alpha and gamma...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720161
EISBN: 978-1-62708-305-8
..., 5–10 min; do not boil dry Colors cementite, but not carbides high in chromium; attacks sulfides; delineates grain boundaries in hypereutectoid steels in slowly cooled condition Hydrogen peroxide and sodium hydroxide 10 mL H 2 O 2 (30%), 20 mL NaOH 10% solution in distilled water Must be fresh...