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austenite decomposition

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Published: 01 November 2007
Fig. 4.23 Austenite decomposition products for plain carbon steels during isothermal transformation (quenching and holding) at various temperatures below A 1 More
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Published: 01 December 1996
Fig. 9-1 Schematic illustration of the effect of the decomposition of austenite during cooling on the transformation products present after quenching More
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Published: 01 December 1996
Fig. 9-46 Calculated start curve of the decomposition of austenite upon continuous cooling for 4068 steel. (From same source as Fig. 9-45 ) More
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Published: 01 November 2007
Fig. 4.4 Phase diagram analysis of the decomposition of 0.4 and 0.95% C austenite on cooling to the pearlite temperature, 727 °C (1340 °F) More
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Published: 01 January 1998
Fig. 8-3 IT diagram for decomposition of austenite in an L-type tool steel containing 1.01% C, 0.50% Mn, 0.30% Si, and 1.21% Cr. Specimens were austenitized for 30 min at 815 °C (1500 °F). Source: Ref 3 More
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Published: 01 January 1998
Fig. 8-12 Isothermal decomposition of austenite at room temperature in an L2 steel, containing 1.0% C, 1.56% Cr, and 0.20% V, after different quenching treatments. Specimens quenched to temperatures above room temperature were held at temperature for 5 min and air cooled. Source: Ref 13 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220193
EISBN: 978-1-62708-259-4
... Abstract Heat treatment is the most common way of altering the mechanical, physical, and even chemical properties of steels. This chapter describes the changes that occur in carbon and low-alloy steels during conventional heat treatments. It explains how austenite decomposition largely defines...
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Published: 01 August 2018
to 650 °C (1200 °F), at 1.0 °C/s (2 °F/s), and quenched in flowing helium. The carbon enrichment in the white areas, together with the austenite decomposition, was sufficient for the formation of MA on quenching. Etchant: LePera. Optical microscope, polarized light. Courtesy of M. S. Andrade, CETEC, MG More
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Published: 01 August 2018
Fig. 10.57 Dilatometry measurements of the linear expansion (length change) of a steel slowly and rapidly cooled. During slow cooling the volume change associated with austenite decomposition happens at high temperatures, when the material is very ductile and has lower yield strength. Stresses More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410113
EISBN: 978-1-62708-265-5
... Considerations—Cooling-Rate-Induced Changes in Ferrite The various ferrite morphologies and other microstructural products of austenite decomposition result from increasingly restricted atom motion with decreasing temperature of transformation. Iron atom rearrangement from austenite to equiaxed ferrite...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310055
EISBN: 978-1-62708-326-3
... Abstract The decomposition of austenite, during controlled cooling or quenching, produces a wide variety of microstructures in response to such factors as steel composition, temperature of transformation, and cooling rate. This chapter provides a detailed discussion on the isothermal...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410099
EISBN: 978-1-62708-265-5
... of cementite in ferritic microstructures makes possible a clear differentiation of intermediate-temperature-transformation products of austenite decomposition. According to a microstructural definition of bainite in steels as a non-lamellar ferrite-cementite product of austenite transformation, Aaronson et...
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Published: 01 August 2018
Fig. 16.40 (a) The duplex stainless steel presented in Fig. 16.30 after a 12 h treatment at 750 °C (1380 °F). All ferrite has decomposed into austenite and sigma (σ). Larger austenite grains and finer structure composed of austenite and sigma (including some sigma at larger austenite grain More
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...
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Published: 01 August 2018
Fig. 16.34 ASTM A890/A890M Grade 6A cast duplex stainless steel annealed at 980 °C (1795 °F) and quenched. Austenite (light) and ferrite. At this temperature, ferrite decomposes into austenite and sigma phase (σ). Thus, there are two types (and sizes) of austenite: large grains, formed prior More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1996
DOI: 10.31399/asm.tb.phtpclas.t64560003
EISBN: 978-1-62708-353-9
... Abstract This chapter describes the two types of Time-Temperature-Transformation (TTT) diagrams used and outlines the methods of determining them. As a precursor to the examination of the decomposition of austenite, it first reviews the phases and microconstituents found in steels...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.htgpge.t67320005
EISBN: 978-1-62708-347-8
.... It addresses the processes involved in the transformation (decomposition) of austenite to achieve various microstructures. austenite transformation iron-carbon phase diagram melting point steel HEATING PURE IRON to its melting point and then allowing it to cool slowly results in an idealized time...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900193
EISBN: 978-1-62708-358-4
... carbides formed at lower temperatures by austenite decomposition to ferrite-carbide microstructures, annealing, or tempering, and spheroidization of the carbides in those microstructures. Figure 11-1(a) shows a high density of smaller, secondary carbides that have been spheroidized by lengthy annealing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220273
EISBN: 978-1-62708-259-4
... sure that the decomposition of austenite only happens under the desired, slow cooling conditions. These parts can be cooled under insulated campanulas or boxes, buried in thermal insulating minerals such as vermiculite, powdered lime, dry sand, ashes, or other media. It is essential to guarantee slow...
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Published: 01 December 1996
Fig. 9-41 Schematic illustration of the mathematical relations needed to determine the progress of the decomposition of austenite during cooling More