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Book Chapter

Transformation of Austenite

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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...
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 and growth, and the characteristic features of the various microstructures. It also describes the transformation of austenite during continuous cooling.
View PDF for content titled, <span class="search-highlight">Transformation</span> of <span class="search-highlight">Austenite</span>
Book Chapter

Transformation of Austenite and Quenching of Steel

Available to Purchase

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...
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 transformation and continuous cooling transformation diagrams that characterize the conditions that produce the various microstructures. It discusses the mechanism and process variables of quenching of steel, explaining the factors involved in the mechanism of quenching. In addition, the chapter provides information on the causes and characteristics of residual stresses, distortion, and quench cracking of steel.
View PDF for content titled, <span class="search-highlight">Transformation</span> of <span class="search-highlight">Austenite</span> and Quenching of Steel
Image

Influence of heating rate and carbon content on austenitic transformation t...

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in Induction Hardening > Failure Analysis of Heat Treated Steel Components
Published: 01 September 2008
Fig. 17 Influence of heating rate and carbon content on austenitic transformation temperature. Source: Ref 38 More
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Calculated fraction austenite transformed to pearlite as a function of time...

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in Pearlite, Ferrite, and Cementite > Steels: Processing, Structure, and Performance
Published: 01 January 2015
Fig. 4.6 Calculated fraction austenite transformed to pearlite as a function of time for the parameters shown. Source: Ref 4.2 More
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Sketch of advancing interface as austenite transforms to ferrite

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in The Various Microstructures of Room-Temperature Steel > Steel Metallurgy for the Non-Metallurgist
Published: 01 November 2007
Fig. 4.10 Sketch of advancing interface as austenite transforms to ferrite More
Image

Isothermal transformation of austenite to pearlite in eutectoid carbon stee...

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in Steel Fundamentals > Advanced-High Strength Steels: Science, Technology, and Applications
Published: 01 August 2013
Fig. 2.5 Isothermal transformation of austenite to pearlite in eutectoid carbon steel. Source: Ref 2.1 More
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Isothermal transformation of eutectoid steel from austenite to pearlite ( A...

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in Steel Fundamentals > Advanced-High Strength Steels: Science, Technology, and Applications
Published: 01 August 2013
Fig. 2.6 Isothermal transformation of eutectoid steel from austenite to pearlite ( A - P ) and austenite to bainite ( A - B ). Source: Ref 2.1 More
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Dilatometric curves for the transformation of austenite in 20KhGR and 12KhN...

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in Sources of Failures in Carburized and Carbonitrided Components > Failure Analysis of Heat Treated Steel Components
Published: 01 September 2008
Fig. 31 Dilatometric curves for the transformation of austenite in 20KhGR and 12KhN3A steels. Curves (a) and (b) were after carburizing, and curves (c) and (d) were before carburizing. (a,c) 20KhGR. (b,d) 12KhN3A. The cooling rates are: 1, 0.79; 2, 1.46; 3, 4.6; 4, 5.0; 5, 70; 6, 175 °C/min More
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Schematic presentation of the transformation of austenite in ferrite in con...

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in Equilibrium Phases and Constituents in the Fe-C System > Metallography of Steels: Interpretation of Structure and the Effects of Processing
Published: 01 August 2018
Fig. 7.2 Schematic presentation of the transformation of austenite in ferrite in conditions close to equilibrium. Adapted from: Ref 10 More
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Schematic presentation of the transformation of austenite in pearlite in co...

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in Equilibrium Phases and Constituents in the Fe-C System > Metallography of Steels: Interpretation of Structure and the Effects of Processing
Published: 01 August 2018
Fig. 7.13 Schematic presentation of the transformation of austenite in pearlite in conditions close to equilibrium. Steel has a eutectoid composition. P = pearlite. Source: Ref 10 More
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Schematic presentation of the transformation of austenite in pro-eutectoid ...

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in Equilibrium Phases and Constituents in the Fe-C System > Metallography of Steels: Interpretation of Structure and the Effects of Processing
Published: 01 August 2018
Fig. 7.22 Schematic presentation of the transformation of austenite in pro-eutectoid ferrite and pearlite (P) in conditions close to equilibrium. Steel has hypo-eutectoid composition. Adapted from: Ref 10 More
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Schematic presentation of the transformation of austenite in pro-eutectoid ...

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in Equilibrium Phases and Constituents in the Fe-C System > Metallography of Steels: Interpretation of Structure and the Effects of Processing
Published: 01 August 2018
Fig. 7.31 Schematic presentation of the transformation of austenite in pro-eutectoid cementite and pearlite (P) in conditions close to equilibrium. Steel has hyper-eutectoid composition. Adapted from: Ref 10 More
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Transformation from austenite to martensite. bct, body-centered tetragonal....

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in Nonequilibrium Reactions: Martensitic and Bainitic Structures > Phase Diagrams: Understanding the Basics
Published: 01 March 2012
Fig. 15.8 Transformation from austenite to martensite. bct, body-centered tetragonal. Source: Ref 15.2 More
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The progression of transformation of austenite to martensite in case-carbur...

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in Surface Oxidation, Decarburization, and Carburizing > Light Microscopy of Carbon Steels
Published: 01 August 1999
Fig. 12.22 (Part 4) (j) The progression of transformation of austenite to martensite in case-carburized bar during quench hardening. A, case in which there is a uniform carbon gradient; B, case in which the carbon content reaches a maximum slightly beneath the surface. After Ref 20 . More
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Martensite microstructure. The transformation of austenite to martensite wa...

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in Metallography—The New Science of Metals > The History of Metals in America
Published: 01 May 2018
FIG. 4.5 Martensite microstructure. The transformation of austenite to martensite was not understood until much additional research was performed. More
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Transformation curves for retained austenite in an air-hardening A2 tool st...

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in Air-Hardening, Cold-Work Tool Steels > Tool Steels
Published: 01 January 1998
Fig. 11-9 Transformation curves for retained austenite in an air-hardening A2 tool steel containing 1.00% C, 0.61% Mn, 0.17% Si, 5.31% Cr, 0.27% V, and 1.13% Mo, air cooled from 980 °C (1800 °F). Source: Ref 5 More
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Transformation curves for austenite retained in hardened D2 tool steel. Sou...

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in High-Carbon, High-Chromium, Cold-Work Tool Steels > Tool Steels
Published: 01 January 1998
Fig. 12-13 Transformation curves for austenite retained in hardened D2 tool steel. Source: Ref 12 More
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Retained austenite as a function of transformation temperature and time in ...

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in Low-Carbon Steels > Steels: Processing, Structure, and Performance
Published: 01 January 2015
Fig. 12.24 Retained austenite as a function of transformation temperature and time in microstructures produced by isothermal holding of a 0.14% C-1.21% Si-1.57% Mn steel intercritically annealed at 770 °C (1420 °F). Source: Ref 12.61 More
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Transformation of retained austenite in an Fe-1.22C alloy as a function of ...

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in Tempering of Steel > Steels: Processing, Structure, and Performance
Published: 01 January 2015
Fig. 17.16 Transformation of retained austenite in an Fe-1.22C alloy as a function of time at three tempering temperatures. Source: Ref 17.29 More
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Strain-induced transformation of retained austenite to martensite as a func...

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in Surface Hardening > Steels: Processing, Structure, and Performance
Published: 01 January 2015
Fig. 21.30 Strain-induced transformation of retained austenite to martensite as a function of strain. As-quenched tempered martensite is dark, retained austenite is white, and strain-induced martensite is orange. Sodium metabisulfite etch, 1000×, light micrographs. Courtesy of Marc Zaccone More