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phase decomposition

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420171
EISBN: 978-1-62708-310-2
..., and goes on to identify the most common superlattice structures and their corresponding alloy phases. It also discusses the factors that limit the formation of superlattices along with the kinetics of spinodal decomposition and its effect on microstructure development. antiphase boundaries...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240053
EISBN: 978-1-62708-251-8
... of free energy that governs whether or not a phase transformation is possible, and then the kinetic considerations that determine the rate at which transformations take place. The chapter also describes important solid-state transformations such as spinodal decomposition and martensitic transformation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220193
EISBN: 978-1-62708-259-4
... austenite decomposes during conventional heat treatments largely defines the final result, from the microstructural aspect. Phase transformations during austenite decomposition happen via nucleation and growth. The nucleation and growth processes that control the formation of ferrite, cementite...
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 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 July 2009
DOI: 10.31399/asm.tb.bcp.t52230117
EISBN: 978-1-62708-298-3
...), when a sudden decomposition occurs to give nitrogen tetroxide and a volatile compound that separates from the gas phase as colorless Be 4 O(NO 3 ) 6 crystals. These crystals are slowly hydrolyzed when added to water. Heating metallic beryllium powder in a gaseous ammonia or nitrogen atmosphere...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290139
EISBN: 978-1-62708-319-5
... Fig. 7.2 Photograph of an injection-molded steel component with blisters due to trapped binder during thermal decomposition. A few of the blisters are identified. Ideal binders consist of a filler phase selected for easy extraction. As the filler phase is removed, pores open to become...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410113
EISBN: 978-1-62708-265-5
... Aaronson H.I. , The Proeutectoid Ferrite and the Proeutectoid Cementite Reactions , Decomposition of Austenite by Diffusional Processes , Zackay V.F. and Aaronson H.I. , Ed., Interscience , New York , 1962 , p 387 – 548 7.6 Wilson E.A. , The γ to α Transformation in Low...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220551
EISBN: 978-1-62708-259-4
... 1C) and shown in Fig. 16.39 .The same changes evidently happen in forgings or rolled products. Figure 16.40 , for instance, shows the decomposition of ferrite in austenite and sigma phase (σ). The morphology of the phases originating from the casting process clearly differentiate them from...
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
..., 2010, p 1353–1390 with an Introduction by H.K.D.H. Bhadeshia, p 1351–1352 6.2 Mehl R.F. , The Physics of Hardenability - The Mechanism and the Rate of the Decomposition of Austenite , in Hardenability of Alloy Steels , ASM , 1939 , p 1 – 65 6.3 Smith G. V. , and Mehl R. F...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290035
EISBN: 978-1-62708-319-5
.... It is the phase first extracted after shaping. Melting temperatures are often in the 50 to 160 °C (120 to 320 °F) range, withfull decomposition by 350 °C (660 °F). Common fillers include paraffin wax, polyacetal, and polyethylene glycol. Low-cost fillers are water, palm oil, peanut oil, or mineral oil; however...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480075
EISBN: 978-1-62708-318-8
.... Thus, heat treatment of titanium alloys normally involves the decomposition or transformation of the high-temperature, body-centered cubic beta phase to precipitate alpha phase in the beta matrix. However, a variety of intermediate phases are possible. To fully understand the principles of heat...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240075
EISBN: 978-1-62708-251-8
... are β, γ, δ, and ε. Fig. 6.20 Copper-zinc phase diagram Similar to the eutectic and peritectic reactions that describe the decomposition of a liquid into a solid solution, the same types of reactions occur in the solid state. These solid-state reactions are termed eutectoid and peritectoid...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060333
EISBN: 978-1-62708-261-7
... to the type of precipitation reaction employed. The cobalt-tungsten and cobalt-molybdenum alloy systems possess a eutectoid decomposition of a low-temperature phase and are therefore amenable to heat treatment. This applies especially to the ternary alloys containing approximately 30% W and 10% Cr, which...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120055
EISBN: 978-1-62708-269-3
... to generate optimum and mechanical properties. Heating an alpha-beta alloy to the solution treating temperature produces a higher ratio of beta phase to alpha phase. This partitioning of phases is maintained by quenching; on subsequent aging, decomposition of the unstable beta phase and of the martensite...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230055
EISBN: 978-1-62708-298-3
... the challenges encountered with each. beryllium electrolytic reduction hydrogen reduction thermal decomposition thermodynamics THE FUNDAMENTAL understanding of beryllium reduction thermodynamics is essential to effectively read and interpret the following chapters on beryllium extraction, chemical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430027
EISBN: 978-1-62708-253-2
... and 550 °C (1020 °F). For hypo- and hypereutectoid steels, a proeutectoid phase (ferrite or cementite) coexists with pearlite. An additional line for proeutectoid transformation is therefore shown in the TTT diagrams. The kinetics of decomposition of austenite and the resultant phases formed in plain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060197
EISBN: 978-1-62708-261-7
... with carbon content below the eutectoid composition Hypereutectoid steels with carbon content above the eutectoid composition As noted, martensite is a metastable structure that forms during rapid cooling of austenite. Unlike the isothermal decomposition of phase constituents by diffusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780105
EISBN: 978-1-62708-281-5
..., and solids ( Ref 12 – 15 ). In principle, a small amount of material is dynamically oscillated over a fixed arc or amplitude. Response to this deformation is continuously monitored, and the data is reduced to the in-phase (elastic or storage) and out-of-phase (viscous or loss) components...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220273
EISBN: 978-1-62708-259-4
..., and nitrocarburizing. It describes the primary objectives of each treatment along with processing sequences, process parameters, and related phase transformations. The chapter contains more than 100 images, including time-temperature diagrams, transformation curves, data plots, and detailed micro- and macrographs...