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phase decomposition

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Published: 01 December 2004
Fig. 8 Phase decomposition for the Fe-30Mo (at.%). (a) Two-dimensional time development. (b) Three-dimensional simulation. Source: Ref 6 More
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005409
EISBN: 978-1-62708-196-2
...Abstract Abstract This article focuses on the modeling of microstructure evolution during thermomechanical processing in the two-phase field for alpha/beta and beta titanium alloys. It also discusses the mechanisms of spheroidization, the coarsening, particle growth, and phase decomposition...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003732
EISBN: 978-1-62708-177-1
...Abstract Abstract Spinodal transformation is a phase-separation reaction that occurs from kinetic behavior. This article discusses the theory of spinodal decomposition, and outlines the methods used in the characterization of spinodal structures in metal matrices. microstructure spinodal...
Book Chapter

Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006229
EISBN: 978-1-62708-163-4
... decomposition has been particularly useful in the production of permanent magnet materials, because the morphologies favor high magnetic coercivities. It also describes the theory of spinodal decomposition with a simple binary phase diagram. alloy phases binary phase diagram chemical composition...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006300
EISBN: 978-1-62708-179-5
...Abstract Abstract This article discusses the stable and metastable three-phase fields in the binary Fe-C phase diagram. It schematically illustrates that austenite decomposition requires accounting for nucleation and growth of ferrite and then nucleation and growth of pearlite in the remaining...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006331
EISBN: 978-1-62708-179-5
... their mechanism of formation by introducing the scalar relation, known as the additive strain decomposition. The main factors influencing casting deformation are volume changes during solidification and cooling, phase transformations, alloy composition, thermal gradients, casting geometry, and mold stability...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003730
EISBN: 978-1-62708-177-1
... fine scale and resistant to microstructural coarsening. Structures in which each phase is closely interconnected can result from spinodal decomposition. These spinodal structures are on the nanometer scale. They are characterized by their high degree of connectivity and often by crystallographic...
Image
Published: 01 December 2004
Fig. 36 Bright-field micrograph of cast U-0.3Mo showing two-phase lamellar structure resulting from eutectoid decomposition of β phase. Etched using procedure 1 in Table 5 . 1500×. Courtesy of M.M. Lappin More
Image
Published: 01 December 2004
Fig. 51 Differential interference contrast (DIC) light micrograph of cast U-6.0Nb showing two-phase lamellar structure resulting from monotectoid decomposition of the α phase. Electropolished with 5% H 3 PO 4 , electroetched using procedure 2 in Table 5 . 1000×. Courtesy of A. Kelly More
Image
Published: 01 December 2004
Fig. 4 Miscibility gap. Region 1: homogenous α is stable. Region 2: homogenous α is metastable, only incoherent phases can nucleate. Region 3: homogeneous α metastable, coherent phases can nucleate. Region 4: homogeneous α unstable, spinodal decomposition occurs. Source: Ref 4 More
Image
Published: 01 January 1996
Fig. 21 Electron micrographs of aged type 308 weld. (a) Aged at 475 ° C for 1000 h, showing mottled structure indicative of spinodal decomposition of the δ-ferrite and extensive G-phase precipitation. (b) Aged at 475 °C for 4950 h, showing M 23 C 6 carbides at austenitic-ferrite interface More
Image
Published: 01 December 2004
Fig. 7 Backscatter scanning electron micrograph of an iron-copper alloy that was rapidly solidified after undergoing liquid-phase spinodal decomposition. Source: Ref 5 More
Image
Published: 01 December 2004
Fig. 1 Two sequences for the formation of a two-phase mixture by diffusion processes. (a) Classical nucleation and growth. (b) Spinodal decomposition. Source: Adapted from Ref 1 , 2 More
Image
Published: 01 December 2004
Fig. 2 Regions of spinodal decomposition and classical nucleation and growth of precipitates. (a) Phase diagram with a miscibility gap. (b) Variation in free energy with composition for the system shown in (a) at temperature T ′. Source: Ref 2 More
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003780
EISBN: 978-1-62708-177-1
... cooling permits the γ phase to decompose to two-phase structures morphologically similar to pearlite in steels. Rapid quenching suppresses these diffusional decomposition modes, resulting in various metastable phases. Fig. 1 Polymorphism and solubilities of alloying elements in uranium. Note...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003739
EISBN: 978-1-62708-177-1
... transformations in nonferrous systems. bainite ferrous metals nonferrous metals surface relief BAINITE describes the resultant microstructure in steels of the decomposition of austenite (γ) into ferrite (α) and cementite (Fe 3 C) in the temperature range above the martensitic transformation...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003013
EISBN: 978-1-62708-200-6
... terephthalate (PET), which accounts for the largest percentage of plastic recycling, high-density polyethylene (HDPE) plastics, the other large-volume plastic recyclate, as well as vinyl resins and polycarbonate resins are described. The life cycle of plastics has four phases: poly formation, part fabrication...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005962
EISBN: 978-1-62708-168-9
... is metastable, the decomposition kinetics are very sluggish even at elevated temperatures. It is a very hard and brittle phase that provides significant strengthening. Bainite Bainite is a microconstituent that forms during decomposition of austenite in some copper steels. It is composed of ferrite...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006319
EISBN: 978-1-62708-179-5
... temperature. This stage is characterized by the presence of the combination of phases when high strength and elongation are desired. For longer holding time, stage 3 involves the decomposition of reacted austenite into ferrite and carbides. As in the case of higher-temperature austempering, the best...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001085
EISBN: 978-1-62708-162-7
... the γ phase to diffusionally decompose, as illustrated in Fig. 5 . The product of such diffusional decomposition is analogous to pearlite in steels and consists of alternating platelets of essentially alloy-free α uranium and alloy-enriched second phases. Such two-phase structures exhibit somewhat...