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intermediate phases

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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
... Abstract This chapter explains how the presence of intermediate phases affects the melting behavior of binary alloys and the transformations that occur under different rates of cooling. It begins by examining the phase diagrams of magnesium-lead and copper-zinc, noting some of the complexities...
Image
Published: 01 August 2013
Fig. 8.11 The SiO 2 -Al 2 O 3 phase diagram showing mullite as an intermediate phase More
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
.... The presence of intermediate phases is also described. Finally, a brief section provides some information on ternary phase diagrams. phase diagrams eutectic alloy system aluminum-silicon eutectic system lead-tin eutectic system free energy curves peritectic reactions monotectic reactions solid...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420015
EISBN: 978-1-62708-310-2
... atoms. It discusses the difference between interstitial and substitutional solid solutions and the factors that determine the type of solution that two metals are likely to form. It also addresses the development of intermediate phases, the role of free energy, transformation kinetics, liquid-to-solid...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240041
EISBN: 978-1-62708-251-8
.... It describes the intermediate phases that are formed during solidification between the two extremes of substitutional solid solution on the one hand and intermetallic compound on the other. The chapter concludes with a section on strain aging in low-carbon steels that allows the interstitial atoms to diffuse...
Image
Published: 01 October 2011
Fig. 2.40 Illustration of the lever rule to determine phase compositions at intermediate points along the solidus and liquidus lines. See text. More
Image
Published: 31 December 2020
Fig. 32 Illustration of the lever rule to determine phase compositions at intermediate points along the solidus and liquidus lines (see text) More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230179
EISBN: 978-1-62708-298-3
... Beryllium-Gold (Au-Be) Figure 15.3 . The system has several intermediate phases, none of which have been extensively studied. Three of these phases appear to melt congruently: AuBe, AuBe 3 , and AuBe 5 . Additional phases include Au 4 Be 3 , Au 2 Be with the MoSi 2 structure, and Au 3...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420191
EISBN: 978-1-62708-310-2
..., and explains how to construct tie lines to analyze intermediate compositions and phases. It also discusses the use of three-dimensional temperature-composition diagrams, three- and four-phase equilibrium phase diagrams, and binary and ternary phase diagrams associated with the iron-chromium-nickel alloy system...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480051
EISBN: 978-1-62708-318-8
... stabilizers. The titanium-aluminum phase diagram ( Fig. 3.6 ) is a typical example. Fig. 3.6 The titanium-aluminum phase diagram There exists an intermediate, ordered phase called Ti 3 Al (α 2 ) and ordered TiAl (γ) at higher aluminum content ( Ref 3.6 , 3.7 ). As aluminum is added, these atoms...
Image
Published: 01 December 2000
Fig. 3.10 Schematic of the development of a Widmanstätten structure in an alpha-beta alloy (Ti-6Al-4V) Microstructures achieved at various intermediate temperatures by slowly cooling from above the β transus. Final microstructure consists of plates of α (white) separated by the β phase (dark). More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420339
EISBN: 978-1-62708-310-2
... for nucleation. Solute atoms then diffuse to the clusters from the surrounding matrix and convert some of them to nuclei of a new phase. During the early phases of precipitation, the equilibrium phase does not immediately form, but an intermediate crystal structure related to it grows in close contact...
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...
Image
Published: 01 August 2018
Fig. 9.3 (a) If the matrix and the phase to be nucleated are in equilibrium at T e , according to classic nucleation theory the nucleation barrier will decrease with the undercooling below the equilibrium temperature. (b) As the critical nucleus size decreases along with the nucleation barrier More
Image
Published: 01 August 2005
Fig. 6.4 Sequential stages in diffusion brazing for a parent metal A and filler metal B that enter into a single eutectic reaction and do not form intermediate intermetallic compounds. In stage 1, at the commencement of heating, some interdiffusion occurs until melting commences at composition More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240135
EISBN: 978-1-62708-251-8
... and convert some of them to nuclei of a new phase. During the early phases of precipitation, the equilibrium phase does not immediately form, but an intermediate crystal structure related to it grows in close contact with the solid solution. As long as there tends to be atomic matching, or coherency, between...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240527
EISBN: 978-1-62708-251-8
... the alpha and beta phases and is often used as a solid-solution strengthener in conjunction with aluminum to achieve higher strength without embrittlement. Zirconium forms a continuous solid solution with titanium and increases strength at low and intermediate temperatures. Titanium has a great affinity...
Image
Published: 01 August 2018
Fig. 9.24 Etchants such as LePera and their modifications can selectively color tint phases. In the photographs (here reproduced in grayscale), (a) and (b) F = ferrite, bluish green in the original, here intermediate gray tone; B = bainite (brown, darker gray tone); M-A, white. TRIP steels More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480031
EISBN: 978-1-62708-318-8
... level and is said to be stable. However, some special diagrams do show intermediate and metastable phases. Most phase diagrams involve only two (binary) or three (ternary) components. Compositions in binary systems are frequently shown in both weight and atomic percents, and temperatures are usually...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420303
EISBN: 978-1-62708-310-2
.... Often a superlattice structure is present that is then converted to the martensite product. These alloys all belong to the second category, marking a weak first-order transformation with an intermediate stability of the martensite phase at temperatures above the M s temperature. Alloys used in shape...