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metastable-beta alloys

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480141
EISBN: 978-1-62708-318-8
.... An explanation of the terms used in describing titanium microstructures, along with illustrative micrographs, is presented. Metastable, or nonequilibrium, phases that occur in titanium alloys are discussed in more detail in Chapter 4, “Principles of Beta Transformation and Heat Treatment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480075
EISBN: 978-1-62708-318-8
... with these processes, explaining how and why they occur and how they are typically controlled. It makes extensive use of phase diagrams and cooling curves to illustrate the effects of alloying and quenching on beta-to-alpha transformations and the conditions that produce metastable phases. It also examines several...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
...) and metastable beta alloys in this section. Also described are weld defects (macro-segregation, microsegregation, and solidification-defect formation) and the effects of postweld heat treatment on welded titanium structures. In many alloy systems, weldability is determined by the capability...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610209
EISBN: 978-1-62708-303-4
..., <10%; α + β, 10 to 25%; and β, >25%. The fracture toughness/strength relationship maps for different titanium alloys are shown in Fig. 38 . Metastable beta alloys possess the highest combination of strength and toughness. This arises from a large volume fraction of beta-phase and fine aged-alpha...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.9781627082693
EISBN: 978-1-62708-269-3
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120013
EISBN: 978-1-62708-269-3
.... A near-beta or beta alloy composition is one that tends to retain, indefinitely at lower temperatures, the beta phase formed at high temperatures. However, the beta that forms on initial cooling to room temperature is metastable. Dependent on chemistry, it may precipitate secondary phases during heat...
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
... alloys are classified according to the amount of alpha and beta retained in their structures at room temperature. Classifications include commercially pure, alpha and near-alpha, alpha-beta, and metastable beta. The commercially pure and alpha alloys have essentially all-alpha microstructures. Beta...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120033
EISBN: 978-1-62708-269-3
.../ near -β/ metastable β alloys Ti-8Al-8V-2Fe-3Al 775 1425 C/B 705–980 1300–1800 Ti-10V-2Fe-3Al 805 1480 C 705–785 1300–1450 B 815–870 1500–1600 Ti-13V-11Cr-3Al 675 1250 C/B 650–955 1200–1750 Ti-15V-3Cr-3Al-3Sn 770 1415 C/B 705–925 1300–1700 Beta C (Ti-3Al-8V-6Cr...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480051
EISBN: 978-1-62708-318-8
... Compositional relationship of several terminal titanium alloys by increasing or decreasing the percentage of alpha and beta phases of an alloy Finally, on the extreme right are the metastable beta alloys that retain 100% beta at room temperature. The upper portion of the figure illustrates how...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120085
EISBN: 978-1-62708-269-3
... of the product during processing. Solution-treated, age-hardenable alloys of titanium are sensitive to time-temperature reactions, and the temperatures of descaling media, which can induce a subsequent aging effect and change mechanical properties. For example, metastable beta or beta alloys, 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
.... The metastable beta alloys usually do not require solution treatment. Final hot working, followed by air cooling, leaves these alloys in a condition comparable to a solution-treated state. In some instances, however, solution treating at 790 °C (1450 °F) has produced better uniformity of properties after aging...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480113
EISBN: 978-1-62708-318-8
..., and ductility as well as creep, fatigue strength, and fatigue crack growth rate. It also discusses the influence of other titanium phases and the properties of titanium-based intermetallic compounds, metal-matrix composites, and shape-memory alloys. alloy composition alpha titanium alloys alpha-beta...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310351
EISBN: 978-1-62708-326-3
... from the fine dispersion of second-phase precipitates that form in a metastable (quenched) single-phase alloy Two-phase nonferrous alloys (such as titanium-base alloys and high-zinc copper-zinc alloys), where strength can be obtained with a mixture of two phases of comparable quantity (unlike...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120005
EISBN: 978-1-62708-269-3
... extensively in aerospace, missile and space, and other high-performance applications have included Ti-6V-2Sn-2Zr-2Cr-2Mo + Si, Ti-6Al-6V-2Sn, Ti-10V-2Fe-3A1, and Ti-13V-11Cr-3A1. The latter alloy also is called BI2OVCA. It was the first of a line of metastable beta alloys, although it is now considered...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480225
EISBN: 978-1-62708-318-8
... the beta transus. Three alloys used primarily in the beta-forged condition are Ti-13V-11Cr-3Al for sheet, plate, and billet for structurals; Ti-17 (Ti-5Al-2Sn-2Zr-4Mo-4Cr) for jet engines; and Ti-10V-2Al-3V for airframe structural parts. Ti-13V-11Cr-3Al is a metastable beta alloy, which is quite...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550223
EISBN: 978-1-62708-307-2
... for binary titanium alloys. Source: Ref 5.2 Titanium alloys are classified according to the amount of alpha and beta retained in their structures at room temperature. Classifications include commercially pure, alpha and near-alpha, alpha-beta, and metastable beta. The commercially pure and alpha...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480161
EISBN: 978-1-62708-318-8
... forgeable alloy High strength, good fracture resistance Ti-15V-3Al-3Sn-3Cr Near-beta alloy High-strength, cold-formable alloy Beta C (Ti-3Al-8V-6Cr-4Zr-4Mo) Metastable beta alloy High strength and fatigue resistance Beta III (Ti-11.5Mo-6Zr-4.5Sn) Metastable beta alloy High strength, good...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480265
EISBN: 978-1-62708-318-8
... to prevent joint and base metal embrittlement. The effect of the brazing thermal cycle on base metal properties is also important. For best results, brazing temperature should not exceed the beta transus. Otherwise, ductility and toughness of the base metal can be impaired. Also, if the brazing alloy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120001
EISBN: 978-1-62708-269-3
... to as metastable beta. These are alloys that retain an essentially beta structure on cooling to room temperature. Titanium aluminides are intermetallic compounds of titanium and aluminum (with one or more additional alloy element provided as well). Commercially pure titanium and the alpha and near-alpha...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230179
EISBN: 978-1-62708-298-3
... is approximately 3 at.% or 14 wt%. The maximum solid solubility of beryllium in cobalt is approximately 12 at.% or 3 wt%. There are two congruent melting phases: The beta phase, with a cesium chloride-ordered cubic structure, melts at 1420 °C (2590 °F), and the gamma phase melts at 1400 °C (2550 °F). Gamma...