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alpha and near-alpha titanium alloys

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120159
EISBN: 978-1-62708-269-3
... Abstract This appendix provides datasheets describing the chemical composition, processing characteristics, mechanical and fabrication properties, and heat treating of alpha and near-alpha titanium alloys. Datasheets are provided for the following alloys: Ti-3Al-2.5V (ASTM Grade 9, UNS R56320...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120139
EISBN: 978-1-62708-269-3
.... Table A.2 Alpha and near-alpha titanium alloys Alloy, UNS number, common names General description Applications Common alpha and near-alpha alloys Ti-3Al-2.5V, UNS R56320, tubing alloy, ASTM grade 9, Half 6-4 Ti-3Al-2.5V has excellent cold formability and 20 to 50% higher strength...
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
..., and grades of commercially pure titanium and alpha and near-alpha, alpha-beta, and beta titanium alloys. It describes primary and secondary fabrication processes, including melting, forging, forming, heat treating, casting, machining, and joining as well as powder metallurgy and direct metal deposition...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120001
EISBN: 978-1-62708-269-3
... for the generally accepted four classes of titanium alloys: alpha, near-alpha, alpha-beta, and beta. Figure 1.4 schematically shows some effects of alloying elements on structure for representative alloys and classes or subclasses of titanium alloys. The figure also indicates the effects that structures have...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550299
EISBN: 978-1-62708-307-2
..., and isothermal, closed-die forging. Two major techniques for rolling of sheet are conventional hot pack rolling and bare isothermal rolling. For the near-gamma titanium aluminide alloys, rolling is usually most easily conducted in the alpha-plus-gamma phase field at temperatures approximately 40 to 150 °C...
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
... of notch tensile strength and fracture toughness were consistently higher for the beta-forged material. Fig. 5.6 Comparison of mechanical properties achieved in near-alpha-, alpha-beta-, and beta-forged titanium alloys The beta-forged alloys tend to show a transformed beta or acicular...
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 near-alpha titanium alloys can be stress relieved and annealed, but high strength cannot be developed in these alloys by any type of heat treatment. The beta alloys, on the other hand, contain metastable beta that allows strengthening during aging as the retained beta decomposes. The beta...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120013
EISBN: 978-1-62708-269-3
.... Fig. 3.1 Some U.S. alloy compositions relative to a pseudobinary titanium phase diagram An alpha alloy (so described because its chemistry favors alpha phase) does not normally form beta phase on heating. A near-alpha (sometimes called “superalpha”) alloy forms only limited beta phase...
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 response of titanium and titanium alloys to heat treatment depends on the composition of the metal. The basic alpha, near-alpha, alpha-beta, or beta alloys have heat treatment responses attuned to the microstructure (phases and distribution) that can be produced in a given alloy. In simpler terms, heat...
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 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130541
EISBN: 978-1-62708-284-6
... 0.1–3 Pure Selenium (Se) 3 2 Pure Sulfur (S) 5 3 Pure Technetium (Tc) 5–8 3–5 Pure Plutonium (Pu) 8 5 Permanent magnet iron alloy 8 5 Pure Manganese (Mn) 6–11 3–7 Beta and near beta titanium 8–11 4–7 Pure Bismuth (Bi) 6–12 3–7 Alpha beta titanium 8–10 5–6...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480051
EISBN: 978-1-62708-318-8
... titanium alloys. The alloy classes are described by the crystal structures that exist at or near room temperature. They are alpha (α), alpha-beta (α-β), and beta (β) alloys. Each class of alloys has its own distinctive properties. In addition to these three classes of terminal alloys, intermetallic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480141
EISBN: 978-1-62708-318-8
... from an alpha treatment at a formation temperature (well below the alpha transus), which is a function of cooling rate and alloy composition. Typical cooling rates range 10 to 50 °C (18 to 90 °F) per minute. The near-lamellar (NL) microstructure is formed upon annealing at a temperature just below...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480113
EISBN: 978-1-62708-318-8
.... The formation of hydrides varies depending on the alloy and the temperature. In applications requiring high ductility and toughness at the expense of maximum strength, extralow interstitial titanium alloys should be specified. Hot working the material at temperatures near or above the beta transus temperature...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120095
EISBN: 978-1-62708-269-3
... , and that Chapter should be used as a reference when reading the current Chapter. As a reminder, titanium alloys are grouped into classes: alpha, near alpha, alpha-beta (alpha plus beta), and beta. This grouping reflects the customary room-temperature presence of the alpha phase (hexagonal close-packed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480095
EISBN: 978-1-62708-318-8
... and near-alpha alloys, require higher stress-relief temperatures and longer times than alloys having poorer creep strength, such as alpha-beta alloys. Table 5.7 shows stress-relief temperatures used for various titanium alloys. Because the alpha-beta and beta-titanium alloys are heat treatable, stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480075
EISBN: 978-1-62708-318-8
... to martensite. It can occur in alloys with beta stabilization near or below β c but with an M f below room temperature. The volume fraction formed depends on alloy chemical composition, but it is usually a low volume fraction and therefore has little effect on as-quenched mechanical properties. An alloy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610209
EISBN: 978-1-62708-303-4
...), beta is more ductile and is preferable in increasing the fracture toughness of titanium alloys. The three broad classes of titanium alloys are near-alpha, alpha + beta, and beta alloys, grouped according to the levels of alpha or beta stabilizing elements. Typically, beta content by volume is near-α...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480225
EISBN: 978-1-62708-318-8
... presses operate at approximately 10 to 40 mm/mm/min (10 to 40 in./in./min) Lower forge energy requirements Ability to produce a near-net-shape geometry Titanium alloys are isothermally forged using the same equipment and procedures used to produce other alloys, particularly consolidated powder...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480161
EISBN: 978-1-62708-318-8
... alloys have been used in casting, from the rich, high-strength beta and near-beta alloys, to high-temperature near-alpha alloys, to corrosion-resistant lean alloys, to commercially pure titanium, and the relatively brittle titanium aluminides. Most cast components are made of commercially pure (CP...