Hydrogen Interactions and Embrittlement in Metastable Beta Ti-3Al-8V-6Cr-4Mo-4Zr

Metastable beta titanium alloys have been known to have numerous advantages such as cold formability, high strength, good fracture resistance, deep hardenability, and cost effectiveness. Very high strength is obtainable by precipitation of the hexagonal alpha phase in a bcc beta matrix in these alloys. Precipitation hardening in the metastable beta alloys may also result from the formation of transition phases such as omega phase. Ti-15-3 (Ti-15V- 3Cr-3Al-3Sn) has been developed recently by TIMET and USAF for low cost sheet metal applications. The purpose of the present study was to examine the aging characteristics in this alloy.The composition of the as-received material is: 14.7 V, 3.14 Cr, 3.05 Al, 2.26 Sn, and 0.145 Fe. The beta transus temperature as determined by optical metallographic method was about 770°C. Specimen coupons were prepared from a mill-annealed 1.2 mm thick sheet, and solution treated at 827°C for 2 hr in argon, then water quenched. Aging was also done in argon at temperatures ranging from 316 to 616°C for various times.

Download Full-text

CARTECH Ti-3Al-8V-6Cr-4Mo-4Zr (BETA C)

Alloy Digest ◽

10.31399/asm.ad.ti0172 ◽

2020 ◽

Vol 69 (11) ◽

Keyword(s):

Corrosion Resistance ◽

Minimum Weight ◽

High Strength ◽

Heat Treating ◽

Beta Alloy ◽

Heat Treated ◽

Technology Corporation ◽

Carpenter Technology Corporation ◽

Metastable Beta ◽

Good Workability

Abstract CarTech Ti-3Al-8V-6Cr-4Mo-4Zr, also known as Ti-3-8-6-4-4 and Beta C, is a metastable beta alloy used in the solution heat treated or solution heat treated and aged condition. It is appropriate for applications where very high strength, minimum weight, and corrosion resistance are important. Ti-3Al-8V-6Cr-4Mo-4Zr has gained in popularity among beta alloys because it is easier to melt and process, exhibiting low segregation, good workability, and good heat-treating properties. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-172. Producer or source: Carpenter Technology Corporation.

Download Full-text

ALLVAC Ti-15Mo

Alloy Digest ◽

10.31399/asm.ad.ti0136 ◽

2005 ◽

Vol 54 (7) ◽

Keyword(s):

Vacuum Arc ◽

Unique Combination ◽

Vacuum Arc Remelting ◽

Beta Alloy ◽

Metastable Beta

Abstract Allvac Ti-15Mo is a metastable beta alloy melted in a vacuum arc remelting (VAR) furnace to minimize segregation. The alloy has a unique combination of properties and is used in the medical, chemical, and aerospace industries. This datasheet provides information on composition. Filing Code: TI-136. Producer or source: Allvac, an Allegheny Technologies Company.

Download Full-text

Microstructure Evolution and Microhardness Analysis of Metastable Beta Titanium Alloy Ti-15V-3Cr-3Al-3Sn Consolidated Using Equal-Channel Angular Pressing from Machining Chips

Journal of Materials Engineering and Performance ◽

10.1007/s11665-020-04913-8 ◽

2020 ◽

Vol 29 (6) ◽

pp. 4142-4153

Author(s):

Q. Shi ◽

Y. Y. Tse ◽

R. L. Higginson

Keyword(s):

Titanium Alloy ◽

Equal Channel Angular Pressing ◽

Microstructure Evolution ◽

Beta Titanium Alloy ◽

Angular Pressing ◽

Beta Titanium ◽

Metastable Beta

Download Full-text

Effect of Cold Machining Process on the Property and Microstructure of Ti-5Mo-5V-8Cr-3Al Strip

Materials Science Forum ◽

10.4028/www.scientific.net/msf.788.134 ◽

2014 ◽

Vol 788 ◽

pp. 134-137 ◽

Cited By ~ 1

Author(s):

Pei Tong Ni ◽

Li Peng Zhou ◽

Bao Liang Bai ◽

Ming Chen Han ◽

Mei Sheng Zhu

Keyword(s):

Solution Treatment ◽

Aging Treatment ◽

High Strength ◽

Machining Process ◽

Beta Titanium Alloy ◽

Cold Forming ◽

Corrugated Shell ◽

Beta Titanium ◽

Gas Quenching ◽

Metastable Beta

Metastable beta titanium alloy Ti-5Mo-5V-8Cr-3Al, with high-strength, favorite ductility and outstanding capacity of cold forming and welding, has been found the applications in sheet metal component, pressure vessel, corrugated shell and cold heading rivet at the temperature lower than 350°C. In the present paper, the effect of cold machining deformation rate and heat treatment process on the properties and microstructures of Ti-5Mo-5V-8Cr-3Al strip were investigated. The results revealed that excellent comprehensive mechanical properties could be achieved with the alloy by reasonable cold machining process and with solution treatment at 800°C followed by gas quenching. Upon a solution and aging treatment at 480°C, the alloy performed favorite plasticity and high ultimate tensile strength of 1250MPa.

Download Full-text