Omega phase formation in RMI (38-6-44) beta titanium alloy

1974 ◽  
Vol 9 (3) ◽  
pp. 487-490 ◽  
Author(s):  
Gordon A. Sargent ◽  
H. Huang ◽  
R. J. De Angelis
Keyword(s):  
Titanium Alloy ◽  
Phase Formation ◽  
Omega Phase ◽  
Beta Titanium Alloy ◽  
Beta Titanium

Autocatalytic Nucleation of Omega Phase in a Beta-Titanium Alloy

1976 ◽  
Vol 34 ◽  
pp. 604-605
Author(s):  
T. J. Headley
Keyword(s):  
Titanium Alloy ◽  
Electron Microscope ◽  
Omega Phase ◽  
General Study ◽  
Beta Titanium Alloy ◽  
Ω Phase ◽  
Solution Treated ◽  
Beta Titanium ◽  
Considerable Controversy ◽  
Titanium Zirconium

The well-known ββ+ω transformation has been observed in many b.c.c.- stabilized titanium, zirconium, and hafnium alloys(1,2). Although considerable controversy still exists regarding the exact mechanism(s) for formation of the ω phase, recent studies suggest that both the athermal and isothermal types form by the same mechanism and that they may therefore be considered equivalent products(3,4).The present observations are concerned with the formation of isothermal w in the B-titanium alloy RMI(38-6-44) [composition in wt.%: 3.4 Al, 8.3 V, 5.8 Cr, 3.9 Zr, 4.2 Mo, balance Ti] and form a part of a more general study of the aging characteristics of this alloy(5). The alloy was solution treated at 927°C, air-quenched, aged at appropriate temperatures, and examined in a Phillips EM 200 electron microscope. TEM failed to reveal the presence of athermal m in the solution treated and quenched material. Isothermal OJ formed during aging at 250° and 300°C, but it was not stable at temperatures of 350°C and above.

Decomposition of the metastable beta titanium alloy Ti-15-3

1983 ◽  
Vol 41 ◽  
pp. 264-265
Author(s):  
Y. L. Chen ◽  
S. Fujlshiro
Keyword(s):  
Low Cost ◽  
High Strength ◽  
Alpha Phase ◽  
Thick Sheet ◽  
Omega Phase ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Beta Matrix ◽  
Metastable Beta ◽  
Very High

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.

ALLVAC 6Al-6V-2Sn

Alloy Digest ◽  
1991 ◽  
Vol 40 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Stabilizing Effect ◽  
Alpha Beta

Abstract ALLVAC 6A1-6V-2Sn is a highly beta stabilized alpha + beta titanium alloy, a modification of the 6 A1-4V system. Added vanadium plus copper and iron produce the stabilizing effect. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-98. Producer or source: Teledyne Allvac.

UNS R54620

Alloy Digest ◽  
1987 ◽  
Vol 36 (7) ◽  
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Time Use ◽  
Temperature Stability ◽  
High Strength ◽  
Heat Treating ◽  
High Temperature Stability ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Long Time

Abstract UNS No. R54620 is an alpha-beta titanium alloy. It has an excellent combination of tensile strength, creep strength, toughness and high-temperature stability that makes it suitable for service to 1050 F. It is recommended for use where high strength is required. It has outstanding advantages for long-time use at temperatures to 800 F. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ti-86. Producer or source: Titanium alloy mills.

Coarsening Behavior of an Alpha-Beta Titanium Alloy

2004 ◽  
Author(s):  
S. L. Semiatin ◽  
B. C. Kirby ◽  
G. A. Salishchev
Keyword(s):  
Titanium Alloy ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Coarsening Behavior ◽  
Alpha Beta

scholarly journals Improving the mechanical strength of ternary beta titanium alloy (Ti-Ta-Sn) foams, using a bimodal microstructure

2020 ◽  
Vol 195 ◽  
pp. 108945
Author(s):  
C. Aguilar ◽  
T. Aguirre ◽  
C. Martínez ◽  
F. De Barbieri ◽  
F. San Martín ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Mechanical Strength ◽  
Bimodal Microstructure ◽  
Beta Titanium Alloy ◽  
Beta Titanium
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