Characteristics of Fatigue Crack Propagation and Fatigue Strength of .ALPHA.+.BETA. Titanium Alloy for Superplasticity. (Effect of Anisotropy and Microstructure).

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.

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Coarsening Behavior of an Alpha-Beta Titanium Alloy

10.21236/ada428814 ◽

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

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Intergranular fracture of heat-treated weldments in a high-strength alpha-beta titanium alloy

Scripta Metallurgica ◽

10.1016/0036-9748(79)90328-4 ◽

1979 ◽

Vol 13 (10) ◽

pp. 959-964 ◽

Cited By ~ 14

Author(s):

W.A. Baeslack ◽

Yashwant Mahajan

Keyword(s):

Titanium Alloy ◽

Intergranular Fracture ◽

High Strength ◽

Beta Titanium Alloy ◽

Beta Titanium ◽

Heat Treated ◽

Alpha Beta

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Fatigue Strength Assessment of a Structure Considering Corrosion Wastage and Corrosion Fatigue

Volume 3: Structures, Safety, and Reliability ◽

10.1115/omae2018-78188 ◽

2018 ◽

Author(s):

Norio Yamamoto ◽

Tomohiro Sugimoto ◽

Kinya Ishibashi

Keyword(s):

Fatigue Crack ◽

Fatigue Strength ◽

Crack Propagation ◽

Fatigue Crack Propagation ◽

Corrosion Fatigue ◽

Life Assessment ◽

Actual State ◽

Corrosive Environment ◽

Corrosion Fatigue Crack ◽

Long Life

It is known that the fatigue strength decreases in corrosive environment and many experiments were carried out to comprehend the decrease in fatigue strength in corrosive environment. In order to comprehend the actual state, a cycle speed of fatigue test loads should correspond to a wave frequency. Therefore, an experiment in the long life region is practically difficult, then the corrosion fatigue data available for the life assessment of the structure is quite limited. In this study, the fatigue strength of the welded joints in long life service was evaluated according to the calculations of corrosion fatigue crack propagation subjected to the random loadings which followed an exponential distribution. In the crack propagation calculations, the progress of corrosion wastage from the plate surface and the resultant stress increase were considered simultaneously. In the high stress and the short life region, the decrease in fatigue strength due to the accelerated crack propagation in corrosive environment was dominant because the progress of corrosion wastage was little. On the other hand, in the low stress and the long life region, the decrease in fatigue strength became dull as longer the fatigue life because the corrosion fatigue crack propagation was suppressed by the corrosion wastage, but after that the fatigue strength showed the precipitous decrease due to the increase in stress resulted by the progress of corrosion wastage.

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