Development of Ti–6Al–4V sheet with low temperature superplastic properties

A Ti–6Al–4V alloy sheet with a submicrocrystalline structure (grain size of 0.3 μm) was produced by multistep isothermal forging followed by flat rolling at temperatures below 650°C. The sheet showed a very strong basal texture and isotropic properties in the sheet plane. Room temperature yield stre...

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Bibliographic Details
Published inJournal of materials processing technology Vol. 116; no. 2; pp. 265 - 268
Main Authors Salishchev, G.A, Galeyev, R.M, Valiakhmetov, O.R, Safiullin, R.V, Lutfullin, R.Y, Senkov, O.N, Froes, F.H, Kaibyshev, O.A
Format Journal Article
LanguageEnglish
Published Elsevier B.V 24.10.2001
Subjects
Mechanical properties
Microstructure
Superplasticity
Titanium alloy sheet
Mechanical properties
Superplasticity
Microstructure
Titanium alloy sheet
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Summary:A Ti–6Al–4V alloy sheet with a submicrocrystalline structure (grain size of 0.3 μm) was produced by multistep isothermal forging followed by flat rolling at temperatures below 650°C. The sheet showed a very strong basal texture and isotropic properties in the sheet plane. Room temperature yield strength, ultimate tensile strength, and fatigue limit of the sheet were 1.2–1.3 times higher than that of sheet with micron-sized grains. Sheet with the submicrocrystalline structure showed superplastic properties at temperatures 650–750°C. A complex hollow structure was produced from the sheet by diffusion bonding/superplastic forming at temperatures 750–800°C. The structure had high microstructural homogeneity and high quality of diffusion bonding.
ISSN:0924-0136
DOI:10.1016/S0924-0136(01)01037-8