Effect of deformation inhomogeneity on the microstructure and mechanical properties of large-scale rib–web component of titanium alloy under local loading forming

In the present paper, the effect of deformation inhomogeneity on the microstructure and mechanical properties of large-scale rib–web component of TA15 titanium alloy under near-β local loading forming was investigated. It is found that four different microstructures can be produced under near-β loca...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2010-08, Vol.527 (21), p.5391-5399
Main Authors: Fan, X.G., Yang, H., Sun, Z.C., Zhang, D.W.
Format: Article
Language:English
Subjects:
Applied sciences
Deformation
Deformation inhomogeneity
Elasticity. Plasticity
Exact sciences and technology
Forming
Grain size
Inhomogeneity
Local loading
Mechanical properties
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Microstructure
Phases
Strain
TA15 titanium alloy
Titanium base alloys
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Summary:In the present paper, the effect of deformation inhomogeneity on the microstructure and mechanical properties of large-scale rib–web component of TA15 titanium alloy under near-β local loading forming was investigated. It is found that four different microstructures can be produced under near-β local loading forming with the variation of deformation degree and thermal processing path: (primary α phases + clustered lamellar α phases + transformed β matrix) produced by small deformation; (primary α phases + disordered lamellar α phases + aggregated transformed β matrix) produced by large deformation in the first-loading step; (primary α phases + partly globularized second α phases + transformed β matrix) produced by moderate deformation in the second-loading step; (primary α phases + fully globularized second α phases + aggregated transformed β matrix) produced by large deformation in the second-loading step. With the increase of strain, the volume fraction of primary α phases increases, while the grain size increases first and then decreases. The comprehensive mechanical properties under local loading are close to that under integral loading.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2010.05.056