Influence of grain size and crystallographic texture on mechanical behavior of TIMETAL-LCB in metastable β-condition

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 559; pp. 782 - 789
• Main Authors: Markovsky, P.E., Matviychuk, Yu.V., Bondarchuk, V.I.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01-01-2013; Elsevier
• Subjects: Applied sciences; Cross-disciplinary physics: materials science; rheology; Crystallographic texture; Elasticity. Plasticity; Exact sciences and technology; Materials science; Mechanical properties; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Metastable β-phase; Microstructure; Other heat and thermomechanical treatments; Physics; Tensile testing with different rates; Titanium alloys; Treatment of materials and its effects on microstructure and properties; Mechanical properties; Titanium alloys; Tensile testing with different rates; Metastable β-phase; Crystallographic texture; Microstructure; Grain size; Plastic flow; Metastable phases; Tensile tests; Slip planes; Texture; Titanium base alloys; Size effect; Fine grain structure; Transition element alloys; Strain rate
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2012.09.024

The mechanical behavior of TIMETAL-LCB titanium-based alloy in a metastable β-condition with different β-grain size and crystallographic texture was studied at varying tensile strain rates (3.2×10−5s−1–3.6×10−1s−1) at room temperature. A principal role of crystallographic texture in the mode of plastic flow was established. It was found that the presence of a sharp axial (110)β-texture caused similar mechanical behavior of both fine- and coarse-grained microstructures for all strain rates whereas a random texture in the coarse-grained material led to significant localization of the plastic flow, which became more pronounced at lower strain rates and eventually resulted in cleavage along slip planes and early failure.