Microstructural Modification in a Beta Titanium Alloy for Implant Applications

Abstract

A recently developed beta titanium alloy, Ti-29-13, for biomedical applications has been subjected to microstructure examination and tensile test. Band structure is observed both in the as-received and cold-rolled specimens. By EDX in SEM, the band structure is confirmed to originate from the segregation of beta stabilizer. Thermomechanical processings consisting of repeated solution treatment, water quenching and cold-rolling are performed to reduce the segregation. The considerable reduction of the band structure is found in the processed specimen. The elongation at high temperature of the processed specimen is larger than that of the cold-rolled specimen although no difference in the strain rate sensitivity is confirmed between them.

Transition between mild and severe wear in titanium alloys

“…They are also resistant to stress corrosion and hydrogen embrittlement and exhibit good creep resistance up to intermediate temperatures [9]. Thus β-Ti alloys have found applications in the biomedical field, oil and gas production and the automotive industry, as well as the aerospace sector in components such as aircraft fasteners, rivets, turbine blades, engine and nacelle, aircraft sheet metal parts and springs, forgings in airframes, aerospace tankage applications, and hydraulic tubing [10][11][12][13][14].…”

Effect of Swirly Segregation of Mo on Omega Phase Precipitation Behavior and Tensile Property of Ti-12Mo Alloy

“…Meanwhile, Mo is prone to segregation in Ti. Thus, special efforts are needed during melting, casting and forming process to suppress or eliminate segregation of Mo [3]. Recently, we found swirly segregation of Mo in hot caliber rolled Ti-12~18 mass% Mo alloy bars, which resulted in the heterogeneous precipitation of ω phase after isothermal aging.…”

Mechanical Properties and High Temperature Deformation of Beta Titanium Alloys

“…The alloy is a near beta type. The β transus is ~700°C [4]. The mechanical properties are tested in an Instron tensile machine to solution treated sample (ST), where the ST condition is at 1117K for 1.8ks, and to ST plus aging sample (STA), where the STA condition is at 673K for 10.8ks.…”