Effects of Ta on Microstructure and Mechanical Property of Ti-Zr-Cu-Pd-Ta Alloys

Abstract

The effects of Ta on microstructure and mechanical property of Ti-Zr-Cu-Pd-Ta alloys without toxic element were investigated in this paper. The results revealed that with increasing Ta content, the glass-forming ability of examined alloys decreased. Nano-crystalline composites were obtained with 1% and 3% Ta addition. Higher strength and distinct plastic deformation comparing with Ti-Zr-Cu-Pd base alloy were achieved in 1% Ta-containing alloys due to the nano-particles existing in the glassy matrix which inhibit the deformation of shear bands. Dendrite enriched with Ta was also observed in the 5% Ta-containing alloy by SEM. No plastic deformation was observed for 3% and 5% Tacontaining alloys with the high volume fractions of crystallization over 50%.

Thermal stability of irradiation-induced metastable lattice structures in NiTi intermetallic compound

“…around 43°. Such broad XRD peaks have been observed typically for metallic amorphous materials [12][13][14]. The present result, therefore, implies that the amorphous state is induced in NiTi by the irradiation.…”

Effect of Minor Addition Ta on the Thermal Stability and Corrosion Resistance of Ti-Zr-Cu-Pd Bulk Metallic Glasses

“…The mechanical properties of (Ti 40 Zr 10 Cu 36 Pd 14 ) 100-x Ta x (x＝1, 3 or 5)as-cast specimens with a diameter of 2 mm was studied [15]. In the stress-strain curves, the Ti 40 Zr 10 Cu 36 Pd 14 base alloy is mainly subjected to elastic deformation before fracture.…”

“…With further increasing the content of Ta to 3 and 5%, no plastic deformation is obtained. It was proposed [15] that the distinct plastic strain of the 1% Ta-containing alloy originates from the obstacle of nanoparticles in glassy matrix. In this case, the as-cast (Ti 40 Zr 10 Cu 36 Pd 14 ) 99 Ta 1 rod with a diameter of 3 mm is also shown in Fig.…”

New Cu-Free Ti-Based Composites with Residual Amorphous Matrix

“…Elimination of nickel and beryllium was achieved in 2007 with the Ti-Zr-Cu-Pd family of compositions, based on a (Ti-Zr) 50 (Cu-Pd) 50 concept and subsequent small additions of elements like Sn, Si, Ta, Nb, Co, or In [ 17 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. This new approach is an important accomplishment allowing fabrication of components with critical dimensions up to 10 mm, simultaneously with elimination of nickel, which is one of the most allergenic elements, as well as beryllium, with its high cytotoxic effects.…”