South China University of Technology

Weiwen Zhang

Chao Yang

Yuanyuan Li

XiaoQiang Li

Yaguang Yao

Shengguan Qu

Weiwen Ye

Fen Wang

Zhiyu Xiao

A preparation method for high-strength and low-modulus β-type Si-containing titanium alloy involves: preparing an alloy component with, in atomic percentage, 60-70% of Ti, 10-20% of Nb, 5-15% of Zr, 1-10% of Ta and 1-5% of Si and using sponge titanium, sponge zirconium, a tantalum-niobium intermediate alloy and silicon as raw materials, and then uniformly smelting the alloy components to obtain a solidified ingot; then, subjecting the resulting ingot to plastic deformation with a deformation temperature of 800-900° C. and a deformation rate of 60-80%, and water-quenching same to room temperature; and finally, heating the resulting test sample to a recrystallization temperature, maintaining the temperature for 1-4 h, and carrying out an annealing treatment and air-cooling same to room temperature to obtain the high-strength and low-modulus β-type Si-containing titanium alloy. The resulting titanium alloy is more suitable for use as a medical implant material.

High-strength and low-modulus β-type Si-containing titanium alloy, preparation method therefor and use thereof

A high-strength dual-scale structure titanium alloy, a preparation method therefor, and an application thereof, belonging to the technical field of alloy processing. The composition system of the titanium alloy is Ti&#x2014;Nb&#x2014;Cu&#x2014;Co&#x2014;Al, the atomic percentage of the various elements being 58&#x2dc;70% Ti, 9&#x2dc;16% Nb, 4&#x2dc;9% Cu, 4&#x2dc;9% Co, and 2&#x2dc;8% Al. The microstructure comprises a dual-scale coexistence of micro-crystal isometric bcc &#x3b2;-Ti and ultra-fine crystal isometric bcc &#x3b2;-Ti, and a dual-scale coexistence of micro-crystal strip fcc CoTiand ultra-fine crystal isometric fcc CoTi, or an ultra-fine crystal strip fcc CoTitwin crystal is distributed along a boundary of a dual-scale substrate, the dual-scale substrate being a nano needle-shaped martensite a' phase dispersed within micro-crystal bcc &#x3b2;-Ti. The mechanical properties of the titanium alloy are significantly improved, and the titanium alloy may be used in fields such as aerospace and aviation, weaponry and sports equipment.

High-strength dual-scale structure titanium alloy, preparation method therefor, and application thereof

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Guangzhou, China

Weiwen Zhang