Aging properties and microstructures of Ti-B20 titanium alloy
(1.陕西省西安市西安交通大学材料科学与工程学院
2.陕西省西安市西北有色金属研究院
3.Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, China)
2.陕西省西安市西北有色金属研究院
3.Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, China)
Abstract: A new metastable beta titanium alloy of Ti-Al-Mo-V-Cr-Fe-Zr-Sn system was designed and named Ti-B20. In order to investigate the aging properties and microstructures of the new alloy subjected to different solution treatments, the tensile and Vickers hardness tests were carried out and the optical microscope and scanning electron microscope analysis were performed. The results show that the new alloy displays rapid aging response, high age strengthening effect and fine deposition. In addition, beta solution results in ultra high age hardening effect with low tensile ductility, whereas excellent combination of aging strength and ductility can be obtained after solution treated below beta transus temperature.
Key words: beta titanium alloy; Ti-B20; aging treatment; tensile properties; microstructure