有色金属材料与工程2025，Vol.46Issue(2)：70-75,6.DOI:10.13258/j.cnki.nmme.20240301001
时效处理对Ti-12Nb-2Fe-8Zr合金显微组织和力学性能的影响
Effect of aging treatment on microstructures and mechanical properties of Ti-12Nb-2Fe-8Zr alloys
摘要
Abstract
Ti-12Nb-2Fe-8Zr alloy ingots were prepared by arc melting following by cold rolling,solution treatment,and aging treatment.The phase compositions and microstructures of the alloy were analyzed by X-ray diffractometer and optical microscope,the mechanical properties and Vickers hardness of the alloy were tested using tensile testing and Vickers hardness tester,and the corrosion resistance of the alloy was evaluated using an electrochemical workstation.The results indicate that the solution-treated alloy is composed of a single β phase.With the increase of aging temperature,the phase compositions of the alloy are β,β+ω,and α+β,respectively.The Vickers hardness of the aged alloy is higher than that of the solution-treated one,and the alloy after aging at 300℃has the highest numbers of ω phase and shows the highest Vickers hardness.And then the Vickers hardness decreases with the increase of aging temperature.The elastic modulus of the solution-treated alloy is low and the elongation is high.After aging at 300 and 400℃,the alloy shows brittle fracture.After aging at 450℃,the tensile strength of the alloy reaches 831 MPa with an elongation after fracture of 14%.After aging at 600℃,the tensile strength of the alloy is 703 MPa,and the elongation after fracture is approximately 27%.Except for 400℃aging,alloys under other states all have a wide and stable passivation range,suggesting a good corrosion resistance.关键词
β型钛合金/时效处理/显微组织/力学性能/耐腐蚀性能Key words
β-type titanium alloy/aging treatment/microstructure/mechanical properties/corrosion resistance分类
金属材料引用本文复制引用
李明,刘腾飞,徐焕淋,赵柯帆,孔涵芊,李强..时效处理对Ti-12Nb-2Fe-8Zr合金显微组织和力学性能的影响[J].有色金属材料与工程,2025,46(2):70-75,6.基金项目
上海高性能医疗器械材料工程技术研究中心资助项目(20DZ2255500) （20DZ2255500）
