Ti-Nb-Fe-Sn合金显微组织和力学性能的研究  

Study on the microstructure and mechanical properties of Ti-Nb-Fe-Sn alloys

作　　者：程超 赵虎 刘旭燕[2] CHENG Chao;ZHAO Hu;LIU Xuyan(Shanghai Xinguang biopharmaceutical Co.,Ltd.,Shanghai 201318,China;School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海心光生物医药有限公司,上海201318 [2]上海理工大学机械工程学院,上海200093

出　　处：《有色金属材料与工程》2023年第5期9-15,共7页Nonferrous Metal Materials and Engineering

基　　金：上海高性能医疗器械材料工程技术研究中心资助项目(20DZ2255500)。

摘　　要：研究了Ti-(22,24,26,28)Nb-2Fe-4Sn合金的显微组织和力学性能。使用真空非自耗电弧熔炼炉制备合金铸锭,均匀化处理后对合金铸锭进行冷轧和固溶处理。使用X射线衍射仪和光学显微镜对其物相和微观组织进行分析。通过拉伸试验测定了合金的力学性能,使用扫描电子显微镜观察了拉伸样品断口形貌。结果表明,Ti-(22,24,26,28)Nb-2Fe-4Sn合金具有单一β相。Nb的加入使合金的β相稳定性提高,合金的变形机制由孪晶变形转变为位错滑移变形,孪晶诱导塑性变形使得合金具有较高的伸长率。所有合金拉伸断口呈韧性断裂特征。Ti-26Nb-2Fe-4Sn合金的弹性模量为59 GPa,伸长率为19%,抗拉强度为621 MPa,具有良好的生物医学应用前景。The microstructure and mechanical properties of Ti-(22,24,26,28)Nb-2Fe-4Sn alloys were studied.The alloy ingots were prepared by a vacuum non-consumable arc-melting furnace.After homogenization,the alloy ingots were subjected to cold rolling and solid solution treatment.The phase and microstructure were analyzed by X-ray diffractometer and optical microscope.The mechanical properties were measured by tensile test,and the fracture morphologies of the tensile samples were observed by scanning electron microscope.The results show that Ti-(22,24,26,28)Nb-2Fe-4Sn alloys have a singleβphase.The addition of Nb stabilizes theβphase in the Ti-Nb-Fe-Sn alloys.The deformation mechanism of alloys is changed from twinning to slip.Twinning-induced plasticity results in a higher elongation of alloy.All alloy tensile fractures show ductile fracture characteristics.The elasticity modulus of Ti-26Nb-2Fe-4Sn alloy is about 59 GPa,the elongation is 19%,the tensile strength is 621 MPa,and it has a good biomedical application prospect.

关 键 词：Β型钛合金 力学性能 显微组织 生物医用材料 

分 类 号：TG146.23[一般工业技术—材料科学与工程]