Irimescu Raluca Elena, Raducanu Doina, Nocivin Anna, Cojocaru Elisabeta Mirela, Cojocaru Vasile Danut, Zarnescu-Ivan Nicoleta
Department of Metallic Materials Processing and Ecometallurgy, University POLITEHNICA of Bucharest, 060042 Bucharest, Romania.
Faculty of Mechanical, Industrial and Maritime Engineering, Ovidius University of Constanța, 900527 Constanța, Romania.
Materials (Basel). 2024 Nov 27;17(23):5828. doi: 10.3390/ma17235828.
The microstructural and mechanical features were investigated for the alloy Ti-36.5Nb-4.5Zr-3Ta-0.16O (wt.%) subjected to thermo-mechanical processing consisting of a series of hot and cold rolling combined with solution treatments with particular parameters. The objective was to find the optimal thermo-mechanical treatment variant to improve the mechanical properties, and namely, to increase the yield tensile strength (YTS) and the ultimate tensile strength (UTS), with a low modulus of elasticity and with an adequate ductility in order to obtain a good biomaterial appropriate for use in hard tissue implants. X-ray diffraction and SEM microscopy served to investigate the microstructural features: the type of formed phases with their morphology, dimensions, and distribution. The experimental alloy presented mainly a β-phase with some α″-Ti martensitic phase in particular stages of the processing scheme. The main mechanical properties were found by applying a tensile test, from which were determined the yield tensile strength [MPa], the ultimate tensile strength [MPa], Young's modulus of elasticity [GPa], and the elongation to fracture (%).
对经过热机械加工的Ti-36.5Nb-4.5Zr-3Ta-0.16O（重量百分比）合金的微观结构和力学特性进行了研究，该热机械加工包括一系列热轧和冷轧，并结合特定参数的固溶处理。目的是找到最佳的热机械处理方案，以改善力学性能，即提高屈服抗拉强度（YTS）和极限抗拉强度（UTS），同时具有低弹性模量和足够的延展性，从而获得一种适用于硬组织植入物的良好生物材料。X射线衍射和扫描电子显微镜用于研究微观结构特征：所形成相的类型及其形态、尺寸和分布。实验合金在加工方案的特定阶段主要呈现β相以及一些α″-Ti马氏体相。通过拉伸试验测定主要力学性能，从中确定屈服抗拉强度[MPa]、极限抗拉强度[MPa]、杨氏弹性模量[GPa]以及断裂伸长率（%）。
