In this study, the microstructures and mechanical properties of a newly developed β-type Ti–34Nb–25Zr (TNZ) alloy after cold rolling at different reduction ratios and recrystallization annealing were investigated by optical microscopy, XRD, SEM, EBSD, hardness and tensile tests. The tensile strength of the TNZ alloys reached 1071 MPa after cold rolling, which is 1.4 times the tensile strength of the solution-treated alloy. The deformation mechanisms of the TNZ alloys were significantly affected by the cold rolling reduction ratio (CRRR). The dominant deformation mechanisms for the TNZ alloys cold rolled at 20% and 56% CRRR were the formation of kink bands and of stress-induced α” martensite. With increases in CRRR to 76%, the TNZ alloys showed a combination of deformation mechanisms including the formation of shear bands and stress-induced α” martensite, and {332} <113> β mechanical twinning. The TNZ alloy after cold rolling at 86% CRRR followed by annealing exhibited elongation at rupture of 18%, tensile strength of 810 MPa, Young’s modulus of 66 GPa, and toughness of 132 MJ/m³, making it attractive for biomedical applications.

在这项研究中，通过光学显微镜，XRD，SEM，EBSD，硬度和拉伸强度研究了新开发的β型Ti–34Nb–25Zr（TNZ）合金在不同压下率和重结晶退火后的组织和力学性能。测试。冷轧后，TNZ合金的拉伸强度达到1071 MPa，是固溶处理合金的拉伸强度的1.4倍。TNZ合金的变形机理受冷轧压下率（CRRR）的显着影响。在20％和56％的CRRR下冷轧的TNZ合金的主要变形机制是扭结带的形成和应力诱发的α”马氏体的形成。随着CRRR增至76％，TNZ合金表现出多种变形机制，包括剪切带的形成和应力诱导的α”马氏体，以及{332} <113>β机械孪晶。TNZ合金冷轧后的CRRR为86％，随后进行退火，断裂伸长率为18％，拉伸强度为810 MPa，杨氏模量为66 GPa，韧性为132 MJ / m³，使其对生物医学应用具有吸引力。