Savin Adriana, Craus Mihail Liviu, Bruma Alina, Novy František, Malo Sylvie, Chlada Milan, Steigmann Rozina, Vizureanu Petrica, Harnois Christelle, Turchenko Vitalii, Prevorovsky Zdenek
Nondestructive Testing Department, National Institute for Research and Development for Technical Physics, 700050 Iasi, Romania.
Frank Laboratory for Neutron Physics, Joint Institute for Nuclear Research, Dubna 141980, Russia.
Materials (Basel). 2020 Oct 28;13(21):4808. doi: 10.3390/ma13214808.
TiMoZrTaSi alloys appertain to a new generation of metallic biomaterials, labeled high-entropy alloys, that assure both biocompatibility as well as improved mechanical properties required by further medical applications. This paper presents the use of nondestructive evaluation techniques for new type of alloys, TiMoZrTaSi, with x = 0; 0.5; 0.75; 1.0, which were obtained by vacuum melting. In Ti alloys, the addition of Mo improves tensile creep strength, Si improves both the creep and oxidation properties, Zr leads to an α crystalline structure, which increases the mechanical strength and assures a good electrochemical behavior, and Ta is a β stabilizer sustaining the formation of solid β-phases and contributes to tensile strength improvement and Young modulus decreasing. The effects of Si content on the mechanical properties of the studied alloys and the effect of the addition of Ta and Zr under the presence of Si on the evolution of crystallographic structure was studied. The influence of composition on fracture behavior and strength was evaluated using X-ray diffraction, resonant ultrasound spectroscopy (RUS) analyses, SEM with energy dispersive X-ray spectroscopy, and acoustic emission (AE) within compression tests. The β-type TiMoZrTaSi alloys had a good compression strength of over 800 MPa, lower Young modulus (69.11-89.03 GPa) and shear modulus (24.70-31.87 GPa), all offering advantages for use in medical applications.
TiMoZrTaSi合金属于新一代金属生物材料，即所谓的高熵合金，这类合金既能确保生物相容性，又能满足进一步医学应用所需的机械性能提升。本文介绍了对通过真空熔炼获得的x = 0；0.5；0.75；1.0的新型合金TiMoZrTaSi使用无损评估技术的情况。在钛合金中，添加钼可提高拉伸蠕变强度，添加硅可同时改善蠕变和氧化性能，锆可形成α晶体结构，从而提高机械强度并确保良好的电化学性能，而钽是一种β稳定剂，可促进固体β相的形成，并有助于提高拉伸强度和降低杨氏模量。研究了硅含量对所研究合金机械性能的影响，以及在硅存在的情况下添加钽和锆对晶体结构演变的影响。使用X射线衍射、共振超声光谱（RUS）分析、带有能量色散X射线光谱的扫描电子显微镜以及压缩试验中的声发射（AE）来评估成分对断裂行为和强度的影响。β型TiMoZrTaSi合金具有超过800 MPa的良好抗压强度、较低的杨氏模量（69.11 - 89.03 GPa）和剪切模量（24.70 - 31.87 GPa），所有这些都为医学应用提供了优势。
