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首页> 外文期刊>International Journal of Natural and Engineering SciencesbElectronic resource >Determination of Fatigue Life of Titanium Alloys Used As a Locking Screw in Medical Applications
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Determination of Fatigue Life of Titanium Alloys Used As a Locking Screw in Medical Applications

机译：测定医疗应用中用作锁定螺钉的钛合金的疲劳寿命

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Titanium alloys are used in a wide range of applications including implant materials for the surgery and dental applications because of their outstanding mechanical properties such as superior strength, high corrosion resistance, lower modulus of elasticity and excellent biocompatibility. Ti6Al4V ELI is a typical Ti alloy accepted as an alternative metallic material for failed bone fractures because of good machinability and excellent mechanical properties, especially when direct contact with tissue or bone is required. During its service, most of the metallic implants are subjected to cyclic loading inside the human body which leads to the possibility of fatigue fracture. An evaluation of the fracture characteristics of fatigued implant materials can offer information about the fatigue life and the residual fracture resistance of these materials. In this study; Ti6Al4V ELI Grade 23 material medical screw test samples were designed and tested in accordance with the ASTM Bending Fatigue Test Procedure using 2,5 kN capacity test machine at room atmospheric conditions. Initial loading conditions determined based 75, 50, and 25 % of the bending strength found in accordance with the static 3P bending tests. The data generated from a series of tests were compiled and the results presented as a Fatigue Strength-the Number of Cycles (S/N) diagrams. For validation of the experimental studies; fatigue behaviors of screws were also analyzed with Ansys software using Finite Element Analysis (FEA) under dynamic loads.
机译：钛合金具有出色的机械性能，例如强度高，耐腐蚀，弹性模量低和生物相容性优异，因此广泛用于包括外科手术和牙科应用的植入材料在内的各种应用。 Ti6Al4V ELI是一种典型的Ti合金，由于具有良好的机械加工性和出色的机械性能，特别是在需要与组织或骨骼直接接触的情况下，被公认为是骨折失败的替代金属材料。在使用过程中，大多数金属植入物会在人体内部承受循环载荷，这可能导致疲劳断裂。评估疲劳植入材料的断裂特性可以提供有关这些材料的疲劳寿命和残余断裂抗力的信息。在这个研究中; Ti6Al4V ELI 23级材料医用螺钉测试样品是根据ASTM弯曲疲劳测试程序设计的，并在室温下使用2.5 kN容量的测试机进行测试。根据静态3P弯曲测试得出的弯曲强度的75％，50％和25％确定初始载荷条件。汇编了一系列测试生成的数据，结果显示为疲劳强度-循环数（S / N）图。用于验证实验研究;还使用有限元分析（FEA）通过Ansys软件在动态载荷下分析了螺钉的疲劳行为。

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