A Study On The Mechanical Properties Of Medical Titanium Alloy Ti13Nb13Zr

Titanium and titanium alloys have excellent characteristics such as high strength,light weight,non-toxic and non-magnetic properties,excellent corrosion resistance and good biocompatibility.They are the most suitable metal materials for medical use.Titanium and titanium alloys are widely used.In the medical field of implants,dentistry,medical devices and human orthopedics.However,with the continuous advancement of society,people’s requirements for medical titanium alloys are constantly higher.Ti13Nb13 Zr is a new generation of medical titanium alloy,which is composed of living elements and does not contain harmful elements such as Al.It has lower elastic modulus,better biocompatibility and higher strength,replacing the second generation alloy.It has become an inevitable trend.Therefore,further understanding of the mechanical properties of titanium alloys has a very high value.In order to study the mechanical properties of the third generation medical titanium alloy Ti13Nb13 Zr,the following work was carried out:(1)Ti13Nb13Zr was tested by micro-nano mechanics using nanoindentation,and the mechanical properties of the material at micro-nano scale were analyzed.The experimental results show that the contact stiffness,elastic modulus and hardness of the material at the micro-nano scale provide important experimental data for the service of Ti13Nb13 Zr in human body.(2)In order to determine the creep behavior of Ti13Nb13 Zr implanted in the human body,the creep behavior of Ti13Nb13 Zr was measured by nanoindenter at room temperature.The effect of these two factors on the experimental results was determined by changing the loading rate and maximum load of the experiment.The results show that the experimental results are independent of the loading rate and maximum load and are only related to the nature of the material itself.Finally,the creep stress index of the material is between 28.98 and 34.66,which provides experimental data and theoretical reference for the creep behavior of Ti13Nb13 Zr implanted in human body.(3)After Ti13Nb13 Zr alloy is used in human body,the material will inevitably be subjected to low-speed impact.In order to grasp the mechanical properties of the material under low-speed impact,the drop weight test was used to measure the energy absorption and damage of Ti13Nb13 Zr under low-speed impact conditions.The effects of these two factors on the experimental results were determined by using different shapes of punches and changing the impact energy.The results show that the geometry of the punch has a great influence on the displacement and damage of the punch.The peak load of the cylindrical punch is the largest,the displacement of the punch of the conical punch is the largest,and the damage area is the smallest.When the impact energy of the cylindrical punch is 30 J,the material is not destroyed,and 73% of the energy is absorbed by the material.In this paper,the mechanical properties,creep properties and mechanical properties of the third-generation medical alloy Ti13Nb13 Zr alloy at the micro-nano scale were compared with those of the most widely used medical titanium alloy Ti6A14 V.The resistance of Ti13Nb13 Zr creep capacity is about 4 times that of Ti6A14 V,and the energy absorption rate is basically the same.Ti13Nb13 Zr has better mechanical properties in these two aspects,indicating that the prospect of Ti13Nb13 Zr is very good.At the same time,the work of this paper can provide important experimental and theoretical basis for the design of the third-generation medical titanium alloy Ti13Nb13 Zr alloy and the development of the material itself.It can provide protection for accidents and expand the application prospect of materials.At the same time,it is also used for other medical titanium alloys.Development and development provide new methods and ideas.