| Summary: | 碩士 === 大葉大學 === 醫療器材設計與材料碩士學位學程 === 106 === Ti-6Al-4V alloy belongs to α+β biphase type titanium alloy and has high strength, low density, corrosion resistance and biocompatibility. Therefore, Ti-6Al-4V alloy is widely used in medical, industrial, aerospace, people's livelihood and so on. Ti-6Al-4V has better toughness, better mechanical strength, and fatigue resistance than pure titanium. It does not react with surrounding tissue and does not react with blood. It has gradually replaced other metal materials in recent years. As the preferred biomedical material for orthopaedic implants, high-strength Ti-6Al-4V alloys are widely used for implants with larger forces.
The human body Yang type coefficient 15~30 GPa, the Young's coefficient 98Gpa~110Gpa of the titanium alloy and the stress binding effect when the bones are combined. Therefore, in this experiment, Ti-6Al-4V die castings were used as experimental materials, and then porous patterns were designed on metal materials to reduce the Young's modulus. Avoid the stress shielding effect when titanium alloy implants and bones are combined.
The solution heat of the experiment is 1000°C; the cooling methods are air cooling and water quenching respectively, and then 500°C~800°C as the temperature condition of aging heat treatment. Find out the best mechanical properties and process parameters.
Therefore, the purpose of the experiment is to perform heat treatment to investigate the Young's modulus and mechanical properties, find the best, and improve the stress shielding effect. In order to understand the mechanical properties, test specimens were made with Ti-6Al-4V, and subjected to heat treatment, tensile test, metallographic observation, hardness test, etc., and the optimum heat treatment conditions and hole design of Ti-6Al-4V were used. The described experiment was performed using the best process parameters to produce the best Ti-6Al-4V spine fusion cage to meet the application of human tissue .
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