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首页> 美国卫生研究院文献>Materials >Microstructures and Mechanical Properties of Laser-Sintered Commercially Pure Ti and Ti-6Al-4V Alloy for Dental Applications
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Microstructures and Mechanical Properties of Laser-Sintered Commercially Pure Ti and Ti-6Al-4V Alloy for Dental Applications

机译：牙科用商业烧结纯钛和Ti-6Al-4V合金的显微组织和力学性能

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摘要

To apply laser-sintered titanium (Ti) materials to dental prostheses with a three-dimensional structure such as partial dentures, we examined the microstructures and mechanical properties of commercially pure (CP) Ti grade (G) 2 annealed after laser sintering and laser-sintered (as-built) Ti-6Al-4V alloy. The tensile and fatigue properties of CP Ti G 2 annealed at 700 °C for 2 h after laser sintering were close to those of wrought CP Ti G 2 annealed at the same temperature after hot forging. The ultimate tensile strengths (σ ) of 90°- and 0°-direction-built CP Ti G 2 rods after laser sintering 10 times were 553 and 576 MPa and the total elongations (TE) of these rods were 26% and 28%, respectively. The fatigue strengths (σ ) at 10 cycles of the 90°- and 0°-direction-built CP Ti G 2 rods after laser sintering 10 times were ~320 and ~365 MPa, respectively. The ratio σ /σ was in the range of 0.5–0.7. The changes in the chemical composition and mechanical properties after laser sintering 10 times were negligible. The fatigue strength of the laser-sintered Ti-6Al-4V alloy was ~600 MPa, which was close to that of wrought Ti-6Al-4V alloy. These findings indicate that the laser-sintered CP Ti and Ti-6Al-4V alloy can also be applied in dental prostheses similarly to laser-sintered Co–Cr–Mo alloy. In particular, it was clarified that laser sintering using CP Ti G 4 powder is useful for dental prostheses.
机译：要将激光烧结的钛（Ti）材料应用于具有三维结构（例如局部义齿）的假牙，我们研究了经过激光烧结和激光烧结的商用纯（CP）Ti级（G）2退火后的微观结构和力学性能。烧结（竣工）Ti-6Al-4V合金。激光烧结后在700°C下退火2 h的CP Ti G 2的拉伸和疲劳性能与热锻后在相同温度下退火的变形CP Ti G 2的拉伸和疲劳性能接近。 90°和0°方向制造的CP Ti G 2棒经激光烧结10次后的极限抗拉强度（σ）为553和576 MPa，这些棒的总伸长率（TE）为26％和28％，分别。 90°和0°方向制造的CP Ti G 2棒在激光烧结10次后的10个循环中的疲劳强度（σ）分别为〜320和〜365 MPa。比率σ/σ在0.5-0.7的范围内。激光烧结10次后化学成分和机械性能的变化可以忽略不计。激光烧结的Ti-6Al-4V合金的疲劳强度约为600 MPa，接近锻制的Ti-6Al-4V合金的疲劳强度。这些发现表明，激光烧结的CP Ti和Ti-6Al-4V合金也可以与激光烧结的Co-Cr-Mo合金类似地应用于假牙。特别地，已经阐明了使用CP Ti G 4粉末的激光烧结对于牙齿修复是有用的。

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