Development of New Ti-Mn-Mo Alloys for Use in Biomedical Applications
Development of New Ti-Mn-Mo Alloys for Use in Biomedical Applications
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开发用于生物医学应用的新型 Ti-Mn-Mo 合金
DOI：
10.1002/9781119296126.ch293
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Huihong Liu
中科院分区：
文献类型：
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作者：
Pedro Santos;Mitsuo Niinomi;Ken Cho;Masaaki Nakai;Huihong Liu
钛及其合金由于在机械和生化方面具有优异的生物相容性，是用于植入物的一些标准金属生物材料。然而，商业纯钛（CP-Ti）的机械强度相对较低，而广泛使用的合金，例如Ti-6Al-4V ELI（Ti-64 ELI），会在人体内释放有害金属离子（例如钒），这可能会导致长期的健康问题。由于这些原因，开发新合金是必要的。在之前的研究中，锰因其更好的细胞相容性和β稳定作用而被用作合金元素。然而，Ti-Mn合金的低断裂伸长率需要改进。因此，添加钼作为第三种合金元素，以促进孪晶的形成并提高 Ti-Mn 合金的延伸率。 Ti-5Mn-3Mo 合金表现出 33% 的高断裂伸长率，这归因于拉伸变形过程中大量的机械孪生，极限拉伸强度 (UTS) 为 916 MPa。另一方面，Ti-6Mn-4Mo 合金的 UTS 为 1123 MPa，断裂伸长率为 10%。就评估参数而言，所研究的 Ti-Mn-Mo 合金比目前可用于生物医学应用的其他合金显示出更合适的值。
Titanium and its alloys are some of the standard metallic biomaterials used for implants due to their excellent biocompatibility in both mechanical and biochemical aspects. However, commercially pure titanium (CP‐Ti) shows comparatively low mechanical strength and widely used alloys, such as Ti‐6Al‐4V ELI (Ti‐64 ELI), can release harmful metallic ions in the human body (such as vanadium), which may cause long‐term health problems. For such reasons, the development of new alloys is necessary. In previous studies, manganese was used as an alloying element due to its better cytocompatibility and beta‐stabilizing effect. However, the low elongation to fracture of Ti‐Mn alloys requires to be improved. For this reason, molybdenum, was added as a third alloying element, to promote the formation of twins and to improve the elongation of Ti‐Mn alloys. The Ti‐5Mn‐3Mo alloy exhibited a high elongation to fracture of 33%, attributed to substantial mechanical twinning during tensile deformation with an ultimate tensile strength (UTS) of 916 MPa. The Ti‐6Mn‐4Mo alloy, on the other hand, exhibited an UTS of 1123 MPa with an acceptable elongation to fracture of 10%. In terms of the evaluated parameters, the Ti‐Mn‐Mo alloys studied show more suitable values than other alloys currently available for biomedical applications.