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首页> 外文期刊>Advances in Mechanical Engineering >Microstructural and Mechanical Characterization of a Custom-Built Implant Manufactured in Titanium Alloy by Direct Metal Laser Sintering
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Microstructural and Mechanical Characterization of a Custom-Built Implant Manufactured in Titanium Alloy by Direct Metal Laser Sintering

机译：直接金属激光烧结在钛合金中制造的定制植入物的组织和力学特性

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摘要

Custom-built implants manufacture has always presented difficulties which result in high cost and complex fabrication, mainly due to patients' anatomical differences. The solution has been to produce prostheses with different sizes and use the one that best suits each patient. Additive manufacturing technology, incorporated into the medical field in the late 80's, has made it possible to obtain solid biomodels facilitating surgical procedures and reducing risks. Furthermore, this technology has been used to produce implants especially designed for a particular patient, with sizes, shapes, and mechanical properties optimized, for different areas of medicine such as craniomaxillofacial surgery. In this work, the microstructural and mechanical properties of Ti6Al4V samples produced by direct metal laser sintering (DMLS) are studied. The microstructural and mechanical characterizations have been made by optical and scanning electron microscopy, X-ray diffraction, and microhardness and tensile tests. Samples produced by DMLS have a microstructure constituted by hexagonal alpha ' martensite with acicular morphology. An average microhardness of 370 HV was obtained and the tensile tests showed ultimate strength of 1172 MPa, yield strength of 957 MPa, and elongation at rupture of 11%.
机译：定制植入物的制造始终存在困难，这主要是由于患者的解剖学差异而导致高成本和复杂的制造。解决方案是生产尺寸不同的假体，并使用最适合每个患者的假体。增材制造技术已在80年代后期纳入医学领域，它使得获得能够促进手术程序并降低风险的固体生物模型成为可能。此外，该技术已用于生产专为特定患者设计的植入物，其尺寸，形状和机械性能均经过优化，适用于诸如颅颌面外科等不同医学领域。在这项工作中，研究了直接金属激光烧结（DMLS）生产的Ti6Al4V样品的显微组织和力学性能。通过光学和扫描电子显微镜，X射线衍射以及显微硬度和拉伸试验对显微组织和机械特性进行了表征。 DMLS生产的样品具有由具有针状形态的六角形α'马氏体构成的微观结构。获得的平均显微硬度为370 HV，拉伸试验的极限强度为1172 MPa，屈服强度为957 MPa，断裂伸长率为11％。

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