Tailoring Selective Laser Melting Process Parameters for NiTi Implants

被引：213

作者：

Bormann, Therese ^{[1
,2
]}

Schumacher, Ralf ^{[1
]}

Mueller, Bert ^{[2
]}

Mertmann, Matthias ^{[3
]}

de Wild, Michael ^{[1
]}

机构：

[1] Univ Appl Sci NW Switzerland, Inst Med & Analyt Technol, CH-4132 Muttenz, Switzerland

[2] Univ Basel, Biomat Sci Ctr, Univ Basel Hosp, CH-4031 Basel, Switzerland

[3] Memry GmbH, D-79576 Weil Am Rhein, Germany

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2012年 / 21卷 / 12期

关键词：

biomaterials; graded properties; mechanical testing; metallography; NiTi; pseudoelasticity; selective laser melting; TITANIUM; MANUFACTURE; ALLOYS; FOAMS;

D O I：

10.1007/s11665-012-0318-9

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Complex-shaped NiTi constructions become more and more essential for biomedical applications especially for dental or cranio-maxillofacial implants. The additive manufacturing method of selective laser melting allows realizing complex-shaped elements with predefined porosity and three-dimensional micro-architecture directly out of the design data. We demonstrate that the intentional modification of the applied energy during the SLM-process allows tailoring the transformation temperatures of NiTi entities within the entire construction. Differential scanning calorimetry, x-ray diffraction, and metallographic analysis were employed for the thermal and structural characterizations. In particular, the phase transformation temperatures, the related crystallographic phases, and the formed microstructures of SLM constructions were determined for a series of SLM-processing parameters. The SLM-NiTi exhibits pseudoelastic behavior. In this manner, the properties of NiTi implants can be tailored to build smart implants with pre-defined micro-architecture and advanced performance.

引用

页码：2519 / 2524

页数：6

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