Microstructure of Co-Cr Alloy Products with Three-Dimensional Geometry Fabricated by Laser Beam Sintering
Microstructure of Co-Cr Alloy Products with Three-Dimensional Geometry Fabricated by Laser Beam Sintering
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DOI：
10.4028/www.scientific.net/msf.783-786.1349
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
A. Serizawa;Tomoki Tanaka;T. Nakano
中科院分区：
文献类型：
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作者：
A. Serizawa;Tomoki Tanaka;T. Nakano
开发与骨骼非常相似的植入材料必须是减少机械失配的内在方法。骨骼表达了基于微观结构适应的机械特性的各向异性，该微观结构适应归因于与体内应力分布相对应的磷灰石 c 轴方向。因此，通过激光束烧结技术对植入材料的微观结构进行控制，旨在改善其机械性能。基于设计模型，通过激光束烧结成功制备了具有三维几何形状的Co-Cr合金产品。晶粒呈现出细长的树枝状形态，并在激光束烧结过程中沿构建方向排列。晶体织构的开发负责沿着构建方向的宏观热流，而不是穿过结构的宏观热流。因此，涉及晶粒形态和晶体织构形成的微观结构通过激光束烧结技术进行各向异性控制。用于生物医学应用的具有三维几何形状的钴铬合金结构中的定向微观结构可以各向异性地改变机械性能。
The development of the implant material which works much like bone must be an intrinsic approach to reduce the mechanical mismatch. Bone expresses the anisotropy of the mechanical characteristics based on the microstructual adaptation attributed to the apatite c-axis orientation corresponding to in vivo stress distribution. Therefore, the control of microstructure of implant material was performed by laser beam sintering technique aiming at the modification of mechanical property. The Co-Cr alloy products with three-dimensional geometry were successfully fabricated by laser beam sintering based on the design model. The grain showed an elongated dendritic morphology and aligned along the build direction during laser beam sintering. The crystallographic texture was developed responsible for the macroscopic heat flow along the build direction rather than the macroscopic one through the structures. Thus, the microstructure involving the grain morphology and crystallographic texture formation was anisotropically controlled by laser beam sintering technique. The mechanical properties could be modified anisotropically by the oriented microstructure in the Co-Cr alloy structures with three-dimensional geometry for the biomedical applications.