Relationship between Phase Fractions and Mechanical Properties in Heat‐Treated Laser Powder‐Bed Fused Co‐Based Dental Alloys

Relationship between Phase Fractions and Mechanical Properties in Heat‐Treated Laser Powder‐Bed Fused Co‐Based Dental Alloys
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热处理激光粉床熔融钴基牙科合金相分数与力学性能的关系

DOI:
10.1002/ijch.201900156
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发表时间:
--
影响因子:
3.2
通讯作者:
Werner
Werner
中科院分区:
化学3区
文献类型:
--
作者:
Kobylinski;Hitzler;Lawitzki;Krempaszky;Öchsner;Werner

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由钴-铬-钨(Co-Cr-W)合金组成的牙科假体的金属增材制造是熔模铸造的替代品。然而,像激光粉末床融合(LPBF)这样的金属增材制造工艺会影响所得材料的弹性常数和机械各向异性。为了研究机械性质不同的试样的相组成与其后处理步骤的关系(例如,热处理以消除应力),目前的研究使用X射线衍射(XRD),电子背散射衍射(EBSD)和透射电子显微镜(TEM)进行相鉴定。我们的研究将Remember星星CL合金的塑性变形与六方晶系α-相的形成以及热处理与D 024-相的形成联系起来,同时部分解释了先前观察到的杨氏模量差异。
Metal additive manufacturing of dental prostheses consisting of cobalt−chromium−tungsten (Co−Cr−W) alloys poses an alternative to investment casting. However, metal additive manufacturing processes like Laser Powder‐Bed Fusion (LPBF) can impact the elastic constants and the mechanical anisotropy of the resulting material. To investigate the phase compositions of mechanically different specimens in dependence of their postprocessing steps (e. g. heat treatment to relieve stress), the current study uses X‐ray Diffraction (XRD), Electron BackScatter Diffraction (EBSD), and Transmission Electron Microscopy (TEM) for phase identification. Our studies connect plastic deformation of Remanium star CL alloy with the formation of the hexagonalϵ‐phase and heat treatment with the formation of the D024‐phase, while partially explaining previously observed differences in Young's moduli.
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