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Relationship between Phase Fractions and Mechanical Properties in Heat‐Treated Laser Powder‐Bed Fused Co‐Based Dental Alloys
Author(s) -
Kobylinski Jonas,
Hitzler Leonhard,
Lawitzki Robert,
Krempaszky Christian,
Öchsner Andreas,
Werner Ewald
Publication year - 2020
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.201900156
Subject(s) - electron backscatter diffraction , chemistry , alloy , phase (matter) , diffraction , transmission electron microscopy , tungsten , powder diffraction , electron diffraction , metallurgy , composite material , crystallography , materials science , nanotechnology , optics , microstructure , physics , organic chemistry
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 hexagonal ϵ ‐phase and heat treatment with the formation of the D024‐phase, while partially explaining previously observed differences in Young's moduli.