首页|Understanding variant selection and texture in additively manufactured red-gold alloys
Understanding variant selection and texture in additively manufactured red-gold alloys
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NSTL
Elsevier
? 2021Printing gold alloys parts is a challenge due to the high reflectivity and thermal conductivity of these materials. Recent studies show an improvement in printing gold using the Laser Powder Bed Fusion (L-PBF) process; however, the impact of the A1→L10 phase transformation on printed red-gold alloy has not been studied. In this work, 3D printed red-gold samples with different post-processing conditions have been heat-treated at 250 °C to investigate the effect of the sample stress states on variant selection, by Electron Backscatter Diffraction. Synchrotron X-ray diffraction experiments reveal the presence of a non-negligible amount of tetragonal phase in the as-build red-gold samples. The use of an intermediate heat treatment at 600 °C to eliminate small domains of tetragonal phase formed during the manufacturing process demonstrates that the crystallographic textures following heat treatment are highly dependent on the stress-state during the early stage of the phase transformation.
Electron backscatter diffraction (EBSD)Laser powder bed fusion (L-PBF)Red-gold alloyVariant selectionX-ray diffraction
Jhabvala J.、Van Petegem S.、Kalentics N.、Boillat E.、Loge R.E.、Ghasemi-Tabasi H.、Larcher M.N.D.、Cayron C.
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Thermomechanical Metallurgy Laboratory (LMTM)-PX Group Chair école Polytechnique Fédérale de Lausanne (EPFL)
Photons for Engineering and Manufacturing Paul Scherrer Institute
NSTL
Elsevier
