Naslov
Additively manufactured commercial Co-Cr dental alloys: comparison of microstructure and mechanical properties
(Additively manufactured commercial CO-CR dental alloys: comparison of microstructure and mechanical properties)

Autori
Viderščak, Dalibor ; Schauperl, Zdravko ; Šolić, Sanja ; Ćatić, Amir ; Godec, Matjaž ; Kocijan, Aleksandra ; Paulin, Irena ; Donik, Črtomir

Izvornik
Materials (1996-1944) 14 (2021), 23; 7350, 10

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Co-Cr dental alloys ; LPBF ; microstructure ; mechanical properties ; SEM ; EBSD

Sažetak
Laser-powder bed fusion (LPBF) is one of the preferred techniques for producing CoCr metal structures for dental prosthodontic appliances. However, there is generally insufficient information about material properties related to the production process and parameters. This study was conducted on samples produced from three different commercially available Co-Cr dental alloys produced on three different LPBF machines. Identically prepared samples were used for tensile, threepoint bending, and toughness tests. Light microscopy (LM), scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD) analyses of microstructure were performed after testing. Differences were observed in microstructures, which reflected statistically significant differences in mechanical properties (one-way analysis of variance (ANOVA) and Scheffé post hoc test (α = 0.05)). The material produced on the 3D Systems DMP Dental 100 had 24 times greater elongation ε than the material produced on the Sysma MySint 100 device and the EOS M100 machine. On the other hand, the material produced on the EOS M100 had significantly higher hardness (HV0.2) than the other two produced materials. However, the microstructure of the Sysma specimens with its morphology deviates considerably from the studied group. LPBF-prepared Co-Cr dental alloys demonstrated significant differences in their microstructures and, consequently, mechanical properties.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija, Strojarstvo, Temeljne tehničke znanosti, Dentalna medicina, Interdisciplinarne biotehničke znanosti

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