Oriented face-centered cubic to hexagonal close-packed martensitic transition, grain morphology, and mechanical properties of Co-Cr alloy fabricated by selective laser melting

Xiang, Yan; Jiang, Ruodan; Li, Wen; Lin, Hong

doi:10.1016/j.prosdent.2020.07.036

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…However, the mean value of elongation ε (0.33 ± 0.1) on Sysma Mysint100 does not meet EN ISO 22674:2016 standards and is not comparable with mean values obtained with conventional production procedures ( Table 4 ). On the other hand, other values of all mechanical properties of the materials produced on three different machines from Table 2 are comparable to the obtained mechanical properties in [ 3 , 30 , 31 , 35 , 36 , 37 ] ( Table 4 ). Therefore, comparing the mechanical properties of specimens prepared by different machines, the 3D Systems DMP Dental 100 can be compared to the values presented in Table 4 .…”

Section: Discussionsupporting

confidence: 81%

“…Based on the literature [3,30,31,[35][36][37], the mean values and standard deviations of the mechanical properties of milled (CNC), cast, and SLM-produced Co-Cr alloys, are presented in Table 4, along with EN ISO 22674 criteria. 2 with the mean values from the literature in Table 4, depending on the production technology, it can be concluded that the SLM technology can produce Co-Cr dental alloys that meet the EN ISO 22674:2016 type 5 criteria (R p0.2 ≥ 500 MPa and ε ≥ 2%).…”

Section: Discussionmentioning

confidence: 99%

“…Based on the literature [ 3 , 30 , 31 , 35 , 36 , 37 ], the mean values and standard deviations of the mechanical properties of milled (CNC), cast, and SLM-produced Co-Cr alloys, are presented in Table 4 , along with EN ISO 22674 criteria.…”

Section: Discussionmentioning

confidence: 99%

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Additively Manufactured Commercial Co-Cr Dental Alloys: Comparison of Microstructure and Mechanical Properties

et al. 2021

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Laser-powder bed fusion (LPBF) is one of the preferred techniques for producing Co-Cr 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, three-point 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.

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