Additive Manufacturing of Cobalt-Based Dental Alloys: Analysis of Microstructure and Physicomechanical Properties

Table 2

Tensile properties of alloys in comparison to standards requirements.

	Young’s modulus E (GPa)	Yield strength RP0.2 (MPa)	Elongation at failure At (%)	Ultimate tensile strength Rm (MPa)	Additional information
AB Co-Cr-Mo range at 0°, 30°, 60°, and 90° in the current study	98.38–112.11	674–783	5.7–14.8	923–1102	Recommended heat treatment for dental parts is 800°C for 20–25 min
HT Co-Cr-Mo range at 0°, 30°, 60°, and 90° in the current study	105.67–164.54	757–1002	8.3–16.7	1012–1262
AB Co-Cr-Mo data from the manufacturer as per ASTM E8 [25]		850 ± 100	10 ± 2	1200 ± 100	Not provided; manufacturer's density is ≈100% in AB and HT conditions; HV5 after heat treatment is 500 ± 20
HT Co-Cr-Mo data from the manufacturer as per ASTM E8 [25]		900 ± 100	15 ± 2	1260 ± 100
AB Co-Cr-W range at 0°, 30°, 60°, and 90° in the current study	138.55–183.44	755–965	10.4–24.3	1188–1263	Recommended heat treatment for dental parts is slow heating (400°C/h) up to 1150°C, followed by a dwell time of 1 h, and then furnace cooling to 300°C
HT Co-Cr-W range at 0°, 30°, 60°, and 90° in the current study	186.96–216.32	651–669	15–18	1108–1162
HT Co-Cr-W data range (0°, 45°, and 90°) from the manufacturer [15]	230	792–835	8–11	1136–1200	Manufacturer-provided density at all orientations is 8.6 g/cm^3
ISO 22674:2016 [16]	150	500	2		Not provided