TY - GEN
T1 - Microstructural Development and Mechanical Properties of Selective Laser Melted Co–Cr–W Dental Alloy
AU - Hitzler, Leonhard
AU - von Kobylinski, Jonas
AU - Lawitzki, Robert
AU - Krempaszky, Christian
AU - Werner, Ewald
N1 - Publisher Copyright:
© 2020, The Minerals, Metals & Materials Society.
PY - 2020
Y1 - 2020
N2 - Dental restorations are a predestined area for additive manufacturing, due to the required fast fabrication, the low quantities, and the freedom in geometrical designs. Past studies revealed that there is a significant difference in the microstructure compared to traditional investment cast restorations, with drastic implications on the material properties. In many instances, these changes are beneficial, i.e. higher mechanical strength and increased ductility, but at a reduced elastic stiffness. The latter is crucial for the type 5 classification and, based on the studies on a selective laser melted Co–Cr–W dental alloy, a post-heat treatment is inevitable to safely exceed the 150 GPa minimum requirement. Heat treatment at 1150 °C caused a recrystallization and a formation of tungsten rich precipitates, surrounded by a tungsten depleted cobalt–chromium matrix. In the heat-treated state, the alloy exhibited semi-isotropic tensile properties with an average Young’s modulus of about 200 GPa, safely meeting the dental type 2 to 5 classifications.
AB - Dental restorations are a predestined area for additive manufacturing, due to the required fast fabrication, the low quantities, and the freedom in geometrical designs. Past studies revealed that there is a significant difference in the microstructure compared to traditional investment cast restorations, with drastic implications on the material properties. In many instances, these changes are beneficial, i.e. higher mechanical strength and increased ductility, but at a reduced elastic stiffness. The latter is crucial for the type 5 classification and, based on the studies on a selective laser melted Co–Cr–W dental alloy, a post-heat treatment is inevitable to safely exceed the 150 GPa minimum requirement. Heat treatment at 1150 °C caused a recrystallization and a formation of tungsten rich precipitates, surrounded by a tungsten depleted cobalt–chromium matrix. In the heat-treated state, the alloy exhibited semi-isotropic tensile properties with an average Young’s modulus of about 200 GPa, safely meeting the dental type 2 to 5 classifications.
KW - Dental application
KW - Elastic stiffness
KW - Precipitations
KW - Recrystallization
KW - Tensile properties
UR - http://www.scopus.com/inward/record.url?scp=85081309004&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-36296-6_18
DO - 10.1007/978-3-030-36296-6_18
M3 - Conference contribution
AN - SCOPUS:85081309004
SN - 9783030362959
T3 - Minerals, Metals and Materials Series
SP - 195
EP - 202
BT - TMS 2020 149th Annual Meeting and Exhibition Supplemental Proceedings
A2 - Peng, Zhiwei
A2 - Hwang, Jiann-Yang
A2 - Downey, Jerome
A2 - Gregurek, Dean
A2 - Zhao, Baojun
A2 - Yucel, Onuralp
A2 - Keskinkilic, Ender
A2 - Jiang, Tao
A2 - White, Jesse
A2 - Mahmoud, Morsi
PB - Springer
T2 - 149th Annual Meeting and Exhibition of the Minerals, Metals and Materials Society, TMS 2020
Y2 - 23 February 2020 through 27 February 2020
ER -