TY - GEN
T1 - Enhanced Properties of Iron-Based PM Parts via High-Speed Mixing of Powders
AU - Carns, Devin
AU - Bressler, Cole
AU - Rishel, Glenn
AU - Waryoba, Daudi
N1 - Publisher Copyright:
© 2022 Advances in Powder Metallurgy and Particulate Materials
PY - 2022
Y1 - 2022
N2 - This study was performed to investigate the effects of high-speed mixing of iron powders compared to conventional tumbler mixed powders. Flow properties, microstructure, and mechanical properties of sintered parts, and other characteristics such as apparent density and porosity are some of the properties investigated. The powders used in the study were F-008, FC-0208, and FD-0205. High speed mixing was done at 2,500 rpm for 30 seconds and 19,000 rpm for 30 seconds. After mixing, the powders were compacted to a density of 6.6 g/cm3 and sintered at 1135 °C (2075 °F) in a 90% N2 + 10% H2 atmosphere. Results show that parts made from high-speed mixed powders exhibit better flow properties (about 20% increase) and higher TRS strength (about 9% increment) compared to parts made from conventional mixed powders. This is attributed to 'geometrical hardening' due to particle fragmentation and local deformation at contact areas between particles. This ultimately improves diffusion during sintering. The results of this study suggest that high-speed mixing of powders can be used to improve the properties of typical powder metal parts.
AB - This study was performed to investigate the effects of high-speed mixing of iron powders compared to conventional tumbler mixed powders. Flow properties, microstructure, and mechanical properties of sintered parts, and other characteristics such as apparent density and porosity are some of the properties investigated. The powders used in the study were F-008, FC-0208, and FD-0205. High speed mixing was done at 2,500 rpm for 30 seconds and 19,000 rpm for 30 seconds. After mixing, the powders were compacted to a density of 6.6 g/cm3 and sintered at 1135 °C (2075 °F) in a 90% N2 + 10% H2 atmosphere. Results show that parts made from high-speed mixed powders exhibit better flow properties (about 20% increase) and higher TRS strength (about 9% increment) compared to parts made from conventional mixed powders. This is attributed to 'geometrical hardening' due to particle fragmentation and local deformation at contact areas between particles. This ultimately improves diffusion during sintering. The results of this study suggest that high-speed mixing of powders can be used to improve the properties of typical powder metal parts.
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M3 - Conference contribution
AN - SCOPUS:85184091980
T3 - Advances in Powder Metallurgy and Particulate Materials - 2022: Proceedings of the 2022 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2022
SP - 515
EP - 525
BT - Advances in Powder Metallurgy and Particulate Materials - 2022
PB - Metal Powder Industries Federation
T2 - 2022 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2022
Y2 - 12 June 2022 through 15 June 2022
ER -