Enhanced Properties of Iron-Based PM Parts via High-Speed Mixing of Powders

Devin Carns, Cole Bressler, Glenn Rishel, Daudi Waryoba

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publicationAdvances in Powder Metallurgy and Particulate Materials - 2022
Subtitle of host publicationProceedings of the 2022 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2022
PublisherMetal Powder Industries Federation
Pages515-525
Number of pages11
ISBN (Electronic)9781943694365
StatePublished - 2022
Event2022 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2022 - Portland, United States
Duration: Jun 12 2022Jun 15 2022

Publication series

NameAdvances in Powder Metallurgy and Particulate Materials - 2022: Proceedings of the 2022 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2022

Conference

Conference2022 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2022
Country/TerritoryUnited States
CityPortland
Period6/12/226/15/22

All Science Journal Classification (ASJC) codes

  • Materials Chemistry
  • Metals and Alloys
  • Surfaces and Interfaces

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