Journal article
A Metallographic Study on the Diffusion Behavior and Microstructural Transformations in Silicon-Containing Powder Metallurgy Steels
Metallography, microstructure, and analysis, v 7(6), pp 650-660
01 Dec 2018
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The choice of alloying method for ferrous powder metallurgy alloys is often dictated by the oxidation potential of the alloying elements used in powder and compact manufacture. Silicon is effective in improving properties of ferrous PM steels; however, if added to the melt prior to atomization, the likelihood of oxidation is high. Alternatively, Si-rich and more complex particulates can be combined with the base powder, i.e., iron or low-alloy steel, with alloying occurring by solid-state diffusion during sintering. The effectiveness of these additives to improve material properties is dependent on their distribution throughout the material volume, as determined by diffusion of each added element. In this study, the distribution of silicon was quantified using energy-dispersive spectroscopy on an iron-based alloy composition. These data were compared with the volume fraction of the various transformation products in cross sections of hardenability samples using both light and electron microscopy. Predictions on the effects of local chemical composition, cooling rate, and microstructure are made.
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Details
- Title
- A Metallographic Study on the Diffusion Behavior and Microstructural Transformations in Silicon-Containing Powder Metallurgy Steels
- Creators
- Thomas F. Murphy - Hoeganaes Corporation, Cinnaminson, USAChristopher T. Schade - Hoeganaes Corporation, Cinnaminson, USAAlan Lawley - Drexel UniversityRoger Doherty - Drexel University
- Publication Details
- Metallography, microstructure, and analysis, v 7(6), pp 650-660
- Publisher
- Springer Nature
- Number of pages
- 11
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]; Materials Science and Engineering
- Web of Science ID
- WOS:000450944700003
- Scopus ID
- 2-s2.0-85056844041
- Other Identifier
- 991019167882804721
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- Web of Science research areas
- Metallurgy & Metallurgical Engineering