| Author | Search for: Gauthier, Maxime1; Search for: Katz, Aurélien1; Search for: Maison, Antoine; Search for: Cojocaru, Cristian V.1; Search for: Bernier, Fabrice1 |
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| Affiliation | - National Research Council of Canada. Automotive and Surface Transportation
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| Format | Text, Address |
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| Conference | XXVII International Materials Research Congress, August 19-24, 2018, Cancun, Mexico |
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| Subject | stainless steel; foam; precipitation hardening |
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| Abstract | This paper presents the results of a study on the impact of precipitation hardening on the mechanical properties of 17-4PH stainless steel open-cell foams produced using a powder-metallurgy-based process patented by the National Research Council Canada (NRC). Pre-alloyed powder was used to manufacture stainless steel (SS) foams with either medium or high porosity by changing the nature of the organic binder used to process the porous materials. Some of these were kept in the as-sintered state, while others were submitted to the H900 precipitation hardening treatment frequently prescribed for 17-4PH stainless steels. Metallurgical and physical characterization was carried out on the resulting materials, along with mechanical testing at the micro (nano-indentation) and macro (compressive testing) scales. It was found that the Medium-Porosity (MP) and High-Porosity (HP) foams had very different morphologies, the HP foams having a delicate porous structure featuring thin sintered walls with many openings (a.k.a. windows) between the main cells, while the MP foams exhibited much thicker walls with few windows connecting the larger pores. As expected from these foam morphologies, the mechanical properties of MP foams were much higher than those of the more porous and delicate HP materials. For both foam types, the average mechanical properties were improved by the H900 treatment. However, a large scatter was observed on compressive properties versus relative porosity of individual specimens for both HP and MP foams, whose origin should be further investigated. |
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| Publication date | 2018 |
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| Publisher | Materials Research Society |
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| In | |
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| Language | English |
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| Peer reviewed | No |
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| NRC number | NRC-AST-001 |
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| NPARC number | 23004654 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 8034078a-5262-4a29-9880-397c979dd275 |
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| Record created | 2018-12-04 |
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| Record modified | 2020-05-26 |
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