Microstructural Investigation and Impact Strength of Sinter-Hardened PM Steels: Influence of Ni Content and Tempering Temperature
This study analyzed the influence of tempering treatment temperature on the microstructural and mechanical behavior of two different powder metallurgy steels containing 0 wt. % Ni and 4 wt. % Ni. The evolution of the microstructure and the macro- and microhardness of the microstructural constituents...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/12/1940 |
| _version_ | 1797380062074372096 |
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| author | Alessio Suman Annalisa Fortini Ottavia Vezzani Mattia Merlin |
| author_facet | Alessio Suman Annalisa Fortini Ottavia Vezzani Mattia Merlin |
| author_sort | Alessio Suman |
| collection | DOAJ |
| description | This study analyzed the influence of tempering treatment temperature on the microstructural and mechanical behavior of two different powder metallurgy steels containing 0 wt. % Ni and 4 wt. % Ni. The evolution of the microstructure and the macro- and microhardness of the microstructural constituents resulting from tempering treatments conducted on the sinter-hardened materials at temperatures ranging from 160 °C to 300 °C were investigated. The role of the tempering conditions in the impact behavior was assessed using Charpy tests on V-notched and unnotched samples, tempered at 180 °C, 220 °C and 280 °C. The observed macrohardness reduction with increasing tempering temperature was related to martensite transformations. At high tempering temperatures, the remarkable loss in impact energy values was attributed to microfracture modes. The contribution of Ni-rich austenite areas in enhancing impact strength was detected. |
| first_indexed | 2024-03-08T20:32:58Z |
| format | Article |
| id | doaj.art-8e11e7b32ef343fd9b4317c0653c6562 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-08T20:32:58Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-8e11e7b32ef343fd9b4317c0653c65622023-12-22T14:24:36ZengMDPI AGMetals2075-47012023-11-011312194010.3390/met13121940Microstructural Investigation and Impact Strength of Sinter-Hardened PM Steels: Influence of Ni Content and Tempering TemperatureAlessio Suman0Annalisa Fortini1Ottavia Vezzani2Mattia Merlin3Department of Engineering, University of Ferrara, 44122 Ferrara, ItalyDepartment of Engineering, University of Ferrara, 44122 Ferrara, ItalyDepartment of Engineering, University of Ferrara, 44122 Ferrara, ItalyDepartment of Engineering, University of Ferrara, 44122 Ferrara, ItalyThis study analyzed the influence of tempering treatment temperature on the microstructural and mechanical behavior of two different powder metallurgy steels containing 0 wt. % Ni and 4 wt. % Ni. The evolution of the microstructure and the macro- and microhardness of the microstructural constituents resulting from tempering treatments conducted on the sinter-hardened materials at temperatures ranging from 160 °C to 300 °C were investigated. The role of the tempering conditions in the impact behavior was assessed using Charpy tests on V-notched and unnotched samples, tempered at 180 °C, 220 °C and 280 °C. The observed macrohardness reduction with increasing tempering temperature was related to martensite transformations. At high tempering temperatures, the remarkable loss in impact energy values was attributed to microfracture modes. The contribution of Ni-rich austenite areas in enhancing impact strength was detected.https://www.mdpi.com/2075-4701/13/12/1940powder metallurgysteelnickel contentheat treatmentmicrostructureimpact strength |
| spellingShingle | Alessio Suman Annalisa Fortini Ottavia Vezzani Mattia Merlin Microstructural Investigation and Impact Strength of Sinter-Hardened PM Steels: Influence of Ni Content and Tempering Temperature Metals powder metallurgy steel nickel content heat treatment microstructure impact strength |
| title | Microstructural Investigation and Impact Strength of Sinter-Hardened PM Steels: Influence of Ni Content and Tempering Temperature |
| title_full | Microstructural Investigation and Impact Strength of Sinter-Hardened PM Steels: Influence of Ni Content and Tempering Temperature |
| title_fullStr | Microstructural Investigation and Impact Strength of Sinter-Hardened PM Steels: Influence of Ni Content and Tempering Temperature |
| title_full_unstemmed | Microstructural Investigation and Impact Strength of Sinter-Hardened PM Steels: Influence of Ni Content and Tempering Temperature |
| title_short | Microstructural Investigation and Impact Strength of Sinter-Hardened PM Steels: Influence of Ni Content and Tempering Temperature |
| title_sort | microstructural investigation and impact strength of sinter hardened pm steels influence of ni content and tempering temperature |
| topic | powder metallurgy steel nickel content heat treatment microstructure impact strength |
| url | https://www.mdpi.com/2075-4701/13/12/1940 |
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