Fe–Al–Si-Type Iron Aluminides: On the Strengthening by Refractory Metals Borides
The effect of boron addition into Fe–28Al–5Si–X (X = -, 2Mo, or 2Ti) on the structure and high-temperature yield stress was investigated. Generally, the alloying of binary Fe<sub>3</sub>Al-type iron aluminides by silicon significantly improves high-temperature mechanical properties by so...
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2022-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/20/7189 |
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| author | Věra Vodičková Martin Švec Pavel Hanus Šárka Bukovská Petra Pazourková Prokopčáková |
| author_facet | Věra Vodičková Martin Švec Pavel Hanus Šárka Bukovská Petra Pazourková Prokopčáková |
| author_sort | Věra Vodičková |
| collection | DOAJ |
| description | The effect of boron addition into Fe–28Al–5Si–X (X = -, 2Mo, or 2Ti) on the structure and high-temperature yield stress was investigated. Generally, the alloying of binary Fe<sub>3</sub>Al-type iron aluminides by silicon significantly improves high-temperature mechanical properties by solid-solution strengthening. On the other hand, the workability and ductile properties at room or slightly elevated temperatures get worse with the increasing silicon content. Boron alloying together with titanium or molybdenum alloying is one of the ways to improve the workability of this type of alloy and, at the same time, ensure the formation of a sufficient amount of secondary phase particles required for effective strengthening. In this paper, the influence of 1 at. % of boron on high-temperature yield stress is evaluated in response to structural changes and compared with results obtained previously on the same type of alloy (Fe–28Al–5Si–2X, X= -, Mo, or Ti) but without boron alloying. It can be concluded that the network structure of borides of refractory metals formed due to boron alloying works more effectively for alloy hardening at higher temperatures than a mixture of silicides and carbides present in the boron-free alloy of the same composition. |
| first_indexed | 2024-03-09T19:53:09Z |
| format | Article |
| id | doaj.art-6cc5be49f2574bd1bae0bd1435882f7a |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T19:53:09Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-6cc5be49f2574bd1bae0bd1435882f7a2023-11-24T01:03:42ZengMDPI AGMaterials1996-19442022-10-011520718910.3390/ma15207189Fe–Al–Si-Type Iron Aluminides: On the Strengthening by Refractory Metals BoridesVěra Vodičková0Martin Švec1Pavel Hanus2Šárka Bukovská3Petra Pazourková Prokopčáková4Department of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, 46117 Liberec, Czech RepublicDepartment of Technology, Faculty of Mechanical Engineering, Technical University of Liberec, 46117 Liberec, Czech RepublicDepartment of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, 46117 Liberec, Czech RepublicDepartment of Technology, Faculty of Mechanical Engineering, Technical University of Liberec, 46117 Liberec, Czech RepublicDepartment of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, 46117 Liberec, Czech RepublicThe effect of boron addition into Fe–28Al–5Si–X (X = -, 2Mo, or 2Ti) on the structure and high-temperature yield stress was investigated. Generally, the alloying of binary Fe<sub>3</sub>Al-type iron aluminides by silicon significantly improves high-temperature mechanical properties by solid-solution strengthening. On the other hand, the workability and ductile properties at room or slightly elevated temperatures get worse with the increasing silicon content. Boron alloying together with titanium or molybdenum alloying is one of the ways to improve the workability of this type of alloy and, at the same time, ensure the formation of a sufficient amount of secondary phase particles required for effective strengthening. In this paper, the influence of 1 at. % of boron on high-temperature yield stress is evaluated in response to structural changes and compared with results obtained previously on the same type of alloy (Fe–28Al–5Si–2X, X= -, Mo, or Ti) but without boron alloying. It can be concluded that the network structure of borides of refractory metals formed due to boron alloying works more effectively for alloy hardening at higher temperatures than a mixture of silicides and carbides present in the boron-free alloy of the same composition.https://www.mdpi.com/1996-1944/15/20/7189Fe<sub>3</sub>Al-based cast iron aluminidetitaniummolybdenum and boron additiongrain sizeheat treatmenthigh-temperature yield stress |
| spellingShingle | Věra Vodičková Martin Švec Pavel Hanus Šárka Bukovská Petra Pazourková Prokopčáková Fe–Al–Si-Type Iron Aluminides: On the Strengthening by Refractory Metals Borides Materials Fe<sub>3</sub>Al-based cast iron aluminide titanium molybdenum and boron addition grain size heat treatment high-temperature yield stress |
| title | Fe–Al–Si-Type Iron Aluminides: On the Strengthening by Refractory Metals Borides |
| title_full | Fe–Al–Si-Type Iron Aluminides: On the Strengthening by Refractory Metals Borides |
| title_fullStr | Fe–Al–Si-Type Iron Aluminides: On the Strengthening by Refractory Metals Borides |
| title_full_unstemmed | Fe–Al–Si-Type Iron Aluminides: On the Strengthening by Refractory Metals Borides |
| title_short | Fe–Al–Si-Type Iron Aluminides: On the Strengthening by Refractory Metals Borides |
| title_sort | fe al si type iron aluminides on the strengthening by refractory metals borides |
| topic | Fe<sub>3</sub>Al-based cast iron aluminide titanium molybdenum and boron addition grain size heat treatment high-temperature yield stress |
| url | https://www.mdpi.com/1996-1944/15/20/7189 |
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