Effect of Higher Silicon Content and Heat Treatment on Structure Evolution and High-Temperature Behaviour of Fe-28Al-15Si-2Mo Alloy
This paper describes the structure and properties of cast Fe3Al-based alloy doped with 15 at. % of silicon and 2 at. % of molybdenum. The higher content of silicon is useful for the enhancement of high-temperature mechanical properties or corrosion resistance of iron aluminides but deteriorates thei...
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| Veröffentlicht in: | Materials 2021-06, Vol.14 (11), p.3031 |
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| creator | Švec, Martin Vodičková, Věra Hanus, Pavel Pazourková Prokopčáková, Petra Čamek, Libor Moravec, Jaromír |
| description | This paper describes the structure and properties of cast Fe3Al-based alloy doped with 15 at. % of silicon and 2 at. % of molybdenum. The higher content of silicon is useful for the enhancement of high-temperature mechanical properties or corrosion resistance of iron aluminides but deteriorates their workability due to increased brittleness. It was found that the presence of both alloying elements leads to an increase of values of the high-temperature yield stress in compression. The heat treatment (annealing at 800 °C for 100 h) used for the achievement of phase stability causes the grain coarsening, so the values of the high-temperature yield stress in compression are lower at 600 °C and 700 °C in comparison to values measured for the as-cast state. This stabilization annealing significantly improves the workability/machinability of alloy. Furthermore, the higher silicon content positively affects the values of the thermal expansion coefficient that was found to be lower in the temperature range up to 600 °C compared to alloys with lower content of silicon. |
| doi_str_mv | 10.3390/ma14113031 |
| format | Article |
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The higher content of silicon is useful for the enhancement of high-temperature mechanical properties or corrosion resistance of iron aluminides but deteriorates their workability due to increased brittleness. It was found that the presence of both alloying elements leads to an increase of values of the high-temperature yield stress in compression. The heat treatment (annealing at 800 °C for 100 h) used for the achievement of phase stability causes the grain coarsening, so the values of the high-temperature yield stress in compression are lower at 600 °C and 700 °C in comparison to values measured for the as-cast state. This stabilization annealing significantly improves the workability/machinability of alloy. Furthermore, the higher silicon content positively affects the values of the thermal expansion coefficient that was found to be lower in the temperature range up to 600 °C compared to alloys with lower content of silicon.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma14113031</identifier><identifier>PMID: 34199604</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Additives ; Alloying elements ; Annealing ; Brittleness ; Cooling ; Corrosion resistance ; Ductility ; Ferrous alloys ; Heat treatment ; High temperature ; Investigations ; Iron aluminides ; Machinability ; Mechanical properties ; Oxidation ; Phase stability ; Plasma sintering ; Powder metallurgy ; Silicon ; Solid solutions ; Stainless steel ; Steel alloys ; Temperature ; Thermal expansion ; Workability ; Yield strength ; Yield stress</subject><ispartof>Materials, 2021-06, Vol.14 (11), p.3031</ispartof><rights>2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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Furthermore, the higher silicon content positively affects the values of the thermal expansion coefficient that was found to be lower in the temperature range up to 600 °C compared to alloys with lower content of silicon.</description><subject>Additives</subject><subject>Alloying elements</subject><subject>Annealing</subject><subject>Brittleness</subject><subject>Cooling</subject><subject>Corrosion resistance</subject><subject>Ductility</subject><subject>Ferrous alloys</subject><subject>Heat treatment</subject><subject>High temperature</subject><subject>Investigations</subject><subject>Iron aluminides</subject><subject>Machinability</subject><subject>Mechanical properties</subject><subject>Oxidation</subject><subject>Phase stability</subject><subject>Plasma sintering</subject><subject>Powder metallurgy</subject><subject>Silicon</subject><subject>Solid solutions</subject><subject>Stainless steel</subject><subject>Steel alloys</subject><subject>Temperature</subject><subject>Thermal expansion</subject><subject>Workability</subject><subject>Yield strength</subject><subject>Yield stress</subject><issn>1996-1944</issn><issn>1996-1944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdkU9v3CAQxVHVqonSXPoJkHqpKrkBD7bhUmm72nQjpepht2eE8ThLhM0W45Vy7hcvTqL-4wBo3k8P3gwhbzn7CKDY1WC44BwY8BfknCtVF1wJ8fKv-xm5nKZ7lhcAl6V6Tc5ALCoT5-Tnpu_RJhp6unV3B4x057yzYaTrMCYcEzVjR7doEt3HvA9LKau7FGeb5oh0cwp-Ti7XHslsUuxxOGI0j_JnPJiTC3NcnrjGopQrX_Bq54rya6Ar78PDG_KqN37Cy-fzgny_3uzX2-L225eb9eq2sCAhFR0ylL2tW8ghWmFFy6TtUXSNaqoau6pvaglMVkwx5Nx2IJlhdcNVV7amquGCfHryPc7tgJ3NUaLx-hjdYOKDDsbpf5XRHfRdOGm5dEvwbPD-2SCGHzNOSQ9usui9GTHMky4rIQUrG4CMvvsPvc89GHO8TIFS0EjZZOrDE2VjmKaI_e_PcKaX8eo_44VfQ-SVeg</recordid><startdate>20210602</startdate><enddate>20210602</enddate><creator>Švec, Martin</creator><creator>Vodičková, Věra</creator><creator>Hanus, Pavel</creator><creator>Pazourková Prokopčáková, Petra</creator><creator>Čamek, Libor</creator><creator>Moravec, Jaromír</creator><general>MDPI AG</general><general>MDPI</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0002-9434-6349</orcidid><orcidid>https://orcid.org/0000-0003-1533-1016</orcidid><orcidid>https://orcid.org/0000-0003-4731-5969</orcidid></search><sort><creationdate>20210602</creationdate><title>Effect of Higher Silicon Content and Heat Treatment on Structure Evolution and High-Temperature Behaviour of Fe-28Al-15Si-2Mo Alloy</title><author>Švec, Martin ; 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| subjects | Additives Alloying elements Annealing Brittleness Cooling Corrosion resistance Ductility Ferrous alloys Heat treatment High temperature Investigations Iron aluminides Machinability Mechanical properties Oxidation Phase stability Plasma sintering Powder metallurgy Silicon Solid solutions Stainless steel Steel alloys Temperature Thermal expansion Workability Yield strength Yield stress |
| title | Effect of Higher Silicon Content and Heat Treatment on Structure Evolution and High-Temperature Behaviour of Fe-28Al-15Si-2Mo Alloy |
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