Details
| Original language | English |
|---|---|
| Title of host publication | 31st International Conference on Metallurgy and Materials, METAL 2022 |
| Pages | 199-204 |
| Number of pages | 6 |
| ISBN (electronic) | 9788088365068 |
| Publication status | Published - 30 Jun 2022 |
| Event | 31st International Conference on Metallurgy and Materials, METAL 2022 - Brno, Czech Republic Duration: 18 May 2022 → 19 May 2022 |
Publication series
| Name | Proceedings International Conference on Metallurgy and Materials |
|---|
Abstract
Due to their higher weight-specific and high-temperature strength, iron-aluminium alloys have a high potential to replace steel in various applications. The good availability of the two materials, the excellent recyclability, lower density with increasing aluminium content and the high corrosion resistance in sulphide- and sulphur-rich environments are further advantages. However, with increasing aluminium content, ductility of FeAl alloys decreases due to hydrogen embrittlement at room temperature. As a result, iron-aluminium alloys have been excluded from potential applications, particularly structural ones. Investigations on powder metallurgical produced iron-aluminium alloys show that fine-grained microstructures can lead to significant improvement in ductility. Assuming equal grain diameters, higher toughness is expected in case of metallurgical ingot production followed by hot forming. The present work deals with the mechanical properties of fine-grained microstructure in iron-rich iron-aluminium alloys, pre-processed through Equal Channel Angular Pressing. In order to characterize the mechanical properties, compression tests with the alloys Fe9AI, Fe28AI and Fe38AI are carried out at different temperatures. The flow curves determined are then compared with those from as-cast state. In addition, deformation capacity is examined optically on slopes of external cracks. In conclusion, the results are discussed based on the microstructure.
Keywords
- Equal Channel Angular Pressing (ECAP), Flow stress, Hot forming, Iron-aluminium alloys, Microstructure
ASJC Scopus subject areas
- Engineering(all)
- Mechanics of Materials
- Materials Science(all)
- Metals and Alloys
- Materials Science(all)
- Surfaces, Coatings and Films
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31st International Conference on Metallurgy and Materials, METAL 2022. 2022. p. 199-204 (Proceedings International Conference on Metallurgy and Materials ).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Influence of the microstructure on flow stress and deformability of iron-aluminium alloys
AU - Peddinghaus, Julius
AU - Brunotte, Kai
AU - Wester, Hendrik
AU - Till, Michael
AU - Kock, Christoph
AU - Behrens, Bernd Arno
N1 - Funding Information: The authors would like to thank the German Research Foundation (DFG) for the financial support [funding number: 142849202].
PY - 2022/6/30
Y1 - 2022/6/30
N2 - Due to their higher weight-specific and high-temperature strength, iron-aluminium alloys have a high potential to replace steel in various applications. The good availability of the two materials, the excellent recyclability, lower density with increasing aluminium content and the high corrosion resistance in sulphide- and sulphur-rich environments are further advantages. However, with increasing aluminium content, ductility of FeAl alloys decreases due to hydrogen embrittlement at room temperature. As a result, iron-aluminium alloys have been excluded from potential applications, particularly structural ones. Investigations on powder metallurgical produced iron-aluminium alloys show that fine-grained microstructures can lead to significant improvement in ductility. Assuming equal grain diameters, higher toughness is expected in case of metallurgical ingot production followed by hot forming. The present work deals with the mechanical properties of fine-grained microstructure in iron-rich iron-aluminium alloys, pre-processed through Equal Channel Angular Pressing. In order to characterize the mechanical properties, compression tests with the alloys Fe9AI, Fe28AI and Fe38AI are carried out at different temperatures. The flow curves determined are then compared with those from as-cast state. In addition, deformation capacity is examined optically on slopes of external cracks. In conclusion, the results are discussed based on the microstructure.
AB - Due to their higher weight-specific and high-temperature strength, iron-aluminium alloys have a high potential to replace steel in various applications. The good availability of the two materials, the excellent recyclability, lower density with increasing aluminium content and the high corrosion resistance in sulphide- and sulphur-rich environments are further advantages. However, with increasing aluminium content, ductility of FeAl alloys decreases due to hydrogen embrittlement at room temperature. As a result, iron-aluminium alloys have been excluded from potential applications, particularly structural ones. Investigations on powder metallurgical produced iron-aluminium alloys show that fine-grained microstructures can lead to significant improvement in ductility. Assuming equal grain diameters, higher toughness is expected in case of metallurgical ingot production followed by hot forming. The present work deals with the mechanical properties of fine-grained microstructure in iron-rich iron-aluminium alloys, pre-processed through Equal Channel Angular Pressing. In order to characterize the mechanical properties, compression tests with the alloys Fe9AI, Fe28AI and Fe38AI are carried out at different temperatures. The flow curves determined are then compared with those from as-cast state. In addition, deformation capacity is examined optically on slopes of external cracks. In conclusion, the results are discussed based on the microstructure.
KW - Equal Channel Angular Pressing (ECAP)
KW - Flow stress
KW - Hot forming
KW - Iron-aluminium alloys
KW - Microstructure
UR - http://www.scopus.com/inward/record.url?scp=85144128898&partnerID=8YFLogxK
U2 - 10.37904/metal.2022.4393
DO - 10.37904/metal.2022.4393
M3 - Conference contribution
AN - SCOPUS:85144128898
T3 - Proceedings International Conference on Metallurgy and Materials
SP - 199
EP - 204
BT - 31st International Conference on Metallurgy and Materials, METAL 2022
T2 - 31st International Conference on Metallurgy and Materials, METAL 2022
Y2 - 18 May 2022 through 19 May 2022
ER -