Tensile deformation behavior and strengthening mechanism of a Fe₂.₅Ni₂.₅CrAl multi-principal element alloy
The microstructure and tensile deformation behavior of a Fe2.5Ni2.5CrAl multi-principal element alloy (MPEA) were investigated. The combined effect of the soft FCC phase and the hard BCC + B2 microconstituent resulted in a best-in-class strength-ductility combination. The stress–strain relationship...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/169158 |
| _version_ | 1811688732063956992 |
|---|---|
| author | Qiao, Ling Ramanujan, Raju V. Zhu, Jingchuan |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Qiao, Ling Ramanujan, Raju V. Zhu, Jingchuan |
| author_sort | Qiao, Ling |
| collection | NTU |
| description | The microstructure and tensile deformation behavior of a Fe2.5Ni2.5CrAl multi-principal element alloy (MPEA) were investigated. The combined effect of the soft FCC phase and the hard BCC + B2 microconstituent resulted in a best-in-class strength-ductility combination. The stress–strain relationship obtained from nano-indentation tests agrees well with the tensile stress–strain curves. The fracture surface of Fe2.5Ni2.5CrAl MPEAs indicates the ductile fracture. Cracks tend to form at the interfaces of the FCC/BCC phases and expand along the voids by plastic deformation. Both dislocations and deformation twinning were responsible for the excellent properties. Second phase strengthening resulted in the largest strength increment. MD simulations revealed the formation of the HCP structure and stacking faults. Shockley dislocations were the key factor in the deformation behavior. Our study has shown best-in-class strength-ductility combination in a commercially relevant multi principal element alloy, the results are promising for several industrial applications. |
| first_indexed | 2024-10-01T05:36:53Z |
| format | Journal Article |
| id | ntu-10356/169158 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:36:53Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1691582023-07-14T15:45:57Z Tensile deformation behavior and strengthening mechanism of a Fe₂.₅Ni₂.₅CrAl multi-principal element alloy Qiao, Ling Ramanujan, Raju V. Zhu, Jingchuan School of Materials Science and Engineering Engineering::Materials Multi-Principal Elements Alloys Nano-Indentation The microstructure and tensile deformation behavior of a Fe2.5Ni2.5CrAl multi-principal element alloy (MPEA) were investigated. The combined effect of the soft FCC phase and the hard BCC + B2 microconstituent resulted in a best-in-class strength-ductility combination. The stress–strain relationship obtained from nano-indentation tests agrees well with the tensile stress–strain curves. The fracture surface of Fe2.5Ni2.5CrAl MPEAs indicates the ductile fracture. Cracks tend to form at the interfaces of the FCC/BCC phases and expand along the voids by plastic deformation. Both dislocations and deformation twinning were responsible for the excellent properties. Second phase strengthening resulted in the largest strength increment. MD simulations revealed the formation of the HCP structure and stacking faults. Shockley dislocations were the key factor in the deformation behavior. Our study has shown best-in-class strength-ductility combination in a commercially relevant multi principal element alloy, the results are promising for several industrial applications. Agency for Science, Technology and Research (A*STAR) Published version This work is supported by AME Programmatic Fund by the Agency for Science, Technology and Research, Singapore under Grants No. A1898b0043 and A18B1b0061 and the China Scholarship Council. 2023-07-04T02:37:01Z 2023-07-04T02:37:01Z 2023 Journal Article Qiao, L., Ramanujan, R. V. & Zhu, J. (2023). Tensile deformation behavior and strengthening mechanism of a Fe₂.₅Ni₂.₅CrAl multi-principal element alloy. Materials & Design, 230, 111963-. https://dx.doi.org/10.1016/j.matdes.2023.111963 0264-1275 https://hdl.handle.net/10356/169158 10.1016/j.matdes.2023.111963 2-s2.0-85154072223 230 111963 en A1898b0043 A18B1b0061 Materials & Design © 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). application/pdf |
| spellingShingle | Engineering::Materials Multi-Principal Elements Alloys Nano-Indentation Qiao, Ling Ramanujan, Raju V. Zhu, Jingchuan Tensile deformation behavior and strengthening mechanism of a Fe₂.₅Ni₂.₅CrAl multi-principal element alloy |
| title | Tensile deformation behavior and strengthening mechanism of a Fe₂.₅Ni₂.₅CrAl multi-principal element alloy |
| title_full | Tensile deformation behavior and strengthening mechanism of a Fe₂.₅Ni₂.₅CrAl multi-principal element alloy |
| title_fullStr | Tensile deformation behavior and strengthening mechanism of a Fe₂.₅Ni₂.₅CrAl multi-principal element alloy |
| title_full_unstemmed | Tensile deformation behavior and strengthening mechanism of a Fe₂.₅Ni₂.₅CrAl multi-principal element alloy |
| title_short | Tensile deformation behavior and strengthening mechanism of a Fe₂.₅Ni₂.₅CrAl multi-principal element alloy |
| title_sort | tensile deformation behavior and strengthening mechanism of a fe₂ ₅ni₂ ₅cral multi principal element alloy |
| topic | Engineering::Materials Multi-Principal Elements Alloys Nano-Indentation |
| url | https://hdl.handle.net/10356/169158 |
| work_keys_str_mv | AT qiaoling tensiledeformationbehaviorandstrengtheningmechanismofafe25ni25cralmultiprincipalelementalloy AT ramanujanrajuv tensiledeformationbehaviorandstrengtheningmechanismofafe25ni25cralmultiprincipalelementalloy AT zhujingchuan tensiledeformationbehaviorandstrengtheningmechanismofafe25ni25cralmultiprincipalelementalloy |