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| Home > Publications database > Co-free Al$_{0.5}$CrNi$_{1.5}$Fe$_2$ multi-principal element alloy with heterogeneous structure and excellent strength-ductility combination > print |
| 001 | 644960 | ||
| 005 | 20260129095752.0 | ||
| 024 | 7 | _ | |a 10.1016/j.jallcom.2025.179563 |2 doi |
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| 082 | _ | _ | |a 540 |
| 100 | 1 | _ | |a Peng, Sizhe |b 0 |
| 245 | _ | _ | |a Co-free Al$_{0.5}$CrNi$_{1.5}$Fe$_2$ multi-principal element alloy with heterogeneous structure and excellent strength-ductility combination |
| 260 | _ | _ | |a Lausanne |c 2025 |b Elsevier |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a This study investigates a cost-effective, cobalt-free Al$_{0.5}$CrNi$_{1.5}$Fe$_2$ multi-principal element alloy, based on the most studied AlCoCrFeNi alloy system. The alloy underwent thermal mechanical treatment to induce partial recrystallization, resulting in a multi-phase, multi-scale heterogeneous microstructure. After cold rolling the Al$_{0.5}$CrNi$_{1.5}$Fe$_2$ alloy to 80 % reduction and annealing at 800°C for 1 hour, a heterogeneous structure predominantly consisting of “fine-grained recrystallized regions and nano-grained un-recrystallized regions” was formed. The phase compositions of both regions included a disordered FCC matrix and dispersed ordered BCC (B2) precipitates enriched in Al and Ni, as well as disordered BCC precipitates enriched in Fe and Cr. The alloy exhibited a yield strength of 1035 MPa and an elongation of 20.8 %. Compared to its as-cast counterpart, the elongation decreased slightly, while the yield strength increased by 238 %, achieving an excellent combination of high strength, high ductility, and low cost. Cyclic tensile testing revealed that the heterogeneous deformation-induced stress, driven by the heterogeneous microstructure, accounted for over 49 % of the flow stress. This stress, representing the dominant strengthening mechanism, plays a crucial role in maintaining both high strength and ductility in this Co-free alloy. |
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| 700 | 1 | _ | |a Jiang, Zhenfei |0 P:(DE-HGF)0 |b 1 |e Corresponding author |
| 700 | 1 | _ | |a Wang, Zhong |b 2 |
| 700 | 1 | _ | |a Liu, Junchen |b 3 |
| 700 | 1 | _ | |a Zhu, Gaoming |0 P:(DE-H253)PIP1084066 |b 4 |e Corresponding author |
| 700 | 1 | _ | |a Liu, Yinghang |b 5 |
| 700 | 1 | _ | |a Song, Zhe |b 6 |
| 700 | 1 | _ | |a Zhu, Dezhi |0 P:(DE-HGF)0 |b 7 |e Corresponding author |
| 773 | _ | _ | |a 10.1016/j.jallcom.2025.179563 |g Vol. 1021, p. 179563 - |0 PERI:(DE-600)2012675-X |p 179563 |t Journal of alloys and compounds |v 1021 |y 2025 |x 0925-8388 |
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