中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 29 No. 10 October 2019 |
（1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material, Hunan University of Science and Technology, Xiangtan 411201, China）
Abstract:The effects of Al and Sc on mechanical properties of FeCoNi multi-element alloys (MEAs) were investigated by compressive tests. The microstructures of FeCoNi MEAs with different contents of Al and Sc were characterized and the strengthening mechanisms were discussed. The results show that FeCoNi MEA with a low content of Al has a face-centered cubic (FCC) structure. The yield strength increases linearly with the increase of Al content, which is largely caused by solid solution hardening. Further addition of Sc can promote the formation of a new phase in (FeCoNi)1-xAlx MEAs. A minor addition of Sc can significantly increase the yield strengths of (FeCoNi)1-xAlx MEAs with a low Al content and improve the compressive plasticity of (FeCoNi)1-xAlx MEAs with a high Al content.
Key words: FeCoNi multi-element alloys; mechanical properties; microstructure; strengthening mechanism
