Phase transformation - induced strengthening of an additively manufactured multi- principal element CrMnFeCoNi alloy. (October 2020)

• Record Type: Journal Article
• Authors: Li, Jinfeng; Luan, Hengwei; Zhou, Linsen; Amar, Abdukadir; Li, Rui; Huang, Liufei; Liu, Xue; Le, Guomin; Wang, Xiaoying; Wu, Jian; Jiang, Chunli
• Is Part Of: Materials & design. Volume 195(2020)
• Publication Date: 2020-10
• Subjects: Multi-principal element alloy -- Laser metal deposition -- Microstructure -- Transformation-induced plasticity; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2020.108999
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: A laser metal deposition (LMD) process has been applied to the fabrications of the (CrMnFeCoNi)1-x Fex (x = 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6) Multi-principal elements alloys (MPEAs). It is found that the LMD-fabricated (CrMnFeCoNi)50 Fe50 alloy keeps a single-phase solid solution microstructure. Compared with the CrMnFeCoNi MPEA, the (CrMnFeCoNi)50 Fe50 alloy obtains remarkably improved plasticity from 45% to 77%, while maintaining tensile strength (415 MPa to 470 MPa), due to the strain-induced FCC to BCC phase transformation. Furthermore, the (CrMnFeCoNi)50 Fe50 alloy shows excellent mechanical properties at cryogenic temperatures. This alloy has lower cost and better mechanical property than the well-known CrMnFeCoNi MPEA by the addition of inexpensive Fe elements. The present work provides important pathways in the development of low-cost LMD-fabricated MPEA for cryogenic engineering applications. Graphical abstract: Unlabelled Image Highlights: The (CrMnFeCoNi)50 Fe50 multi-principal element alloy keeps an FCC solid solution. The alloy shows excellent plasticity properties at cryogenic temperatures. Strain- induced phase transformation was observed during tensile testing.