Heterogeneous structure induced excellent mechanical and wear properties in Co-free FeCrAlNi medium-entropy alloys
Microstructure design and realization is an effective way to achieve strength-ductility synergy in high-entropy. In this work, two novel non-equiatomic Co-free low-cost medium-entropy alloys (MEAs), Fe30Cr30Al20Ni20 and Fe20Cr20Al30Ni30, were designed and prepared using an arc-melting method. Its ph...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-05-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422005932 |
| _version_ | 1811309046942138368 |
|---|---|
| author | Yake Xiao Xiangpeng Chang Xianghe Peng Tao Fu |
| author_facet | Yake Xiao Xiangpeng Chang Xianghe Peng Tao Fu |
| author_sort | Yake Xiao |
| collection | DOAJ |
| description | Microstructure design and realization is an effective way to achieve strength-ductility synergy in high-entropy. In this work, two novel non-equiatomic Co-free low-cost medium-entropy alloys (MEAs), Fe30Cr30Al20Ni20 and Fe20Cr20Al30Ni30, were designed and prepared using an arc-melting method. Its phase constitution, microstructure, mechanical and wear properties, as well as the strengthening mechanisms were investigated. It showed that both the MEAs are composed of BCC and B2 phases, rich in Fe–Cr and Ni–Al, respectively. The microstructure analysis indicated that the two MEAs have heterogeneous structures containing high-density precipitates and two alternant dual-phase eutectic structures. Significantly, the two MEAs possess excellent mechanical properties, better than most FeCrAlNiCo-based and FeCrAlNi-based HEAs reported previously. In the two MEAs, Fe20Cr20Al30Ni30 exhibits more excellent comprehensive mechanical and wear properties, with the compressive yield strength of 1154.5 MPa, maximum strength of 3271 MPa, maximum strain of over 40% and wear rate of 0.989 × 10−5 mm3N−1m−1, attributed to the novel heterogeneous microstructure. These results showed that the Co-free low-cost MEAs could have great prospects in practical engineering applications. |
| first_indexed | 2024-04-13T09:34:17Z |
| format | Article |
| id | doaj.art-49d54b26af464d05b98af1c0cbbf7f84 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-13T09:34:17Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-49d54b26af464d05b98af1c0cbbf7f842022-12-22T02:52:08ZengElsevierJournal of Materials Research and Technology2238-78542022-05-011841694180Heterogeneous structure induced excellent mechanical and wear properties in Co-free FeCrAlNi medium-entropy alloysYake Xiao0Xiangpeng Chang1Xianghe Peng2Tao Fu3Department of Engineering Mechanics, Chongqing University, Chongqing, 400044, ChinaCollege of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, ChinaDepartment of Engineering Mechanics, Chongqing University, Chongqing, 400044, China; State Key Laboratory of Coal Mining Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China; Corresponding author.Department of Engineering Mechanics, Chongqing University, Chongqing, 400044, China; State Key Laboratory of Coal Mining Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China; Corresponding author.Microstructure design and realization is an effective way to achieve strength-ductility synergy in high-entropy. In this work, two novel non-equiatomic Co-free low-cost medium-entropy alloys (MEAs), Fe30Cr30Al20Ni20 and Fe20Cr20Al30Ni30, were designed and prepared using an arc-melting method. Its phase constitution, microstructure, mechanical and wear properties, as well as the strengthening mechanisms were investigated. It showed that both the MEAs are composed of BCC and B2 phases, rich in Fe–Cr and Ni–Al, respectively. The microstructure analysis indicated that the two MEAs have heterogeneous structures containing high-density precipitates and two alternant dual-phase eutectic structures. Significantly, the two MEAs possess excellent mechanical properties, better than most FeCrAlNiCo-based and FeCrAlNi-based HEAs reported previously. In the two MEAs, Fe20Cr20Al30Ni30 exhibits more excellent comprehensive mechanical and wear properties, with the compressive yield strength of 1154.5 MPa, maximum strength of 3271 MPa, maximum strain of over 40% and wear rate of 0.989 × 10−5 mm3N−1m−1, attributed to the novel heterogeneous microstructure. These results showed that the Co-free low-cost MEAs could have great prospects in practical engineering applications.http://www.sciencedirect.com/science/article/pii/S2238785422005932Medium-entropy alloysCoherent precipitationHeterogeneous structureCompressive propertiesWear properties |
| spellingShingle | Yake Xiao Xiangpeng Chang Xianghe Peng Tao Fu Heterogeneous structure induced excellent mechanical and wear properties in Co-free FeCrAlNi medium-entropy alloys Journal of Materials Research and Technology Medium-entropy alloys Coherent precipitation Heterogeneous structure Compressive properties Wear properties |
| title | Heterogeneous structure induced excellent mechanical and wear properties in Co-free FeCrAlNi medium-entropy alloys |
| title_full | Heterogeneous structure induced excellent mechanical and wear properties in Co-free FeCrAlNi medium-entropy alloys |
| title_fullStr | Heterogeneous structure induced excellent mechanical and wear properties in Co-free FeCrAlNi medium-entropy alloys |
| title_full_unstemmed | Heterogeneous structure induced excellent mechanical and wear properties in Co-free FeCrAlNi medium-entropy alloys |
| title_short | Heterogeneous structure induced excellent mechanical and wear properties in Co-free FeCrAlNi medium-entropy alloys |
| title_sort | heterogeneous structure induced excellent mechanical and wear properties in co free fecralni medium entropy alloys |
| topic | Medium-entropy alloys Coherent precipitation Heterogeneous structure Compressive properties Wear properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422005932 |
| work_keys_str_mv | AT yakexiao heterogeneousstructureinducedexcellentmechanicalandwearpropertiesincofreefecralnimediumentropyalloys AT xiangpengchang heterogeneousstructureinducedexcellentmechanicalandwearpropertiesincofreefecralnimediumentropyalloys AT xianghepeng heterogeneousstructureinducedexcellentmechanicalandwearpropertiesincofreefecralnimediumentropyalloys AT taofu heterogeneousstructureinducedexcellentmechanicalandwearpropertiesincofreefecralnimediumentropyalloys |