| Title: |
Heterostructure-enabled creep resistance and deformation mechanisms in a new Ni-Co-based high-entropy alloy |
| Authors: |
Jinxiong Hou; Lijun Jing; Boxuan Cao; Yilu Zhao; Zhongkai Ren; Tao Wang; Zhihua Wang; Hyoung Seop Kim; Tao Yang |
| Source: |
Materials Research Letters, Vol 13, Iss 12, Pp 1242-1251 (2025) |
| Publisher Information: |
Taylor & Francis Group, 2025. |
| Publication Year: |
2025 |
| Collection: |
LCC:Materials of engineering and construction. Mechanics of materials |
| Subject Terms: |
High-entropy alloy; Precipitation strengthening; Heterostructure; Creep; Materials of engineering and construction. Mechanics of materials; TA401-492 |
| Description: |
A novel Ni-Co-based high-entropy alloy (HEA) featuring a stable FCC + L12 dual-phase structure was developed to address creep embrittlement at intermediate temperature. By creating heterostructures in the present HEA, the yield strength of Ni-Co-based HEA was significantly improved from 1100 MPa to 1500 MPa with an acceptable tensile elongation of 10%. Simultaneously, the creep embrittlement can be defeated in their heterogeneous counterparts with a superior low steady creep rate of 0.00044%/h at 725 °C and 630 MPa. Transmission electron microscopy evidence suggests that the anti-phase boundaries (APBs) and superlattice intrinsic stacking faults (SISFs) shear the precipitates during the deformation. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2166-3831 |
| Relation: |
https://doaj.org/toc/2166-3831 |
| DOI: |
10.1080/21663831.2025.2576487 |
| Access URL: |
https://doaj.org/article/b3f7cd1b400a4fec94aa45f92d0bd1ab |
| Accession Number: |
edsdoj.b3f7cd1b400a4fec94aa45f92d0bd1ab |
| Database: |
Directory of Open Access Journals |