A novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperatures
A Co25.1Cr18.8Fe23.3Ni22.6Ta8.5Al1.7 (at. %) eutectic high-entropy alloy (EHEA) consisting of face-centered-cubic (FCC) and C14 Laves phases was produced by powder metallurgy. The EHEA shows an equiaxed morphology that is different from eutectic lamellar structure. Nanometer L12 phase (4–5 nm) furth...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2020-10-01
|
| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/21663831.2020.1772395 |
| id |
doaj-587d0542d6814522af4df512785124c1 |
|---|---|
| record_format |
Article |
| spelling |
doaj-587d0542d6814522af4df512785124c12020-11-25T03:48:35ZengTaylor & Francis GroupMaterials Research Letters2166-38312020-10-0181037338210.1080/21663831.2020.17723951772395A novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperaturesLiuliu Han0Xiandong Xu1Zhiming Li2Bin Liu3C. T. Liu4Yong Liu5State Key Laboratory of Powder Metallurgy, Central South UniversityCenter for Electron Microscopy, College of Materials Science and Engineering, Hunan UniversityState Key Laboratory of Powder Metallurgy, Central South UniversityState Key Laboratory of Powder Metallurgy, Central South UniversityDepartment of Materials Science and Engineering, City University of Hong KongState Key Laboratory of Powder Metallurgy, Central South UniversityA Co25.1Cr18.8Fe23.3Ni22.6Ta8.5Al1.7 (at. %) eutectic high-entropy alloy (EHEA) consisting of face-centered-cubic (FCC) and C14 Laves phases was produced by powder metallurgy. The EHEA shows an equiaxed morphology that is different from eutectic lamellar structure. Nanometer L12 phase (4–5 nm) further precipitates in FCC matrix. The microstructure is highly stable upon annealing at 1000°C for 100 h, which leads to attractive high-temperature strength. The fracture behaviour is observed to be modified by the equiaxed Laves phase, which contains microcracks induced by multiple dislocation slips. The diversified cracking modes help to relieve stress concentration and therefore enhance ductility at high temperatures.http://dx.doi.org/10.1080/21663831.2020.1772395nanoscale precipitationhigh-temperature tensile propertieseutectic high-entropy alloysequiaxed structure |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Liuliu Han Xiandong Xu Zhiming Li Bin Liu C. T. Liu Yong Liu |
| spellingShingle |
Liuliu Han Xiandong Xu Zhiming Li Bin Liu C. T. Liu Yong Liu A novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperatures Materials Research Letters nanoscale precipitation high-temperature tensile properties eutectic high-entropy alloys equiaxed structure |
| author_facet |
Liuliu Han Xiandong Xu Zhiming Li Bin Liu C. T. Liu Yong Liu |
| author_sort |
Liuliu Han |
| title |
A novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperatures |
| title_short |
A novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperatures |
| title_full |
A novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperatures |
| title_fullStr |
A novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperatures |
| title_full_unstemmed |
A novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperatures |
| title_sort |
novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperatures |
| publisher |
Taylor & Francis Group |
| series |
Materials Research Letters |
| issn |
2166-3831 |
| publishDate |
2020-10-01 |
| description |
A Co25.1Cr18.8Fe23.3Ni22.6Ta8.5Al1.7 (at. %) eutectic high-entropy alloy (EHEA) consisting of face-centered-cubic (FCC) and C14 Laves phases was produced by powder metallurgy. The EHEA shows an equiaxed morphology that is different from eutectic lamellar structure. Nanometer L12 phase (4–5 nm) further precipitates in FCC matrix. The microstructure is highly stable upon annealing at 1000°C for 100 h, which leads to attractive high-temperature strength. The fracture behaviour is observed to be modified by the equiaxed Laves phase, which contains microcracks induced by multiple dislocation slips. The diversified cracking modes help to relieve stress concentration and therefore enhance ductility at high temperatures. |
| topic |
nanoscale precipitation high-temperature tensile properties eutectic high-entropy alloys equiaxed structure |
| url |
http://dx.doi.org/10.1080/21663831.2020.1772395 |
| work_keys_str_mv |
AT liuliuhan anovelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures AT xiandongxu anovelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures AT zhimingli anovelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures AT binliu anovelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures AT ctliu anovelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures AT yongliu anovelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures AT liuliuhan novelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures AT xiandongxu novelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures AT zhimingli novelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures AT binliu novelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures AT ctliu novelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures AT yongliu novelequiaxedeutectichighentropyalloywithexcellentmechanicalpropertiesatelevatedtemperatures |
| _version_ |
1724498273256865792 |