Effect of Ti on Characterization and Properties of CoCrFeNiTi<sub>x</sub> High Entropy Alloy Prepared Via Electro-Deoxidization of the Metal Oxides and Vacuum Hot Pressing Sintering Process
The CoCrFeNi system is one of the most important high entropy alloys (HEAs) systems. By adding and adjusting the alloy element components and using different synthesis methods, different phases, organization and microstructure can be obtained, thus improving their properties. In this study, CoCrFeNi...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-02-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/16/4/1547 |
| _version_ | 1797619595934171136 |
|---|---|
| author | Hui Li Sheng Zhang Jinglong Liang Meilong Hu Yu Yang |
| author_facet | Hui Li Sheng Zhang Jinglong Liang Meilong Hu Yu Yang |
| author_sort | Hui Li |
| collection | DOAJ |
| description | The CoCrFeNi system is one of the most important high entropy alloys (HEAs) systems. By adding and adjusting the alloy element components and using different synthesis methods, different phases, organization and microstructure can be obtained, thus improving their properties. In this study, CoCrFeNiTi<sub>x</sub> HEAs with various Ti contents (x in molar ratio, x = 0, 0.5, 1.0, 1.5) were fabricated by an electrochemical process by virtue of different oxides. The impacts of different Ti contents on the structure, distribution of elements, mechanical properties and corrosion behavior were researched using XRD, EDX and other testing methods. The bulk CoCrFeNiTi<sub>x</sub> (x = 0, 0.5, 1.0, 1.5) HEAs could be obtained through vacuum hot pressing sintering process (VHPS), which had a single-phase FCC structure. The results of the study showed that the bulk CoCrFeNiTi<sub>x</sub> exhibited superior ultimate tensile strength (UTS) and hardness, with the UTS of CoCrFeNiTi as high as 783 MPa and the hardness of CoCrFeNiTi<sub>1.5</sub> reaching 669 HV. The corrosion behavior of CoCrFeNiTi<sub>x</sub> (x = 0, 0.5, 1.0, 1.5) HEAs in 0.5 M H<sub>2</sub>SO<sub>4</sub>, 1 M KOH and 3.5 wt% NaCl was improved with addition of Ti. CoCrFeNiTi<sub>x</sub> (x = 0, 0.5, 1.0, 1.5) HEAs have great potential for application in the fields of biomedical coating and aerospace, as well as extreme military industry, etc. |
| first_indexed | 2024-03-11T08:29:12Z |
| format | Article |
| id | doaj.art-39709e60c3554f4cbe1ee6fc3c2f2c49 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T08:29:12Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-39709e60c3554f4cbe1ee6fc3c2f2c492023-11-16T21:51:16ZengMDPI AGMaterials1996-19442023-02-01164154710.3390/ma16041547Effect of Ti on Characterization and Properties of CoCrFeNiTi<sub>x</sub> High Entropy Alloy Prepared Via Electro-Deoxidization of the Metal Oxides and Vacuum Hot Pressing Sintering ProcessHui Li0Sheng Zhang1Jinglong Liang2Meilong Hu3Yu Yang4College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaThe CoCrFeNi system is one of the most important high entropy alloys (HEAs) systems. By adding and adjusting the alloy element components and using different synthesis methods, different phases, organization and microstructure can be obtained, thus improving their properties. In this study, CoCrFeNiTi<sub>x</sub> HEAs with various Ti contents (x in molar ratio, x = 0, 0.5, 1.0, 1.5) were fabricated by an electrochemical process by virtue of different oxides. The impacts of different Ti contents on the structure, distribution of elements, mechanical properties and corrosion behavior were researched using XRD, EDX and other testing methods. The bulk CoCrFeNiTi<sub>x</sub> (x = 0, 0.5, 1.0, 1.5) HEAs could be obtained through vacuum hot pressing sintering process (VHPS), which had a single-phase FCC structure. The results of the study showed that the bulk CoCrFeNiTi<sub>x</sub> exhibited superior ultimate tensile strength (UTS) and hardness, with the UTS of CoCrFeNiTi as high as 783 MPa and the hardness of CoCrFeNiTi<sub>1.5</sub> reaching 669 HV. The corrosion behavior of CoCrFeNiTi<sub>x</sub> (x = 0, 0.5, 1.0, 1.5) HEAs in 0.5 M H<sub>2</sub>SO<sub>4</sub>, 1 M KOH and 3.5 wt% NaCl was improved with addition of Ti. CoCrFeNiTi<sub>x</sub> (x = 0, 0.5, 1.0, 1.5) HEAs have great potential for application in the fields of biomedical coating and aerospace, as well as extreme military industry, etc.https://www.mdpi.com/1996-1944/16/4/1547high entropy alloysmolten salt electro-deoxidizationmechanical propertiescorrosion resistance |
| spellingShingle | Hui Li Sheng Zhang Jinglong Liang Meilong Hu Yu Yang Effect of Ti on Characterization and Properties of CoCrFeNiTi<sub>x</sub> High Entropy Alloy Prepared Via Electro-Deoxidization of the Metal Oxides and Vacuum Hot Pressing Sintering Process Materials high entropy alloys molten salt electro-deoxidization mechanical properties corrosion resistance |
| title | Effect of Ti on Characterization and Properties of CoCrFeNiTi<sub>x</sub> High Entropy Alloy Prepared Via Electro-Deoxidization of the Metal Oxides and Vacuum Hot Pressing Sintering Process |
| title_full | Effect of Ti on Characterization and Properties of CoCrFeNiTi<sub>x</sub> High Entropy Alloy Prepared Via Electro-Deoxidization of the Metal Oxides and Vacuum Hot Pressing Sintering Process |
| title_fullStr | Effect of Ti on Characterization and Properties of CoCrFeNiTi<sub>x</sub> High Entropy Alloy Prepared Via Electro-Deoxidization of the Metal Oxides and Vacuum Hot Pressing Sintering Process |
| title_full_unstemmed | Effect of Ti on Characterization and Properties of CoCrFeNiTi<sub>x</sub> High Entropy Alloy Prepared Via Electro-Deoxidization of the Metal Oxides and Vacuum Hot Pressing Sintering Process |
| title_short | Effect of Ti on Characterization and Properties of CoCrFeNiTi<sub>x</sub> High Entropy Alloy Prepared Via Electro-Deoxidization of the Metal Oxides and Vacuum Hot Pressing Sintering Process |
| title_sort | effect of ti on characterization and properties of cocrfeniti sub x sub high entropy alloy prepared via electro deoxidization of the metal oxides and vacuum hot pressing sintering process |
| topic | high entropy alloys molten salt electro-deoxidization mechanical properties corrosion resistance |
| url | https://www.mdpi.com/1996-1944/16/4/1547 |
| work_keys_str_mv | AT huili effectoftioncharacterizationandpropertiesofcocrfenitisubxsubhighentropyalloypreparedviaelectrodeoxidizationofthemetaloxidesandvacuumhotpressingsinteringprocess AT shengzhang effectoftioncharacterizationandpropertiesofcocrfenitisubxsubhighentropyalloypreparedviaelectrodeoxidizationofthemetaloxidesandvacuumhotpressingsinteringprocess AT jinglongliang effectoftioncharacterizationandpropertiesofcocrfenitisubxsubhighentropyalloypreparedviaelectrodeoxidizationofthemetaloxidesandvacuumhotpressingsinteringprocess AT meilonghu effectoftioncharacterizationandpropertiesofcocrfenitisubxsubhighentropyalloypreparedviaelectrodeoxidizationofthemetaloxidesandvacuumhotpressingsinteringprocess AT yuyang effectoftioncharacterizationandpropertiesofcocrfenitisubxsubhighentropyalloypreparedviaelectrodeoxidizationofthemetaloxidesandvacuumhotpressingsinteringprocess |