High-Temperature Deformation Behaviors of the C-Doped and N-Doped High Entropy Alloys
High entropy alloys (HEAs) containing multi-principal metallic constituents have attracted much attention. A good understanding of their hot-deformation behavior and recrystallization mechanism is the prerequisite for microstructures tuning and for optimizing mechanical performance. Here, the flow b...
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| Format: | Article |
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MDPI AG
2021-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/10/1517 |
| _version_ | 1797513908444987392 |
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| author | Hailong Yi Yifan Zhang Renyi Xie Mengyuan Bi Daixiu Wei |
| author_facet | Hailong Yi Yifan Zhang Renyi Xie Mengyuan Bi Daixiu Wei |
| author_sort | Hailong Yi |
| collection | DOAJ |
| description | High entropy alloys (HEAs) containing multi-principal metallic constituents have attracted much attention. A good understanding of their hot-deformation behavior and recrystallization mechanism is the prerequisite for microstructures tuning and for optimizing mechanical performance. Here, the flow behavior and recrystallization mechanism of the N-doped and C-doped face-centered cubic phase HEAs are produced at high temperatures by hot-compression at 1123–1273 K, with strain rates of 0.1–0.001 s<sup>−1</sup>. Constitutive equations were successfully constructed to reveal flow behavior, and stress-strain curves were predicted using strain compensated polynomial functions. Discontinuous and continuous dynamic recrystallization proceeded concurrently when compressed at a low temperature and high strain rate, whereas discontinuous recrystallization, which occurs at primary grain boundaries, became predominant at a high temperature and low strain rate, significantly contributing to the refinement and homogenization of the grains. For this reason, a relatively high temperature and a low strain rate, in which the recrystallized grains exhibit equiaxed morphology and very weak texture, are more suitable for refining grains. The average size of the grains was approximately 10 μm. This study sheds light on grain optimization and mechanical properties through thermomechanical processing. |
| first_indexed | 2024-03-10T06:24:11Z |
| format | Article |
| id | doaj.art-98e81a85373443a6a691c7fbc50df9cf |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T06:24:11Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-98e81a85373443a6a691c7fbc50df9cf2023-11-22T19:08:03ZengMDPI AGMetals2075-47012021-09-011110151710.3390/met11101517High-Temperature Deformation Behaviors of the C-Doped and N-Doped High Entropy AlloysHailong Yi0Yifan Zhang1Renyi Xie2Mengyuan Bi3Daixiu Wei4State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaInstitute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Miyagi, JapanHigh entropy alloys (HEAs) containing multi-principal metallic constituents have attracted much attention. A good understanding of their hot-deformation behavior and recrystallization mechanism is the prerequisite for microstructures tuning and for optimizing mechanical performance. Here, the flow behavior and recrystallization mechanism of the N-doped and C-doped face-centered cubic phase HEAs are produced at high temperatures by hot-compression at 1123–1273 K, with strain rates of 0.1–0.001 s<sup>−1</sup>. Constitutive equations were successfully constructed to reveal flow behavior, and stress-strain curves were predicted using strain compensated polynomial functions. Discontinuous and continuous dynamic recrystallization proceeded concurrently when compressed at a low temperature and high strain rate, whereas discontinuous recrystallization, which occurs at primary grain boundaries, became predominant at a high temperature and low strain rate, significantly contributing to the refinement and homogenization of the grains. For this reason, a relatively high temperature and a low strain rate, in which the recrystallized grains exhibit equiaxed morphology and very weak texture, are more suitable for refining grains. The average size of the grains was approximately 10 μm. This study sheds light on grain optimization and mechanical properties through thermomechanical processing.https://www.mdpi.com/2075-4701/11/10/1517high entropy alloysinterstitial strengtheninghot deformationrecrystallizationconstitutive equationgrain structure |
| spellingShingle | Hailong Yi Yifan Zhang Renyi Xie Mengyuan Bi Daixiu Wei High-Temperature Deformation Behaviors of the C-Doped and N-Doped High Entropy Alloys Metals high entropy alloys interstitial strengthening hot deformation recrystallization constitutive equation grain structure |
| title | High-Temperature Deformation Behaviors of the C-Doped and N-Doped High Entropy Alloys |
| title_full | High-Temperature Deformation Behaviors of the C-Doped and N-Doped High Entropy Alloys |
| title_fullStr | High-Temperature Deformation Behaviors of the C-Doped and N-Doped High Entropy Alloys |
| title_full_unstemmed | High-Temperature Deformation Behaviors of the C-Doped and N-Doped High Entropy Alloys |
| title_short | High-Temperature Deformation Behaviors of the C-Doped and N-Doped High Entropy Alloys |
| title_sort | high temperature deformation behaviors of the c doped and n doped high entropy alloys |
| topic | high entropy alloys interstitial strengthening hot deformation recrystallization constitutive equation grain structure |
| url | https://www.mdpi.com/2075-4701/11/10/1517 |
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