Microstructure Refinement of a Transformation-Induced Plasticity High-Entropy Alloy
High-entropy alloys (HEAs) have attracted extensive interest due to their unprecedented structure and mechanical performance. We recently proposed a series of novel corich twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) HEAs with superior tensile properties at room te...
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| Format: | Article |
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MDPI AG
2021-03-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/5/1196 |
| _version_ | 1797414741842329600 |
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| author | Hailong Yi Daixiu Wei Renyi Xie Yifan Zhang Hidemi Kato |
| author_facet | Hailong Yi Daixiu Wei Renyi Xie Yifan Zhang Hidemi Kato |
| author_sort | Hailong Yi |
| collection | DOAJ |
| description | High-entropy alloys (HEAs) have attracted extensive interest due to their unprecedented structure and mechanical performance. We recently proposed a series of novel corich twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) HEAs with superior tensile properties at room temperature; however, the hot deformation behavior has not been reported. Here, we investigated the dynamic recrystallization behavior and grain refinement of a representative TRIP-HEA, compressed at temperatures of 1123–1273 K with strain rates of 0.1–0.001 s<sup>−1</sup>. We characterized the impact of the temperature and strain rate on the grain structure evolution. A constitutive equation was constructed to reveal the correlations between the flow stress, strain rate, temperature, and strain. The apparent activation energy was estimated to be ~385.7 kJ/mol. The discontinuous dynamic recrystallization played an important role in the grain refinement, particularly at a relatively higher temperature and a lower strain rate, and the volume fraction and morphology of the recrystallized grains exhibited a strong dependency on the Zener–Hollomon parameter. The study provides guidelines for the grain refinement of HEAs through thermomechanical processing. |
| first_indexed | 2024-03-09T05:37:58Z |
| format | Article |
| id | doaj.art-b0c8c715e598411cacad863893f5fddc |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T05:37:58Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-b0c8c715e598411cacad863893f5fddc2023-12-03T12:27:42ZengMDPI AGMaterials1996-19442021-03-01145119610.3390/ma14051196Microstructure Refinement of a Transformation-Induced Plasticity High-Entropy AlloyHailong Yi0Daixiu Wei1Renyi Xie2Yifan Zhang3Hidemi Kato4State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaInstitute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Miyagi, JapanState 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) have attracted extensive interest due to their unprecedented structure and mechanical performance. We recently proposed a series of novel corich twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) HEAs with superior tensile properties at room temperature; however, the hot deformation behavior has not been reported. Here, we investigated the dynamic recrystallization behavior and grain refinement of a representative TRIP-HEA, compressed at temperatures of 1123–1273 K with strain rates of 0.1–0.001 s<sup>−1</sup>. We characterized the impact of the temperature and strain rate on the grain structure evolution. A constitutive equation was constructed to reveal the correlations between the flow stress, strain rate, temperature, and strain. The apparent activation energy was estimated to be ~385.7 kJ/mol. The discontinuous dynamic recrystallization played an important role in the grain refinement, particularly at a relatively higher temperature and a lower strain rate, and the volume fraction and morphology of the recrystallized grains exhibited a strong dependency on the Zener–Hollomon parameter. The study provides guidelines for the grain refinement of HEAs through thermomechanical processing.https://www.mdpi.com/1996-1944/14/5/1196high-entropy alloyhot deformationdynamic recrystallizationconstitutive equationmicrostructure |
| spellingShingle | Hailong Yi Daixiu Wei Renyi Xie Yifan Zhang Hidemi Kato Microstructure Refinement of a Transformation-Induced Plasticity High-Entropy Alloy Materials high-entropy alloy hot deformation dynamic recrystallization constitutive equation microstructure |
| title | Microstructure Refinement of a Transformation-Induced Plasticity High-Entropy Alloy |
| title_full | Microstructure Refinement of a Transformation-Induced Plasticity High-Entropy Alloy |
| title_fullStr | Microstructure Refinement of a Transformation-Induced Plasticity High-Entropy Alloy |
| title_full_unstemmed | Microstructure Refinement of a Transformation-Induced Plasticity High-Entropy Alloy |
| title_short | Microstructure Refinement of a Transformation-Induced Plasticity High-Entropy Alloy |
| title_sort | microstructure refinement of a transformation induced plasticity high entropy alloy |
| topic | high-entropy alloy hot deformation dynamic recrystallization constitutive equation microstructure |
| url | https://www.mdpi.com/1996-1944/14/5/1196 |
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