Hot Deformation Behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe Alloy in α + β Field
The deformation behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe high strength β titanium alloy is systematically investigated by isothermal compression in α + β field with the deformation temperatures ranging from 1003 K to 1078 K, the strain rates ranging from 0.001 s−1 to 1 s−1 and the height reductio...
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| Format: | Article |
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MDPI AG
2015-02-01
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| Series: | Metals |
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| Online Access: | http://www.mdpi.com/2075-4701/5/1/216 |
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| author | Zhaoxin Du Shulong Xiao Jingshun Liu Shufeng Lv Lijuan Xu Fantao Kong Yuyong Chen |
| author_facet | Zhaoxin Du Shulong Xiao Jingshun Liu Shufeng Lv Lijuan Xu Fantao Kong Yuyong Chen |
| author_sort | Zhaoxin Du |
| collection | DOAJ |
| description | The deformation behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe high strength β titanium alloy is systematically investigated by isothermal compression in α + β field with the deformation temperatures ranging from 1003 K to 1078 K, the strain rates ranging from 0.001 s−1 to 1 s−1 and the height reduction is around 50%. Essentially, the flow stress-strain curve of isothermal compression in α + β field exhibits a flow softening feature when the strain rate is higher than 0.1 s−1 as while it exhibits a steady-state feature as the strain rate is lower than 0.1 s−1. The peak stress increases with a decrease in deformation temperature and the increase of strain rate. The activation energy for deformation in α + β field was calculated and the average activation energy of 271.1 kJ/mol. The microstructure observation reveals that the isothermal deformation in the α + β field of the alloy is mainly controlled by the dynamic recovery mechanism accompanied with the secondary dynamic recrystallizitation of β phase. The α phase shows an obvious pinning effect for the movement of dislocations. During deformation, the α phase was elongated and fragmented. |
| first_indexed | 2024-12-20T04:08:59Z |
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| id | doaj.art-20bbe0a7511f410a932364a86cc55c2f |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-20T04:08:59Z |
| publishDate | 2015-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-20bbe0a7511f410a932364a86cc55c2f2022-12-21T19:53:57ZengMDPI AGMetals2075-47012015-02-015121622710.3390/met5010216met5010216Hot Deformation Behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe Alloy in α + β FieldZhaoxin Du0Shulong Xiao1Jingshun Liu2Shufeng Lv3Lijuan Xu4Fantao Kong5Yuyong Chen6School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaNational Key Laboratory of Science and Technology on Precision Heat Processing of Metals, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaSchool of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaNational Key Laboratory of Science and Technology on Precision Heat Processing of Metals, Harbin Institute of Technology, Harbin 150001, ChinaNational Key Laboratory of Science and Technology on Precision Heat Processing of Metals, Harbin Institute of Technology, Harbin 150001, ChinaNational Key Laboratory of Science and Technology on Precision Heat Processing of Metals, Harbin Institute of Technology, Harbin 150001, ChinaThe deformation behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe high strength β titanium alloy is systematically investigated by isothermal compression in α + β field with the deformation temperatures ranging from 1003 K to 1078 K, the strain rates ranging from 0.001 s−1 to 1 s−1 and the height reduction is around 50%. Essentially, the flow stress-strain curve of isothermal compression in α + β field exhibits a flow softening feature when the strain rate is higher than 0.1 s−1 as while it exhibits a steady-state feature as the strain rate is lower than 0.1 s−1. The peak stress increases with a decrease in deformation temperature and the increase of strain rate. The activation energy for deformation in α + β field was calculated and the average activation energy of 271.1 kJ/mol. The microstructure observation reveals that the isothermal deformation in the α + β field of the alloy is mainly controlled by the dynamic recovery mechanism accompanied with the secondary dynamic recrystallizitation of β phase. The α phase shows an obvious pinning effect for the movement of dislocations. During deformation, the α phase was elongated and fragmented.http://www.mdpi.com/2075-4701/5/1/216β titanium alloysactivation energymicrostructure evolutiondeformation mechanism |
| spellingShingle | Zhaoxin Du Shulong Xiao Jingshun Liu Shufeng Lv Lijuan Xu Fantao Kong Yuyong Chen Hot Deformation Behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe Alloy in α + β Field Metals β titanium alloys activation energy microstructure evolution deformation mechanism |
| title | Hot Deformation Behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe Alloy in α + β Field |
| title_full | Hot Deformation Behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe Alloy in α + β Field |
| title_fullStr | Hot Deformation Behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe Alloy in α + β Field |
| title_full_unstemmed | Hot Deformation Behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe Alloy in α + β Field |
| title_short | Hot Deformation Behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe Alloy in α + β Field |
| title_sort | hot deformation behavior of ti 3 5al 5mo 6v 3cr 2sn 0 5fe alloy in α β field |
| topic | β titanium alloys activation energy microstructure evolution deformation mechanism |
| url | http://www.mdpi.com/2075-4701/5/1/216 |
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