Effects of cryogenic pre-deformation on the microstructure and mechanical properties of Ti–Mo alloys
In the present study, pre-deformation at liquid nitrogen temperature (77 K) was applied to introduce twins into Ti–Mo alloys with different contents of molybdenum. The microstructural evolution and mechanical properties with different cryogenic pre-deformation amounts (from 0 to 9 %) were characteri...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542400557X |
| _version_ | 1797247828290961408 |
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| author | Yixiong Hu Fulin Chen Shikun Zhang Fuli He Sihui Ouyang Fei Peng Zhenggang Wu Weidong Zhang |
| author_facet | Yixiong Hu Fulin Chen Shikun Zhang Fuli He Sihui Ouyang Fei Peng Zhenggang Wu Weidong Zhang |
| author_sort | Yixiong Hu |
| collection | DOAJ |
| description | In the present study, pre-deformation at liquid nitrogen temperature (77 K) was applied to introduce twins into Ti–Mo alloys with different contents of molybdenum. The microstructural evolution and mechanical properties with different cryogenic pre-deformation amounts (from 0 to 9 %) were characterized and analyzed. The results show that the twinning activities and the evolution of twinning systems are mainly influenced by β phase stability and cryogenic pre-deformation amount. After cryogenic pre-deformation, the primary and secondary twinning of {332}<113>twins are observed in Ti–12Mo and Ti–15Mo alloys but absent in Ti–20Mo alloy. With the cryogenic pre-deformation amounts increasing, the width and quantity of twins increase constantly. Moreover, {112}<111>twinning is activated in Ti–15Mo alloy pre-deformed by 6 % and 9 %. Twins and high-density dislocations induced by cryogenic pre-deformation cause a significant enhancement in strength of all these three alloys. However, the effect of cryogenic pre-deformation on the elongation of alloys is complicated. For Ti–12Mo alloys, the yield strength increases monotonically (from 527 to 778 MPa) with the increase of cryogenic pre-deformation reduction, while the elongation is completely opposite (from 47 to 20 %). For Ti–15Mo alloys, the optimal matching of strength and ductility is achieved when the amount of cryogenic pre-deformation is 6 %, with a tensile strength of 815 MPa and an elongation of 24 %. Compared with the other two alloys, Ti–20Mo alloy gets a smaller increase in strength and a slight decrease in elongation with the amount of cryogenic pre-deformation increasing. |
| first_indexed | 2024-04-24T20:04:54Z |
| format | Article |
| id | doaj.art-beade25c2262444eac6cf1877926110b |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:04:54Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-beade25c2262444eac6cf1877926110b2024-03-24T06:58:59ZengElsevierJournal of Materials Research and Technology2238-78542024-03-012954255436Effects of cryogenic pre-deformation on the microstructure and mechanical properties of Ti–Mo alloysYixiong Hu0Fulin Chen1Shikun Zhang2Fuli He3Sihui Ouyang4Fei Peng5Zhenggang Wu6Weidong Zhang7College of Materials Science and Engineering, Hunan University, Changsha, 410082, ChinaCollege of Materials Science and Engineering, Hunan University, Changsha, 410082, ChinaCollege of Materials Science and Engineering, Hunan University, Changsha, 410082, ChinaState Key Laboratory of Special Rare Metal Materials, Northwest Rare Metal Materials Research Institute Ningxia Co., Ltd, Shizuishan, 753000, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing, 400044, China; Corresponding author. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.College of Materials Science and Engineering, Hunan University, Changsha, 410082, ChinaCollege of Materials Science and Engineering, Hunan University, Changsha, 410082, ChinaCollege of Materials Science and Engineering, Hunan University, Changsha, 410082, China; Corresponding author.In the present study, pre-deformation at liquid nitrogen temperature (77 K) was applied to introduce twins into Ti–Mo alloys with different contents of molybdenum. The microstructural evolution and mechanical properties with different cryogenic pre-deformation amounts (from 0 to 9 %) were characterized and analyzed. The results show that the twinning activities and the evolution of twinning systems are mainly influenced by β phase stability and cryogenic pre-deformation amount. After cryogenic pre-deformation, the primary and secondary twinning of {332}<113>twins are observed in Ti–12Mo and Ti–15Mo alloys but absent in Ti–20Mo alloy. With the cryogenic pre-deformation amounts increasing, the width and quantity of twins increase constantly. Moreover, {112}<111>twinning is activated in Ti–15Mo alloy pre-deformed by 6 % and 9 %. Twins and high-density dislocations induced by cryogenic pre-deformation cause a significant enhancement in strength of all these three alloys. However, the effect of cryogenic pre-deformation on the elongation of alloys is complicated. For Ti–12Mo alloys, the yield strength increases monotonically (from 527 to 778 MPa) with the increase of cryogenic pre-deformation reduction, while the elongation is completely opposite (from 47 to 20 %). For Ti–15Mo alloys, the optimal matching of strength and ductility is achieved when the amount of cryogenic pre-deformation is 6 %, with a tensile strength of 815 MPa and an elongation of 24 %. Compared with the other two alloys, Ti–20Mo alloy gets a smaller increase in strength and a slight decrease in elongation with the amount of cryogenic pre-deformation increasing.http://www.sciencedirect.com/science/article/pii/S223878542400557XTitanium alloyCryogenic pre-deformationTwinMechanical properties |
| spellingShingle | Yixiong Hu Fulin Chen Shikun Zhang Fuli He Sihui Ouyang Fei Peng Zhenggang Wu Weidong Zhang Effects of cryogenic pre-deformation on the microstructure and mechanical properties of Ti–Mo alloys Journal of Materials Research and Technology Titanium alloy Cryogenic pre-deformation Twin Mechanical properties |
| title | Effects of cryogenic pre-deformation on the microstructure and mechanical properties of Ti–Mo alloys |
| title_full | Effects of cryogenic pre-deformation on the microstructure and mechanical properties of Ti–Mo alloys |
| title_fullStr | Effects of cryogenic pre-deformation on the microstructure and mechanical properties of Ti–Mo alloys |
| title_full_unstemmed | Effects of cryogenic pre-deformation on the microstructure and mechanical properties of Ti–Mo alloys |
| title_short | Effects of cryogenic pre-deformation on the microstructure and mechanical properties of Ti–Mo alloys |
| title_sort | effects of cryogenic pre deformation on the microstructure and mechanical properties of ti mo alloys |
| topic | Titanium alloy Cryogenic pre-deformation Twin Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S223878542400557X |
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