Improving strength and ductility of Ti-4Al-0.005B titanium alloy through tailoring equiaxed and lamellar microstructure during thermal mechanical process
The Ti-4Al-0.005B alloy were rolled at 940 °C or 990 °C followed by annealing at 650 °C. In order to control the final microstructure, rolling at medium temperature of 550 °C was processed in two other plates after rolling at 940 °C or 990 °C. The rolling and tensile behaviors of Ti-4Al-0.005B alloy...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422013473 |
| _version_ | 1818018096701505536 |
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| author | Kai Li Huiqun Liu Ningjie Gu Xiang Xiao Shan Dai Jiatao Liu Danqing Yi |
| author_facet | Kai Li Huiqun Liu Ningjie Gu Xiang Xiao Shan Dai Jiatao Liu Danqing Yi |
| author_sort | Kai Li |
| collection | DOAJ |
| description | The Ti-4Al-0.005B alloy were rolled at 940 °C or 990 °C followed by annealing at 650 °C. In order to control the final microstructure, rolling at medium temperature of 550 °C was processed in two other plates after rolling at 940 °C or 990 °C. The rolling and tensile behaviors of Ti-4Al-0.005B alloy with equiaxed and lamellar microstructure are comparatively studied using electron backscatter diffraction (EBSD) technique. It is found that the grain refinement mechanism of 940 °C and 940 + 550 °C rolled samples is continuous dynamic recrystallization (CDRX), while the 990 + 550 °C samples combine CDRX and twinning. The strong basal/near basal textures (B/N textures) in 940 °C and 940 + 550 °C rolled samples was mainly related to basal slip and pyramidal <c+a> slip. Strong transverse textures (T-type texture) formed in 990 °C rolled sample due to variant selection during the β→α phase transformation and 990 + 550 °C rolled sample exhibits a mixed of T-type texture and B/N texture. The 990 + 550 °C rolled sample exhibited a best mechanical properties combined of strength and ductility due to its mixed texture and refined α grains. |
| first_indexed | 2024-04-14T07:35:39Z |
| format | Article |
| id | doaj.art-30b2c259e59d48d9894fa84a6b19e7c4 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-14T07:35:39Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-30b2c259e59d48d9894fa84a6b19e7c42022-12-22T02:05:42ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012031583172Improving strength and ductility of Ti-4Al-0.005B titanium alloy through tailoring equiaxed and lamellar microstructure during thermal mechanical processKai Li0Huiqun Liu1Ningjie Gu2Xiang Xiao3Shan Dai4Jiatao Liu5Danqing Yi6Chinalco Materials Application Research Institute Co., Ltd, Beijing, 102209, China; Corresponding author.School of Materials Science and Engineering, Central South University, Changsha 410083, China; State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China; Corresponding author.Chinalco Materials Application Research Institute Co., Ltd, Beijing, 102209, ChinaChinalco Materials Application Research Institute Co., Ltd, Beijing, 102209, ChinaChinalco Shenyang Non-ferrous Metals Processing Co., Ltd, Shenyang, 110100, ChinaChinalco Shenyang Non-ferrous Metals Processing Co., Ltd, Shenyang, 110100, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaThe Ti-4Al-0.005B alloy were rolled at 940 °C or 990 °C followed by annealing at 650 °C. In order to control the final microstructure, rolling at medium temperature of 550 °C was processed in two other plates after rolling at 940 °C or 990 °C. The rolling and tensile behaviors of Ti-4Al-0.005B alloy with equiaxed and lamellar microstructure are comparatively studied using electron backscatter diffraction (EBSD) technique. It is found that the grain refinement mechanism of 940 °C and 940 + 550 °C rolled samples is continuous dynamic recrystallization (CDRX), while the 990 + 550 °C samples combine CDRX and twinning. The strong basal/near basal textures (B/N textures) in 940 °C and 940 + 550 °C rolled samples was mainly related to basal slip and pyramidal <c+a> slip. Strong transverse textures (T-type texture) formed in 990 °C rolled sample due to variant selection during the β→α phase transformation and 990 + 550 °C rolled sample exhibits a mixed of T-type texture and B/N texture. The 990 + 550 °C rolled sample exhibited a best mechanical properties combined of strength and ductility due to its mixed texture and refined α grains.http://www.sciencedirect.com/science/article/pii/S2238785422013473Titanium alloysHot rolledTextureTensile properties |
| spellingShingle | Kai Li Huiqun Liu Ningjie Gu Xiang Xiao Shan Dai Jiatao Liu Danqing Yi Improving strength and ductility of Ti-4Al-0.005B titanium alloy through tailoring equiaxed and lamellar microstructure during thermal mechanical process Journal of Materials Research and Technology Titanium alloys Hot rolled Texture Tensile properties |
| title | Improving strength and ductility of Ti-4Al-0.005B titanium alloy through tailoring equiaxed and lamellar microstructure during thermal mechanical process |
| title_full | Improving strength and ductility of Ti-4Al-0.005B titanium alloy through tailoring equiaxed and lamellar microstructure during thermal mechanical process |
| title_fullStr | Improving strength and ductility of Ti-4Al-0.005B titanium alloy through tailoring equiaxed and lamellar microstructure during thermal mechanical process |
| title_full_unstemmed | Improving strength and ductility of Ti-4Al-0.005B titanium alloy through tailoring equiaxed and lamellar microstructure during thermal mechanical process |
| title_short | Improving strength and ductility of Ti-4Al-0.005B titanium alloy through tailoring equiaxed and lamellar microstructure during thermal mechanical process |
| title_sort | improving strength and ductility of ti 4al 0 005b titanium alloy through tailoring equiaxed and lamellar microstructure during thermal mechanical process |
| topic | Titanium alloys Hot rolled Texture Tensile properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422013473 |
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