Microstructure and Texture Evolution during Superplastic Deformation of SP700 Titanium Alloy
The superplastic tensile test was carried out on SP700 (Ti-4.5Al-3V-2Mo-2Fe) titanium alloy sheet at 760 °C by the method of maximum m value, and the microstructure characteristics were investigated to understand the deformation mechanism. The results indicated that the examined alloy showed an extr...
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MDPI AG
2022-02-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/5/1808 |
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| author | Ning Tian Wenjun Ye Xiaoyun Song Songxiao Hui |
| author_facet | Ning Tian Wenjun Ye Xiaoyun Song Songxiao Hui |
| author_sort | Ning Tian |
| collection | DOAJ |
| description | The superplastic tensile test was carried out on SP700 (Ti-4.5Al-3V-2Mo-2Fe) titanium alloy sheet at 760 °C by the method of maximum m value, and the microstructure characteristics were investigated to understand the deformation mechanism. The results indicated that the examined alloy showed an extremely fine grain size of ~1.3 μm and an excellent superplasticity with fracture elongation of up to 3000%. The grain size and the volume fraction of the β phase increased as the strain increased, accompanied by the elements’ diffusion. The β-stabilizing elements (Mo, Fe, and V) were mainly dissolved within the β phase and diffused from α to β phase furthermore during deformation. The increase in strain leads to the accumulation of dislocations, which results in the increase in the proportion of low angle grain boundaries by 15%. As the deformation process, the crystal of α grains rotated, and the texture changed, accompanied by the accumulation of dislocations. The phase boundary (α/β) sliding accommodated by dislocation slip was the predominant mechanism for SP700 alloy during superplastic deformation. |
| first_indexed | 2024-03-09T20:33:13Z |
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| id | doaj.art-9ab7cc6e46614fe5a10fc7d779941226 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T20:33:13Z |
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| spelling | doaj.art-9ab7cc6e46614fe5a10fc7d7799412262023-11-23T23:19:13ZengMDPI AGMaterials1996-19442022-02-01155180810.3390/ma15051808Microstructure and Texture Evolution during Superplastic Deformation of SP700 Titanium AlloyNing Tian0Wenjun Ye1Xiaoyun Song2Songxiao Hui3State Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, ChinaState Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, ChinaState Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, ChinaState Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, ChinaThe superplastic tensile test was carried out on SP700 (Ti-4.5Al-3V-2Mo-2Fe) titanium alloy sheet at 760 °C by the method of maximum m value, and the microstructure characteristics were investigated to understand the deformation mechanism. The results indicated that the examined alloy showed an extremely fine grain size of ~1.3 μm and an excellent superplasticity with fracture elongation of up to 3000%. The grain size and the volume fraction of the β phase increased as the strain increased, accompanied by the elements’ diffusion. The β-stabilizing elements (Mo, Fe, and V) were mainly dissolved within the β phase and diffused from α to β phase furthermore during deformation. The increase in strain leads to the accumulation of dislocations, which results in the increase in the proportion of low angle grain boundaries by 15%. As the deformation process, the crystal of α grains rotated, and the texture changed, accompanied by the accumulation of dislocations. The phase boundary (α/β) sliding accommodated by dislocation slip was the predominant mechanism for SP700 alloy during superplastic deformation.https://www.mdpi.com/1996-1944/15/5/1808SP700 titanium alloysuperplasticitymicrostructuretexturedeformation mechanism |
| spellingShingle | Ning Tian Wenjun Ye Xiaoyun Song Songxiao Hui Microstructure and Texture Evolution during Superplastic Deformation of SP700 Titanium Alloy Materials SP700 titanium alloy superplasticity microstructure texture deformation mechanism |
| title | Microstructure and Texture Evolution during Superplastic Deformation of SP700 Titanium Alloy |
| title_full | Microstructure and Texture Evolution during Superplastic Deformation of SP700 Titanium Alloy |
| title_fullStr | Microstructure and Texture Evolution during Superplastic Deformation of SP700 Titanium Alloy |
| title_full_unstemmed | Microstructure and Texture Evolution during Superplastic Deformation of SP700 Titanium Alloy |
| title_short | Microstructure and Texture Evolution during Superplastic Deformation of SP700 Titanium Alloy |
| title_sort | microstructure and texture evolution during superplastic deformation of sp700 titanium alloy |
| topic | SP700 titanium alloy superplasticity microstructure texture deformation mechanism |
| url | https://www.mdpi.com/1996-1944/15/5/1808 |
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