Microstructural evolution and creep deformation behavior of novel Ti−22Al−25Nb−1Mo−1V−1Zr−0.2Si (at.%) orthorhombic alloy
| Autor: | Yong-sheng He, Lai Yunjin, Tao He, Yu-jun Du, Wen-zhong Luo, Xiang-hong Liu, Hu Rui |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Alloy Metals and Alloys engineering.material Geotechnical Engineering and Engineering Geology Condensed Matter Physics Microstructure Mole fraction Creep Volume (thermodynamics) Phase (matter) Materials Chemistry engineering Orthorhombic crystal system Lamellar structure Composite material |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 29:313-321 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(19)64941-1 |
| Popis: | The microstructural evolution and creep deformation behavior which were adjusted and controlled by age treatment of a novel Ti−22Al−25Nb−1Mo−1V−1Zr−0.2Si (mole fraction, %) alloy, were investigated. The microstructures were obtained at different heat treatment temperatures and analyzed by SEM and TEM techniques. The creep behavior of the alloy was studied at 650 °C, 150 MPa for 100 h in air. The results showed that the initial microstructure mainly contained lath-like α2, B2, and O phases. The precipitated O phase was sensitive to aging temperature. With the aging temperature increasing, the thickness of the precipitated O phase was also increased, and the length was shortened. The creep resistance of this alloy was relevant to the morphology and volume faction of the lamellar O phase. The increase of lamellar O phase in thickness was the main reason for the improved creep properties. |
| Databáze: | OpenAIRE |
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