Grain growth behavior of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy during isothermal β heat treatments
| Autor: | Shi-Qiang Lu, Hai-ming Du, Xian-Juan Dong, Xia Cui, De-lai Ouyang |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
020502 materials Kinetics Alloy Metallurgy Metals and Alloys Thermodynamics 02 engineering and technology Activation energy engineering.material Condensed Matter Physics Isothermal process Growth time Grain size Grain growth 0205 materials engineering Materials Chemistry engineering Physical and Theoretical Chemistry Holding time |
| Zdroj: | Rare Metals. 38:233-237 |
| ISSN: | 1867-7185 1001-0521 |
| Popis: | Isothermal β heat treatments of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy were performed at the temperature of 1040–1240 °C to examine the influence of heating conditions on grain growth of the alloy. The results show that the grain size increases with heating temperature and holding time increasing. Rapid β grain growth of the alloy takes place at the temperature of over 1140 °C. The grain growth kinetics for the alloy follows the classical isothermal grain growth law. The growth time exponent (n) of 0.5651 and activation energy (Q) of 129.6 kJ·mol−1 are determined. Finally, in order to determine the grain size under different heating conditions, the grain growth model of the alloy was established. |
| Databáze: | OpenAIRE |
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