Academic Journal
Effect of Cooling Rate on α Variant Selection and Microstructure Evolution in TB17 Titanium Alloy.
| العنوان: | Effect of Cooling Rate on α Variant Selection and Microstructure Evolution in TB17 Titanium Alloy. |
|---|---|
| المؤلفون: | Shang, Guoqiang1,2 (AUTHOR) nansmily@126.com, Gan, Xueping1 (AUTHOR) 203301071@csu.edu.cn, Wang, Xinnan2 (AUTHOR) zhuzzs@126.com, Ge, Jinyang1 (AUTHOR) zhoukechao@csu.edu.cn, Li, Chao3 (AUTHOR) lc@xtjtty.com, Zhu, Zhishou2 (AUTHOR), Zhang, Xiaoyong1 (AUTHOR) ganxueping@csu.edu.cn, Zhou, Kechao1 (AUTHOR) |
| المصدر: | Materials (1996-1944). Oct2024, Vol. 17 Issue 20, p5010. 14p. |
| مصطلحات موضوعية: | *CRYSTAL grain boundaries, *PHASE transitions, *X-ray diffraction, *GRAIN farming, *MICROSTRUCTURE |
| مستخلص: | The α variant selection and microstructure evolution in a new metastable β titanium alloy TB17 were studied in depth by DTA, microhardness, XRD, SEM, and EBSD characterization methods. Under the rapid cooling rate conditions (150 °C/min–400 °C/min), only a very small amount of granular αWM (α Widmanstatten precipitates within the grains) precipitated within the grains. The secondary α phase precipitated in the alloy changed from granular to fine needle-like at moderate cooling rates (15 °C/min–20 °C/min). When continuing to slow down the cooling rates (10 °C/min and 1 °C/min), the αGB (α precipitates along the β grain boundaries), αWGB (α Widmanstatten precipitates that developed from β grain boundaries or αGB) and αWM grew rapidly. Moreover, the continuous cooling transformation (CCT) diagram illustrated the effect of cooling rate on the β/α phase transition. EBSD analysis revealed that the variants selection of α near the original β grain boundary is mainly divided into three categories. (i) The double-BOR (Burgers orientation relationship) αWGB colonies within neighboring β grains grow in different directions but have the same crystallographic orientation. (ii) The double-BOR αWGB colonies within neighboring β grains have different growth directions and different crystallographic orientations. (iii) The double-BOR αWGB colonies within the same grain have the same growth direction, but different crystallographic directions. And these double-BOR αWGB colonies correspond to two variants of the given {0001}α//{110}β. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: | Academic Search Index |
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