کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1608840 | 1516250 | 2015 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of partitioning on the growth of intragranular α in near-β Ti alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The influence of partitioning on the growth of intragranular α in near-β Ti alloys The influence of partitioning on the growth of intragranular α in near-β Ti alloys](/preview/png/1608840.png)
چکیده انگلیسی
We report on partitioning of alloying elements during the formation of fine intragranular α plates in a Ti-55521 alloy after thermo-mechanical processing (TMP) and isothermal ageing at 923 K. The microstructures were characterised using atom probe tomography and high-resolution transmission electron microscopy. The partitioning of Mo, V and Al are strongly affected by their diffusivities and their mutual interaction. This leads to a deviation of the measured contents of alloying elements in the two phases from the predicted equilibrium values. The alloying elements at the broad faces and tips of α plates were found to exhibit different pile-up and segregation behaviours, which is thought to affect the lengthening and thickening kinetics of the α plates. As a result, the aspect ratio of α plates decreased rapidly with increasing ageing time. This study suggests that careful selection of alloying elements could be an effective way in controlling the growth anisotropy of α plates and thus α + β microstructures in near-β Ti alloys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 643, 15 September 2015, Pages 212-222
Journal: Journal of Alloys and Compounds - Volume 643, 15 September 2015, Pages 212-222
نویسندگان
Tong Li, Mansur Ahmed, Gang Sha, Rongpei Shi, Gilberto Casillas, Hung-Wei Yen, Yunzhi Wang, Elena V. Pereloma, Julie M. Cairney,