کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1579528 | 1514829 | 2010 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of the high pressure torsion die geometry on the allotropic phase transformations in pure Zr
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Influence of the high pressure torsion die geometry on the allotropic phase transformations in pure Zr Influence of the high pressure torsion die geometry on the allotropic phase transformations in pure Zr](/preview/png/1579528.png)
چکیده انگلیسی
The effect of the press geometry in the α to Ï + β transformation in pure Zr by high pressure torsion (HPT) was investigated. Specimens were processed in constrained and unconstrained setups using a wide range of applied pressures and 5 anvil turns. The resulting microstructures were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM and HRTEM) and electron backscatter diffraction (EBSD). Microhardness distributions were measured for each condition. The transformation kinetics and the stability of the fabricated nanostructures are enhanced when using an unconstrained setup. In the samples processed by constrained HPT the full transformation does not take place even at the highest pressures applied. Additionally, post-processing room temperature grain growth of some of the remaining nanocrystalline α-Zr grains with (0 0 0 1) orientations occurs, leading to a significant decrease in hardness. HRTEM allowed confirming the presence of pure β-Zr.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issues 16â17, 25 June 2010, Pages 3918-3928
Journal: Materials Science and Engineering: A - Volume 527, Issues 16â17, 25 June 2010, Pages 3918-3928
نویسندگان
A.P. Zhilyaev, F. Gálvez, A. Sharafutdinov, M.T. Pérez-Prado,