کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7971794 | 1514612 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of oxygen content on active deformation systems in pure titanium polycrystals
ترجمه فارسی عنوان
اثر محتوای اکسیژن بر سیستم های تغییر شکل فعال در پلی کریستال های تیتانیوم خالص
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
The Ti-0.1â¯wt% O and Ti-0.3â¯wt% O polycrystals were compressed along the extrusion direction and the incidence of different deformation modes were evaluated by electron backscattered diffraction (EBSD)-assisted slip trace analysis. It was found that a transition from single prismatic slip in Ti-0.1O to double prismatic slip or multiple slip in Ti-0.3O polycrystals dominated flow was observed. The reason for such transition was associated with the decreasing of CRSSpyramidal/CRSSprismatic ratio and the increasing of c/a ratio as the oxygen content increasing. Meanwhile, the deformation twins were less observed in Ti-0.3O than that in Ti-0.1O polycrystals, and all the characterized deformation twins were {101Ì
2}ã1Ì
011ã. Interestingly, because the influence of the grain orientation and high local stress concentrations, {101Ì
2}ã1Ì
011ã twins with lower Schmid factor (SF) than that of prismatic slip were often activated in Ti-0.1O polycrystals. As the oxygen content increases, the interaction between the solute oxygen and the core of crew dislocation was enhanced, and the mobility of the dislocation becomes difficult. As a consequence, the compressive yield stress of Ti-0.3O was about 2.5 times that of Ti-0.1O polycrystals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 731, 25 July 2018, Pages 530-538
Journal: Materials Science and Engineering: A - Volume 731, 25 July 2018, Pages 530-538
نویسندگان
J.Q. Ren, Q. Wang, X.F. Lu, W.F. Liu, P.L. Zhang, X.B. Zhang,