کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5455155 | 1514635 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In situ SEM study of tensile deformation of a near-β titanium alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, the deformation behavior of a near-β Ti-17 titanium alloy under uniaxial tension was investigated using electron backscatter diffraction (EBSD) and tensile tests with in situ scanning electron microscope (SEM) observation. It is found slip mode is the main deformation mechanism in primary α grains of Ti-17 during the tensile test. Slip systems activated were identified by performing calculations on EBSD orientation data. The results show that all the three slip systems with a-type Burgers vector, i.e. basal, prism and 1st-order pyramidal slip, could be activated in the primary α grains of Ti-17, but no a+c-type slip (2nd-order pyramidal slip) activated is observed. Analysis reveals that basal and prism slips are the dominating slip mode, while 1st-order pyramidal slip acts as a subsidiary or deviated slipping mode. For the equivalent slip systems, Schmid factor dominates the slip behavior, while for the non-equivalent slip systems, critical resolved shear stress (CRSS) must be taken into account. It is proved that CRSS for a+c-type slip is much larger than that for a-type slips (basal and prism slips) in Ti-17 alloy (at least 2.5 times that for basal slip). a-type slip remains the easiest slip to be activated even in the condition favoring a+c-type slip and suppressing a-type slip (an angle of ~10° between the tensile axis and c-axis).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 708, 21 December 2017, Pages 574-581
Journal: Materials Science and Engineering: A - Volume 708, 21 December 2017, Pages 574-581
نویسندگان
Saifei Zhang, Weidong Zeng, Qinyang Zhao, Liling Ge, Min Zhang,