کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7992595 | 1516148 | 2018 | 45 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the compressive deformation behavior of new beta titanium alloys designed by d-electron method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Three beta titanium alloys in the Ti-Al-Mo-Cr-V system have been designed using the d-electron method with the aim of activating different combinations of deformation mechanisms. In this regard Ti-4Al-7Mo-3V-3Cr (Ti-4733), Ti-3Al-5Mo-7V-3Cr (Ti-3573) and Ti-3Al-8Mo-7V-3Cr (Ti-3873) alloys have been designed and compared with a commercial Ti-5Al-5Mo-5V-3Cr (Ti-5553) alloy. To evaluate the accuracy of the d-electron theoretical predictions, uniaxial compression tests were performed at room temperature. Different characterization methods including X-ray diffraction, electron backscatter diffraction, optical and transmission electron microscopy were used to investigate the microstructural evolution and deformation mechanisms. As a result of the modified deformation mechanisms, all the designed alloys showed enhanced compressive properties in comparison to the Ti-5553 alloy in beta single phase state. It was found that with increasing stability of the beta phase, the deformation mechanism of the new Ti-alloys gradually changes from slip + stress-induced martensitic transformation to slip + stress-induced martensitic transformation + mechanical twinning and finally to slip + mechanical twinning. The results showed that in the case of twinning the prediction by the d-electron method is consistent with experimental observations whereas regarding the stress-induced martensitic transformation this method should be used with considering an expanded martensite region on the lower portion of the d-electron phase stability map.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 746, 25 May 2018, Pages 206-217
Journal: Journal of Alloys and Compounds - Volume 746, 25 May 2018, Pages 206-217
نویسندگان
S. Sadeghpour, S.M. Abbasi, M. Morakabati, A. Kisko, L.P. Karjalainen, D.A. Porter,