کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1573504 | 1514682 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructural evolution and deformation mode under high-temperature-tensile-deformation of the Ti-6Al-4V alloy with the metastable αⲠmartensite starting microstructure
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ti-6Al-4V alloy having the metastable αⲠmartensite starting microstructure was investigated for microstructural changes during high-temperature-tensile-deformation at temperatures from 700 °C to 900 °C. As compared to the deformation of Ti-6Al-4V alloy with similar lamellar morphology consisting of an equilibrium (α+β) phase, the quite larger elongation to fracture and the higher strain-rate-sensitivity (m) are exhibited in the case of the αⲠmartensite starting microstructure. The dynamic globularization associated with an occurrence of the discontinuous dynamic recrystallization is enhanced during tensile deformation of the αⲠmartensite starting microstructure, resulting in the activation of grain boundary sliding at latter stage of deformation (which contributes to an increase in tensile elongation). Furthermore, dynamic β precipitation from the αⲠmartensite during deformation also results in contribution to an additional stress-accommodation mechanism. As compared to the case in the equilibrium (α+β) lamellar microstructure, the present work indicates that the metastable microstructure of the αⲠmartensite starting microstructure is more beneficial for an enhancement of high temperature ductility associated with enhancement of dynamic globularization and an occurrence of boundary sliding.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 661, 20 April 2016, Pages 68-78
Journal: Materials Science and Engineering: A - Volume 661, 20 April 2016, Pages 68-78
نویسندگان
Hiroaki Matsumoto, Takuro Nishihara, Yohei Iwagaki, Tohru Shiraishi, Yoshiki Ono, Akihiko Chiba,