کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5455759 1514646 2017 33 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Initial flow softening and restoration mechanisms of isothermally compressed Ti-5Al-2Sn-2Zr-4Mo-4Cr with basketweave microstructure
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Initial flow softening and restoration mechanisms of isothermally compressed Ti-5Al-2Sn-2Zr-4Mo-4Cr with basketweave microstructure
چکیده انگلیسی
The initial flow softening behavior and restoration mechanisms of Ti-5Al-2Sn-2Zr-4Mo-4Cr with basketweave microstructure during hot working were investigated. The stress-strain curves presented an obvious flow softening behavior at the range of strain rates from 0.0002 s−1 to 0.1 s−1. The dynamic recovery (DRC) in α and β phases was responsible for the initial flow softening rather than the rotation of α platelets to a “soft” orientation. Following this continuous dynamic recrystallization (CDRX) of α and β phases based on the DRC is the main restoration mechanism related to the following flow softening. CDRX, as the first step of fragmentation of α phase, resulted in the globularization of α platelets. The globularization fraction of α platelets increased with decreasing strain rates and rising deformation temperatures since the CDRX of α phase and the penetration of β phase were the diffusion-controlled process accelerated by the higher deformation temperatures and longer diffusion time. Furthermore, the CDRX of β grains was always linked to the kinked sharp α grains in order to coordinate the deformation from α phase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 697, 14 June 2017, Pages 132-140
نویسندگان
, , ,