کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7174825 1465569 2018 24 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Slip transfer across phase boundaries in dual phase titanium alloys and the effect on strain rate sensitivity
ترجمه فارسی عنوان
انتقال لغزش بین مرزهای فاز در آلیاژهای تیتانیوم دوگانه و تاثیر آن بر حساسیت نرخ کرنش
کلمات کلیدی
انتقال جابجایی، حساسیت نرخ فشار، تیتانیوم فاز دوگانه، انعطاف پذیری گسسته پلاستیک کریستال،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
Dislocation transmission through α/β phase boundaries in titanium alloys is studied using integrated crystal plasticity (CP) and discrete dislocation plasticity (DDP) modelling techniques, combined with experimental micro-pillar compression test results. Direct dislocation transmission together with the nucleation of new dislocations ahead of a pile-up at an α/β interface, termed indirect slip transfer, are both assessed and their role in controlling microstructure-dependent strain rate sensitivity considered. A critical shear stress criterion for direct slip transfer across an α/β interface in Ti-6242 has been established by capturing the local slip penetration through the phase boundary using CP and DDP comparisons with experimental two phase micro-pillar compression. The competition between direct and indirect slip transfer has been investigated using a single Frank-Read source DDP model. Direct slip transfer is found to occur only under specific conditions which have been quantified. The strain rate sensitivity of dual phase titanium alloys is demonstrated to depend on average pile-up size which is significantly influenced by α/β morphology.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 104, May 2018, Pages 23-38
نویسندگان
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