کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
787480 1465675 2009 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A dislocation density based material model to simulate the anisotropic creep behavior of single-phase and two-phase single crystals
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
A dislocation density based material model to simulate the anisotropic creep behavior of single-phase and two-phase single crystals
چکیده انگلیسی

The primary and secondary creep behavior of single crystals is observed by a material model using evolution equations for dislocation densities on individual slip systems. An interaction matrix defines the mutual influence of dislocation densities on different glide systems. Face-centered cubic (fcc), body-centered cubic (bcc) and hexagonal closed packed (hcp) lattice structures have been investigated. The material model is implemented in a finite element method to analyze the orientation dependent creep behavior of two-phase single crystals. Three finite element models are introduced to simulate creep of a γ′ strengthened nickel base superalloy in 〈1 0 0〉, 〈1 1 0〉 and 〈1 1 1〉 directions. This approach allows to examine the influence of crystal slip and cuboidal microstructure on the deformation process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 25, Issue 5, May 2009, Pages 973–994
نویسندگان
, , , , ,