کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
800427 1467557 2006 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The influence of particle distribution and volume fraction on the post-necking behaviour of aluminium alloys
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
The influence of particle distribution and volume fraction on the post-necking behaviour of aluminium alloys
چکیده انگلیسی

Experimental observations show that the continuous cast (CC) Al–Mg alloy with 0.21 wt% Fe has a considerably lower fracture strain than that of a CC alloy with 0.08 wt% Fe and a direct chill cast (DC) alloy with 0.21% Fe. However, the forming limit strains are almost the same for the three alloys. The similarities and differences are thought to relate with the distribution of hard second-phase particles. In the present paper, the influence of particle distribution characteristics (random vs. stringer pattern) and volume fraction (1.2% vs. 3.5%) is examined in detail with the use of a simple plane stress finite element unit cell model. The model permits extension of the composite stress–strain curve beyond the diffuse necking condition so that the nominally uniform response is followed directly by localized necking. The model results agree very well with tensile tests with respect to the differing behaviour of the three materials in the deformation range between the onset of diffuse necking and that for localized necking.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanics of Materials - Volume 38, Issue 11, November 2006, Pages 1026–1038
نویسندگان
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