کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
831531 908106 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Metallographic study of non-homogenous armour impacted by armour-piercing incendiary ammunition
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Metallographic study of non-homogenous armour impacted by armour-piercing incendiary ammunition
چکیده انگلیسی

In this paper, the influence of impact and incendiary effect on the microstructure changes and crack development in non-homogenous add-on armour is studied. The main objective was to determine the parameters that may cause the yielding of the material, leading to a possible decrease in multi-hit resistance. For that purpose, patented wire fence and perforated plates made from two types of high strength steel, Hardox 450 and 50CrV4 tempered at 170 °C were tested. Various techniques were applied: high speed video camera was used, visual macroanalysis, light microscopy, scanning electron microscopy and energy dispersive X-ray analysis. It was found that incendiary effect, being of a brief nature, does not have any influence on microstructure of the add-on armour. However, impact greatly influences crack development and propagation, which occurs in 50CrV4 steel, the material with lower ductility, diminishing its multi-hit resistance. In accordance with obtained results, non-homogenous add-on armour behaviour models were devised, describing the influence of material ductility and geometry on fracture mode, stresses and deformability.


► Incendiary effect does not influence the changes in microstructure.
► Impact causes plastic deformation in more ductile materials.
► Impact causes shear crack instability in less ductile materials.
► Crack propagation influences chipping on the inside of the perforated plate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 32, Issue 7, August 2011, Pages 4022–4029
نویسندگان
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