|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|1640897||1517203||2016||3 صفحه PDF||سفارش دهید||دانلود کنید|
• Crushing, shear fracture and Griffith rupture observed as main failure mechanisms.
• H/D ratio is the main governing factor which favor rupture or shear fracture.
• t/D is the parameter which controls crushing of cells or shear fracture of TMFs.
Deformation and failure mechanism of A356 matrix tailor-made metallic foams (TMFs) with variety of sample aspect ratio (H/D), cell wall thickness to the diameter (t/D) and density was studied under quasi-static compressive loading. Four distinct deformation sections were characterized in the stress strain curves; elastic, initiation of plastic, plastic and densification. The plastic deformation of TMFs before crack initiation increases with increase of t/D ratio and density of the TMFS. Likewise, stress drop due to formation of cracks shows a direct relation to the t/D and density. Crushing of spheres, shear fracture and Griffith rupture were observed as main failure mechanisms in A356 matrix TMFs. It was seen that the H/D ratio of the samples is the main governing factor that favors rupture or shear fracture while t/D controls crushing of cells or shear fracture of A356 matrix TMFs.
Journal: Materials Letters - Volume 185, 15 December 2016, Pages 89–91