کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1579460 1514831 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anisotropic fracture behavior of ultrafine-grained iron
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Anisotropic fracture behavior of ultrafine-grained iron
چکیده انگلیسی

Fracture toughness measurements with ultrafine-grained bcc iron produced by high pressure torsion (HPT) are reported. The measurements were performed with respect to three different crack plane orientations, which showed pronounced differences in fracture toughness as well as in the appearance of the fracture surfaces. The mechanical anisotropy was found to be a result of the elongated and aligned submicrocrystalline microstructure. This causes intergranular fracture for the crack plane orientation of lowest toughness, simultaneously favoring a higher fracture toughness for the other specimen orientations. Since this mechanical anisotropy led to one crack plane orientation with a limited fracture toughness, a strategy for increasing the fracture toughness of this orientation is also presented.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issues 10–11, 25 April 2010, Pages 2649–2656
نویسندگان
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