کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9796641 1514950 2005 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Plasticity and damage in aluminum syntactic foams deformed under dynamic and quasi-static conditions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Plasticity and damage in aluminum syntactic foams deformed under dynamic and quasi-static conditions
چکیده انگلیسی
Syntactic foams were fabricated by liquid metal infiltration of commercially pure and 7075 aluminum into preforms of hollow ceramic microspheres. The foams exhibited peak strengths during quasi-static compression ranging from −100 to −230 MPa, while dynamic compression loading showed a 10-30% increase in peak strength magnitude, with strain rate sensitivities similar to those of aluminum-matrix composite materials. X-ray tomographic investigation of the post-compression loaded foam microstructures revealed sharp differences in deformation modes, with the unalloyed-Al foam failing initially by matrix deformation, while the alloy-matrix foams failed more abruptly through the formation of sharp crush bands oriented at about 45° to the compression axis. These foams displayed pronounced energy-absorbing capabilities, suggesting their potential use in packaging applications or for impact protection; proper tailoring of matrix and microsphere strengths would result in optimized syntactic foam properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 391, Issues 1–2, 25 January 2005, Pages 408-417
نویسندگان
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