Dynamic properties of alumina hollow particle filled aluminum alloy A356 matrix syntactic foams

被引:77
作者
Licitra, Luca [1 ]
Luong, Dung D. [1 ]
Strbik, Oliver M., III [2 ]
Gupta, Nikhil [1 ]
机构
[1] NYU, Polytech Sch Engn, Dept Mech & Aerosp Engn, Composite Mat & Mech Lab, Brooklyn, NY 11201 USA
[2] Deep Springs Technol LLC, Toledo, OH 43615 USA
关键词
Aluminum alloy; Alumina hollow particle; Syntactic foam; Dynamic properties; Compression; COMPRESSIVE DEFORMATION-BEHAVIOR; STRAIN-RATE; MECHANICAL-PROPERTIES; CERAMIC MICROSPHERES; COMPOSITES; FAILURE; DENSITY; RATES;
D O I
10.1016/j.matdes.2014.03.041
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Dynamic properties of two aluminum alloy A356/alumina hollow particle syntactic foams that have densities of 1.61 and 2.11 g/cc are studied. The materials are characterized for quasi-static (10 (3) s (1)) and high strain rate (445-910 s (1)) compression. The results show that the lower density syntactic foam has lower modulus, compressive strength and plateau stress, but the lower density provides better specific properties than either the A356 alloy and higher density syntactic foam. The fracture mechanism of the syntactic foams was investigated by using high speed cameras. The particle failure is found to initiate the failure in the specimen, followed by shear failure of the matrix and particles. The A356 alloy and syntactic foams are also characterized for their dynamic mechanical properties to understand the effect of temperature and loading frequency on the storage and loss moduli and damping parameter. The storage modulus of A356 matrix and syntactic foams decreases but the loss modulus and damping parameter increase as the temperature increases. At the same temperature, the lower density material has lower storage modulus and loss modulus. The storage modulus of A356 alloy decreases steeply as the temperature is increased above 375 degrees C, whereas syntactic foams demonstrate better thermal stability. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:504 / 515
页数:12
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