Plasticity and damage in aluminum syntactic foams deformed under dynamic and quasi-static conditions

被引:194
作者
Balch, DK
O'Dwyer, JG
Davis, GR
Cady, CM
Gray, GT
Dunand, DC [1 ]
机构
[1] Northwestern Univ, Evanston, IL 60201 USA
[2] Waterford Inst Technol, Waterford, Ireland
[3] Univ London, Queen Mary, London WC1E 7HU, England
[4] Los Alamos Natl Lab, Los Alamos, NM USA
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 391卷 / 1-2期
基金
英国工程与自然科学研究理事会;
关键词
syntactic foam; aluminum alloys; energy absorption dynamic compression; strain rate sensitivity; X-ray tomography;
D O I
10.1016/j.msea.2004.09.012
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
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 45degrees 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. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:408 / 417
页数:10
相关论文
共 38 条
[1]  
[Anonymous], 1990, METALS HDB
[2]  
Ashby M.F., 2000, METAL FOAMS DESIGN G
[3]  
Ashby M. F., 1997, CELLULAR SOLIDS STRU, DOI DOI 10.1017/CBO9781139878326
[4]  
Balch DK, 2002, PROCESSSING AND PROPERTIES OF LIGHTWEIGHT CELLULAR METALS AND STRUCTURES, P251
[5]   Manufacture, characterisation and application of cellular metals and metal foams [J].
Banhart, J .
PROGRESS IN MATERIALS SCIENCE, 2001, 46 (06) :559-U3
[6]   Compressive deformation and yielding mechanisms in cellular Al alloys determined using X-ray tomography and surface strain mapping [J].
Bart-Smith, H ;
Bastawros, AF ;
Mumm, DR ;
Evans, AG ;
Sypeck, DJ ;
Wadley, HNG .
ACTA MATERIALIA, 1998, 46 (10) :3583-3592
[7]   Experimental analysis of deformation mechanisms in a closed-cell aluminum alloy foam [J].
Bastawros, AF ;
Bart-Smith, H ;
Evans, AG .
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 2000, 48 (02) :301-322
[8]   MANUFACTURE AND COMPRESSION PROPERTIES OF SYNTACTIC FOAMS [J].
BUNN, P ;
MOTTRAM, JT .
COMPOSITES, 1993, 24 (07) :565-571
[9]   High strain rate compression of closed-cell aluminium foams [J].
Dannemann, KA ;
Lankford, J .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 293 (1-2) :157-164
[10]   High definition X-ray microtomography using a conventional impact X-ray source [J].
Davis, GR ;
Elliott, JC .
JOURNAL DE PHYSIQUE IV, 2003, 104 :131-134