Micromechanical characterisation of Ni/Al hybrid foams by nano- and microindentation coupled with EBSD
Micromechanical characterisation of Ni/Al hybrid foams by nano- and microindentation coupled with EBSD
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DOI：
10.1016/j.actamat.2015.09.018
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发表时间：
2016-01-01
期刊：
影响因子：
9.4
通讯作者：
Diebels, S.
中科院分区：
文献类型：
--
作者：
Jung, A.;Chen, Z.;Diebels, S.
金属泡沫是一类非常有趣的多孔材料，通常用于轻质结构或作为能量吸收剂。镍/铝复合泡沫金属是一种新型的泡沫复合材料，它是在泡沫铝表面包覆纳米镍。由于泡沫的机械性能与其微观结构密切相关，在Ni/Al混杂泡沫中，涂层是影响泡沫机械性能的额外自由度。对于有意义的模拟材料的行为，涂层和铝支柱的材料性能的详细知识是necessary.In这项研究中，镍/铝混合泡沫的微观力学材料参数进行评估通过纳米压痕和显微压痕的镍涂层和铝支柱。压痕方法与电子背散射衍射（EBSD）相结合，以便将所确定的参数与局部晶粒结构联合收割机相结合。(C)2015 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
Metal foams are a very interesting class of cellular materials that is often used for lightweight construction or as energy absorbers. Ni/Al hybrid metal foams are a new and innovative composite foam material, consisting of nano-nickel coated aluminium foams. Since the mechanical properties of foams are strongly related to their microstructure, in Ni/Al hybrid foams, the coating is an additional degree of freedom affecting the mechanical properties of the foams. For meaningful simulations of the material behaviour, a detailed knowledge of the material properties of both the coating and the aluminnium struts is necessary.In this study, the micromechanical material parameters of Ni/Al hybrid foams are evaluated by means of nanoindentation and microindentation of the Ni coating and the Al struts. The indentation methods were coupled with electron backscatter diffraction (EBSD) in order to combine the determined parameter with the local grain structure. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.