Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 22    No. 2    December 2012

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Compressive property and energy absorption characteristic of 3D open-cell Ni-Cr-Fe alloy foams under quasi-static conditions
PANG Qiu1, WU Gao-hui1, 2, SUN Dong-li1, XIU Zi-yang1, 2, ZHANG Qiang1, HU Zhi-li2, 3

1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;
3. National Key Laboratory of Precision Hot Processing of Metals, Harbin Institute of Technology,
Harbin 150001, China

Abstract:Reticulated open-cell Ni-Cr-Fe foams were manufactured by gas-phase codeposition of Cr and Fe onto the struts of pure Ni foam at 1050 °C, and then the samples were homogenization treated at 1200 °C in a vacuum atmosphere. The quasi-static compressive behavior and energy absorption characteristics of the Ni-Cr-Fe alloy foams with different Cr and Fe contents were discussed. The mechanical properties of these open-cell Ni-Cr-Fe alloy foams were also comparable with the pure Ni foams or the hypothetical Ni-Cr-Fe foam model. The results show that although the alloy foam struts show the similar hardness, the compressive strengths and energy absorption properties of the open-cell Ni-Cr-Fe alloy foams increase with increasing the Cr and Fe contents. The stress-strain behaviours of the Ni-Cr-Fe alloy foams are as smooth as those of nickel foams, indicating that the Ni-Cr-Fe alloy foams are the characteristic of typical ductile metallic foam. The energy absorption capabilities of the Ni-Cr-Fe alloy foams exhibit 22 times higher than that of the pure Ni foams. Simultaneously, the compressive strength of the Ni-Cr-Fe alloy foams at ambient temperature is in agreement with theoretical prediction by Gibson-Ashby model.

 

Key words: metallic foam; Ni foam; vapour deposition; coating; heat treatment; pack cementation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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