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. 27    No. 5    May 2017

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Effect of Ce content on mechanical properties of Ce/Cr coated open-cell Ni-Cr-Fe alloy foams
Qiu PANG1,2, Zhi-li HU2,3,4, Guo-rong WANG1

1. School of Mechanical and Electrical Engineering, Wuhan Donghu University, Wuhan 430212, China;
2. Hubei Key Laboratory of Advanced Technology of Automobile Components, Wuhan University of Technology, Wuhan 430070, China;
3. Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan 430070, China;
4. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

Abstract:The Ce/Cr coating was homogenously deposited onto the reticulated open-cell Ni-Cr-Fe alloy foam by the pack cementation process. The mechanical properties of the Ce/Cr coated alloy foams were investigated by the quasi-static compression test. Simultaneously, the deformation and failure mechanisms of Ce/Cr coated alloy foams were discussed. The results show that the adding amount of CeO2 powders influences the mechanical properties of the Ce/Cr coated alloy foams. Despite an increase in density as compared to the uncoated foams, the Ce/Cr coated foams exhibit improvement in both yield strength and energy- absorption performance. Especially, the energy-absorption performance of 2% Ce/Cr (mass fraction) coated alloy foam is averagely 1.9 times as high as that of the bare Ni-Cr-Fe alloy foam. In addition, the mechanical properties of the Ce/Cr coated alloy foams increase with the increase of strain rate. The distortion and cracking are mainly the deformation behavior of the Ce/Cr coated alloy foam, confirmed by SEM images.

 

Key words: nickel-based alloy foam; mechanical properties; yield stress; plateau stress; failure mechanism

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

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

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