Nickel foam sheet and pure aluminum solid sheet for electrodes and catalyst carrier were successfully welded via ultrasonic spot welding. Two kinds of sizes of anvil teeth which were in contact with the nickel foam were designed. Effects of anvil teeth shapes on plastic deformation and performances were compared. Influence of teeth shapes and welding parameters on tensile properties and fracture morphologies were analyzed. The results showed that the 30 J specimen welded by small teeth anvil had the optimal tensile strength and fracture energy, which reached 58% and 69.1% of nickel foam base metal, respectively. The anodic polarization curves of two kinds of welded joints in 3.5% NaCl solution were compared. The results of energy-dispersion spectrum analysis showed that the element diffusion across the interface diffusion was insufficient, and no obvious intermetallic compound layer in the welding interface was observed. The welding process was solid state process.
XIE Yan
,
FENG Mengnan
,
LUO Zhen
. Effect of teeth shape on ultrasonic spot welding joints of nickel foam sheet and aluminum solid sheet[J]. Transactions of The China Welding Institution, 2018
, 39(12)
: 5
-8
.
DOI: 10.12073/j.hjxb.2018390288
[1] Yuan J, Chen C, Hao Y, et al. Three-dimensionally porous CoMn2O4, thin films grown on Ni foams for high-performance lithium-ion battery anodes[J]. Journal of Materials Science, 2017, 52(10):1-8.
[2] Jiang T, Zhang S, Qiu X, et al. Preparation and characterization of silicon-based three-dimensional cellular anode for lithium ion battery[J]. Electrochemistry Communications, 2007, 9(5):930-934.
[3] Longerich S, Piontek D, Ohse P, et al. Joining strategies for open porous metallic foams on Iron and nickel base materials[J]. Advanced Engineering Materials, 2007, 9(8):670-678.
[4] Nowacki J, Moraniec K. Welding of metallic AlSi foams and AlSi-SiC composite foams[J]. Archives of Civil & Mechanical Engineering, 2015, 15(4):940-950.
[5] Born C, Kuckert H, Wagner G, et al. Ultrasonic torsion welding of sheet metals to cellular metallic materials[J]. Advanced Engineering Materials, 2003, 5(11):779-786.
[6] Born C, Wagner G, Eifler D. Ultrasonically welded aluminium foams/sheet metal-joints[J]. Advanced Engineering Materials, 2006, 8(9):816-820.
[7] Ren D, Zhao K, Pan M, et al. Ultrasonic spot welding of magnesium alloy to titanium alloy[J]. Scripta Materialia, 2017, 126:58-62.
[8] Mirza F A, Macwan A, Bhole S D, et al. Effect of welding energy on microstructure and strength of ultrasonic spot welded dissimilar joints of aluminum to steel sheets[J]. Materials Science & Engineering A, 2016, 668:73-85.
[9] Kumar S, Wu C S, Padhy G K, et al. Application of ultrasonic vibrations in welding and metal processing:A status review[J]. Journal of Manufacturing Processes, 2017, 26:295-322.
