中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 33 No. 11 November 2023 |
（1. National and Local Joint Engineering Research Center for Functional Materials Processing, School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;
2. Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, National Engineering Laboratory of Modern Materials Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510651, China）
Abstract:Bulk 6061 aluminum (Al) alloy was prepared by cold spray-friction stir processing composite additive manufacturing (CFAM). The microstructures of the cold sprayed (CS) and CFAM samples were characterized by OM, SEM and EBSD, and their mechanical properties and corrosion behavior were investigated by microhardness, tensile and corrosion tests. The results show that, compared with the CS sample, the microstructure of the CFAM sample is densified and homogenized. The grains are small and equiaxed with an average grain size of 3.1 μm. The microhardness, ultimate tensile strength, and elongation of the CFAM sample are increased by 22%, 171%, and 683%, respectively. The corrosion current density of CFAM sample is 95.1%-97.8% lower than that of CS sample, and the corrosion mechanism is changed from pitting corrosion of CS sample to intergranular corrosion.
Key words: cold spray-friction stir processing composite additive manufacturing (CFAM); 6061 Al alloy; microstructure; mechanical properties; corrosion mechanism
