Microstructure, mechanical properties, and corrosion behavior of 6061Al alloy prepared by cold spray-friction stir processing composite additive manufacturing

作者：Zhihao Liu, Peng HAN, Wang Wen, Xiaohu Guan, Zhi Wang, Yuan FANG, Ke Qiao, Dongming Ye, Jun Cai, Yingchun Xie, Kuaishe Wang · 发表于：Transactions of Nonferrous Metals Society of China · 年份：2023 · DOI：10.1016/s1003-6326(23)66331-9 · 被引用次数：15 · 研究领域：Aluminum Alloys Composites Properties、Intermetallics and Advanced Alloy Properties、Aluminum Alloy Microstructure Properties

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 3.1μm. 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.