Abstract AZ91 magnesium alloy cladding layer obtained by cold metal transfer technique was subjected to friction stir processing (FSP). The results showed that, after FSP, the grains of the deposited layer were significantly refined, and the coarse β-Mg17Al12 phase was broken and dispersed into the α-Mg matrix, leading to the microstructure modification. Compared with the unprocessed cladding layer, the FSPed samples exhibited better corrosion resistance. Due to the grain refinement and disintegration of the second phase, the tensile strength and elongation of the cladding layer after FSP increased from 233.4 MPa and 5.6% to 278.5 MPa and 13.4%, respectively.

中文翻译：

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搅拌摩擦加工对AZ91镁合金CMT熔覆层组织和性能的影响

摘要 对冷金属转移技术获得的AZ91镁合金熔覆层进行搅拌摩擦加工(FSP)。结果表明，经过FSP后，沉积层晶粒明显细化，粗大的β-Mg17Al12相被破坏并分散到α-Mg基体中，导致显微组织改性。与未处理的包覆层相比，FSPed 样品表现出更好的耐腐蚀性。由于第二相的晶粒细化和解体，FSP后熔覆层的抗拉强度和延伸率分别从233.4 MPa和5.6%提高到278.5 MPa和13.4%。