Microstructural evolution and mechanical properties enhancement of a cold-sprayed Cu-Zn alloy coating with friction stir processing
Microstructural evolution and mechanical properties enhancement of a cold-sprayed Cu-Zn alloy coating with friction stir processing
复制标题
搅拌摩擦加工冷喷涂铜锌合金涂层的微观结构演变和力学性能增强
DOI：
10.1016/j.matchar.2017.01.027
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发表时间：
2017
影响因子：
4.7
通讯作者：
Montavon G
中科院分区：
文献类型：
--
作者：
Huang CJ;Li WY;Feng Y;Xie YC;Planche MP;Liao HL;Montavon G
提出了一种结合冷喷涂（CS）和搅拌摩擦加工（FSP）两种非常有效的固态技术的新型复合工艺来制备高强度超细晶Cusingle bondZn涂层。结果表明，冷喷涂涂层具有细长的显微组织，78.42%的小角度晶界。FSP处理后，涂层中出现了超细晶，大角度晶界占90.47%，由α、β″和γ相组成，而喷涂态涂层主要为α相。力学性能得到显着提高，即极限抗拉强度从87.2 MPa提高到257.5 MPa，断裂延伸率从0.17%提高到0.81%。析出物对摩擦搅拌涂层的断裂行为有重要影响。
An innovative hybrid process combining two very effective solid-state techniques which are Cold Spray (CS) and Friction Stir Processing (FSP), was proposed to fabricate a high-strength ultrafine-grained Cusingle bondZn coating. Results show that the cold-sprayed coating obtained exhibits an elongated microstructure with 78.42% of low-angle grain boundaries. Following FSP, there appear ultrafine grains with 90.47% of high-angle grain boundaries and a blend of α, β″ and γ phases, while the as-sprayed coating is mainly α-phased. Significant mechanical properties enhancement is achieved, i.e. with the ultimate tensile strength increasing from 87.2 MPa to 257.5 MPa and the fracture elongation increasing from 0.17% to 0.81%. The precipitates have a significant effect on the fracture behavior of friction-stirred coating.