Ni-Mn alloy has a good foreground of application because of its specific performance. This paper focuses on nanocrystalline electroforming of Ni-Mn alloy. High frequency pulse current and flushing electrolyte were employed to electroform Ni-Mn alloy from an additive-free sulphamate bath. The influence of current parameters, namely, current density, pulse on-time, off-time, etc., on Mn content, surface morphology, crystalline size and microhardness was determined. The results showed that grain size of the pulse electroformed Ni-Mn alloy could be reduced down to the order of nanometer. Close relationships of Mn content, surface morphology, grain size and microhardness with process parameters have been found.
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