Bending properties of nanocrystalline Ni-18at% W alloy produced by electrodeposition

Abstract

A nanocrystalline Ni-18 at% W alloy with the grain size of 5.3 nm was produced by an electrodeposition method and its bending properties were investigated in the temperature range between room temperature and 673 K. At room temperature and 373 K, the nanocrystalline Ni-W alloy could be bent to an angle of 180 degrees without fracturing. At 423 K and above, the alloy fractured before reaching 180 degree during bending. Significant springback behavior was observed after 180 degree bending at room temperature under the condition that a compressive load of 9 N was applied during bending. As the compressive load was increased from 30 N to 135 N, the magnitude of springback decreased. Thus, the nanocrystalline Ni-W alloy exhibited excellent bendability at room temperature.