A process for electrodepositing a low stress nickel-manganese multilayer alloy
on an electrically conductive substrate is provided. The process includes the steps
of immersing the substrate in an electrodeposition solution containing a nickel
salt and a manganese salt and repeatedly passing an electric current through an
immersed surface of the substrate. The electric current is alternately pulsed for
predetermined durations between a first electrical current that is effective to
electrodeposit nickel and a second electrical current that is effective to electrodeposit
nickel and manganese. A multilayered alloy having adjacent layers of nickel and
a nickel-manganese alloy on the immersed surface of the substrate is thereby produced.
The resulting multilayered alloy exhibits low internal stress, high strength and
ductility, and high strength retention upon exposure to heat.
