Heavily cold drawn iron wires: Role of nano-lamellae in enhancing the tensile strength

The highest strength of iron wires has been achieved with 84 nm thick nano-lamellae at ε = 10.35. The lamellar coalescence slows down the tensile strength increases at ε > 8.89 and balances the lamellar thinning at ε = 10.35, with the strength increase rate close to 0.