High‐Cycle Fatigue Properties of Ultrafine‐Scale Cu/Ni Laminated Composites

Abstract

Cu/Ni laminated composites with a thickness ratio of the Cu layer to the nanocrystalline Ni layer of 1:20 are prepared by the dual-bath electrodeposition technique. Tensile and fatigue tests are performed at room temperature. The results show that the laminated composites not only have a better synergy of the tensile strength and ductility, but also the higher fatigue strength than the pure Ni counterpart sheets. The introduction of the ultrathin Cu layer into the composite may play a key role in enhancing the ductility and the fatigue cracking resistance. The basic mechanisms for the blunting at the crack tip in the laminated composites are discussed.

A Nickel Dissolution Process for Multilayer Electroforming to Achieve Ultrahigh Adhesion Strength

“…An extraordinarily high yield strength has been achieved in a multilayered Ti/Ti structure, which also possesses an excellent combination of a fine-grain strength and coarse-grain ductility [3]. Through designing the thickness ratios of Cu and Ni, Cu/Ni laminated composites can achieve an ultrahigh strength [4,5]. These multilayer structures were prepared by cold rolling and annealing processes, which are convenient for producing large sheets, but inconvenient for producing complex-shaped thin-wall parts, especially thin-walled revolving parts with a complex profile.…”

Atomistic simulations of mechanical response of a heterogeneous fcc/bcc nanolayered composite

“…The strength of such composites is much higher than that of pure nanocrystalline metals owing to their high density of hetero-interfaces [4]. In recent years, NMMS have attracted significant attention because of their ultra-high strength and hardness [5][6][7], excellent toughness [8,9], good radiation damage resistance [10], and superior thermal stability [11,12], and, therefore, are very promising for a variety of applications in aerospace, machining tools manufacturing, and nuclear industries [13][14][15].…”