Microstructural vortex formation during cyclic sliding of Cu/Au multilayers (original) (raw)

Scripta Materialia, 2015

Abstract

ABSTRACT Nanoscale metallic multilayers have long been known for their high strength and hardness [1], [2] and [3] with layer thickness and interface structure as the controlling factors [3], [4] and [5]. The importance of metallic multilayers in the context of fatigue [6], [7] and [8] and wear [9] and [10] has also been demonstrated. Both the fatigue strength [7] and [8] and wear resistance [9] were observed to increase with decreasing layer thickness. Nanoscale Cu–Ni multilayer coatings very effectively suppressed fatigue crack initiation and showed evidence of reduced accumulated plasticity compared to monolithic coatings [6]. Recently it was suggested that a nanolayered structure that formed during wear testing of Cu90Ag10 alloys – in combination with Ag acting as a solid lubricant – was responsible for reduced wear rates [11]. Considering the high thermal stability of Cu–Nb multilayers [12] and their resistance to radiation damage [13], multilayers represent excellent candidates for applications under extreme loading and temperature conditions. However, in order to understand and exploit these excellent properties, the role of the interface in large strain deformation, plastic deformation mechanisms and deformation microstructures need to be investigated in greater detail for different types of interfaces.

Ruth Schwaiger hasn't uploaded this paper.

Let Ruth know you want this paper to be uploaded.

Ask for this paper to be uploaded.