Nano-coupled heterostructure induced excellent mechanical and tribological properties in AlCoCrFeNi high entropy alloy

Publication Name

Tribology International

Abstract

High strength, ductile and wear-resistant alloys are required for engineering applications. This work reports a good combination of mechanical and tribological properties in (NiAl) (FeCr) Co high-entropy alloys (HEAs) via adjusting A2/B2 nano-coupled heterostructure. The A2/B2 heterostructure switches from weave to network structure by increasing x:y ratio from 1:1.3 to 1:1, and eventually forms an island structure when x:y ratio is 1.3:1. Concurrently, the grain boundary FCC phase transforms from continuous to discontinuous as its fraction decreases. The island-like A2/B2 heterostructure provides (NiAl) (FeCr)Co HEA a good compressive yield strength of 1.7 GPa and plasticity of 23.4%. Additionally, (NiAl) (FeCr)Co HEA has the promising wear-resistance from room temperature to 800 °C, ascribing to its excellent strength and the protective tribo-layer at high temperatures. x y (x+y)/2 1.3 1.15 1.3 1.15

Open Access Status

This publication is not available as open access

Volume

154

Article Number

106662

Funding Number

2017D01003

Funding Sponsor

National Natural Science Foundation of China

Share

COinS
 

Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.triboint.2020.106662