An investigation on the wear and subsurface deformation mechanism of CoCrFeMnNi high entropy alloy at subzero temperature

Li，Zhen1,2,3; Zhang，Liangchi1,2,3; Gain，Asit Kumar1,2,3

2023

10.1016/j.wear.2023.204868

Wear   Impact Factor & Quartile

0043-1648

Developing high entropy alloys (HEAs) has opened up a new dimension of alloy design towards better properties than those of the existing ones. Recently, a single face-centered cubic HEA, CoCrFeMnNi, has received considerable attention due to its high strength, exceptional ductility, high hardness and outstanding fracture toughness at subzero temperatures. However, the wear and subsurface deformation mechanisms of this material under subzero temperatures have not been well understood. This work aims to explore the wear mechanisms and subsurface deformation behavior of CoCrFeMnNi at subzero temperatures down to −50 °C, with the aid of contact sliding on a tribometer using tungsten carbide balls of 6.5 mm in diameter. It was found that the HEA demonstrated abrasion wear behaviors with a lower wear rate at the room temperature. Many shear bands emerged in the neighborhood of the worn surface, indicating severe plastic deformation. It was also found that that at a subzero temperature, contact sliding would cause microstructural evolution and mechanical property variation in the subsurface.

High entropy alloy Nanomechanical characterization Subzero temperature Wear mechanism

English

Corresponding

Basic and Applied Basic Research Foundation of Guangdong Province[2020A1515110390];National Natural Science Foundation of China[52293401];

MATERIALS SCIENCE

2-s2.0-85151900662

Scopus

1.Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics,China
2.SUSTech Institute for Manufacturing Innovation,China
3.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Li，Zhen,Zhang，Liangchi,Gain，Asit Kumar. An investigation on the wear and subsurface deformation mechanism of CoCrFeMnNi high entropy alloy at subzero temperature[J]. Wear,2023.

Li，Zhen,Zhang，Liangchi,&Gain，Asit Kumar.(2023).An investigation on the wear and subsurface deformation mechanism of CoCrFeMnNi high entropy alloy at subzero temperature.Wear.

Li，Zhen,et al."An investigation on the wear and subsurface deformation mechanism of CoCrFeMnNi high entropy alloy at subzero temperature".Wear (2023).