Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Nanocrystallized Surface Effect on the Tribocorrosion Behavior of AISI 420

Version 1 : Received: 6 October 2022 / Approved: 18 October 2022 / Online: 18 October 2022 (09:52:45 CEST)

A peer-reviewed article of this Preprint also exists.

Ben Saada, F.; Ben Saada, M.; Elleuch, K.; Ponthiaux, P. Nanocrystallized Surface Effect on the Tribocorrosion Behavior of AISI 420. Lubricants 2022, 10, 304. Ben Saada, F.; Ben Saada, M.; Elleuch, K.; Ponthiaux, P. Nanocrystallized Surface Effect on the Tribocorrosion Behavior of AISI 420. Lubricants 2022, 10, 304.

Abstract

Nanopeening treatment was applied to the AISI 420 steel to decrease its sensitivity to the tribocorrosion damage. Microstructural investigation highlighted that the Nanopeening treatment led to a high plastic deformation and nanostructured surface layer with 110 µm depth. . In order to study the combined effect of corrosion and mechanical wear, tribocorrosion tests were performed on non–treated and nanopeened samples in boric acid and lithium hydroxide solution, considering both continuous and intermittent sliding. It was found that the AISI 420 steel is sensitive the synergism between mechanical friction and electrochemical corrosion with a domination of abrasive wear. Adhesive wear was also detected in the wear track. Indeed, the mechanical wear was pronounced under intermittent sliding because of hard wear debris generation from the repassivated layer during rotating time. The Nanopeening treatment led to enhance mechanical performance and corrosion properties. Such improvement could be explained by the high plastic deformation resulting in the nano-structuration of grains and increasing hardness of AISI 420 steel.

Keywords

Microstructure; Grain size; Hardness; Tribology; Corrosion; Passivation

Subject

Engineering, Mechanical Engineering

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