Fretting wear resistance of aluminum alloy specimens manufactured by laser microcladding

Tatyana V Tarasova,Galina O Gvozdeva,S.N Grigoriev,M.A Volosova

doi:10.1051/meca/2016073

Tatyana V Tarasova, Galina O Gvozdeva + Show 2 more

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https://doi.org/10.1051/meca/2016073

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Journal: Mechanics & Industry	Publication Date: Jan 1, 2016
Citations: 1	License type: cc-by

Affiliation: Moscow State Technological University

Abstract

This paper reports the results of studies of the fretting wear resistance of specimens manufactured by laser microcladding. The initial materials were powders of Al-Si hypereutectic alloy which contained: (70–74)wt.% Al (26–30)wt.% Si. %. The influence of the laser microcladding parameters on hardness and fretting wear resistance of the cladded materials was investigated. It was found that hardness and wear resistance of the cladded material increased with the decrease of powder mass flow.

Highlights

The three-dimensional forming by laser microcladding is a relatively new trend in additive manufacturing [1,2,3,4]
The structure of AlSi30 alloy produced by laser microcladding under low-energy condition, is represented by colonies of quasi-eutectic mixture of supersaturated α-solid solution of Al(Si) and Si, peripherally to which the Si (Sip) primary crystals, surrounded by a band of α-phase, are located
The obtained data allow us to conclude that the friction of specimens of AlSi30 alloy produced under preferential laser microcladding parameters set is accompanied by a full-blown relative slipping and the absence of zones of elastic interaction, which makes it possible to eliminate the possibility of fatigue fracture of the rubbing bodies

Summary

Introduction

The three-dimensional forming by laser microcladding is a relatively new trend in additive manufacturing [1,2,3,4] This method is based on enhancing capabilities of coaxial laser cladding towards miniaturization of sizes of the grown element. The miniaturization of sizes of the grown element is achieved by series of action consisting of choosing the corresponding technological equipment and treatment conditions. Such technology makes it possible to create small-sized products of complex shape on the basis of three-dimensional computer models in a single process cycle [5]. A wide range of powder materials and flexibility of laser treatment make is possible to synthesize new materials and coatings [6,7,8,9]

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