Wear and Corrosion Resistance of AlSi10Mg-CP-Ti Metal-Metal Composite Materials Produced by Electro-Sinter-Forging

Federico Simone Gobber; Elisa Fracchia; Roberto Spotorno; Alessandro Fais; Diego Manfredi

doi:10.3390/ma14226761

Wear and Corrosion Resistance of AlSi10Mg-CP-Ti Metal-Metal Composite Materials Produced by Electro-Sinter-Forging

Materials (Basel). 2021 Nov 10;14(22):6761. doi: 10.3390/ma14226761.

Authors

Federico Simone Gobber¹, Elisa Fracchia^{1

2}, Roberto Spotorno³, Alessandro Fais⁴, Diego Manfredi¹

Affiliations

¹ Department of Applied Science and Technology (DISAT), Polytechnic of Turin, Corso Duca degli Abruzzi 24, 10124 Torino, Italy.
² Consorzio Interuniversitario di Scienza e Tecnologia dei Materiali (INSTM), Via G. Giusti 9, 50121 Firenze, Italy.
³ Department of Chemistry and Industrial Chemistry (DCCI), University of Genoa, Via Dodecaneso 31, 16146 Genoa, Italy.
⁴ Epos s.r.l., Via Pavia 68/72, 10098 Rivoli, Italy.

Abstract

Metal-metal composites are a class of composite materials studied for their high ductility and strength, but their potential applications are currently limited by the complex manufacturing processes involved. Electro-sinter-forging (ESF) is a single-pulse electro discharge sintering technique that proved its effectiveness in the rapid sintering of several metals, alloys, and composites. Previous studies proved the processability of Ti and AlSi10Mg by ESF to produce metal-metal composites and defined a correlation between microstructure and processing parameters. This paper presents the wear and corrosion characterizations of two metal-metal composites obtained via ESF with the following compositions: 20% Ti/80% AlSi10Mg and 20% AlSi10Mg/80% Ti. The two materials showed complementary resistance to wear and corrosion. A higher fraction of AlSi10Mg is responsible for forming a protective tribolayer in dry-sliding conditions, while a higher fraction of Titanium confers improved corrosion resistance due to its higher corrosion potential.

Keywords: AlSi10Mg; CP–Titanium; Raman; electro-sinter-forging; electrochemical impedance spectroscopy E.I.S.; metal–metal composites; tribological testing.