Home Kovove Materialy-Metallic Materials 2020 Kovove Materialy-Metallic Materials Vol. 58 (2020), no. 2, pp.83–91

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Kovove Materialy-Metallic Materials Vol. 58 (2020), no. 2, pp.83–91

Title: Microstructure and tribological behavior of SPS processed Fe/Ti-15wt.%Cu-based metal matrix composites with incorporated waste Ti-chips
Author: M. Podobová, V. Puchý, L. Falat, R. Džunda, M. Besterci, P. Hvizdoš

Abstract: In present work, the Fe/Ti-15wt.%Cu-based metal matrix composites with three different Fe/Ti weight percent ratios (i.e., 40/25, 25/40, 5/60) and constant additions of non-metallic additives (i.e., 5 wt.% graphite, 5 wt.% SiC, and 10 wt.% ZrO2) were investigated. An innovative and ecologically friendly approach for laboratory preparation of the experimental composite materials was based on the secondary utilization (recycling) of the waste Ti-chips (turnings) from conventional machining operations. The material mixtures for the fabrication of the studied composites were prepared by common powder metallurgy pre-operations followed by final material processing using spark plasma sintering (SPS). The microstructure of the SPS-fabricated composite materials consisted of sintered grain matrix with various amounts and distribution of Ti-chips. The friction and wear behavior of the composites was analyzed from performed tribological measurements employing “ball-on-disc” test method. The results showed that the coefficient of friction was mostly decreasing with increasing the sliding speed and the amount of Ti-chips in the composites. The lowest abrasion wear rate exhibited the composite with 40 wt.% of Ti-chips thanks to its optimal microstructure with appropriate hardness and beneficial wear mechanisms characteristics.

Keywords: metal matrix composite (MMC), Ti waste reuse, microstructure, friction and wear behavior
Published online: 02-Apr-2020
Year: 2020, Volume: 58, Issue: 2 Page From: 83, Page To: 91

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