Regeneration of Aluminum Matrix Composite Reinforced by SiCp and GCsf Using Gas Tungsten Arc Welding Technology

Autor:	Jakub Wieczorek, Janusz Adamiec, Anna J. Dolata, Maciej Dyzia, Katarzyna Łyczkowska
Rok vydání:	2021
Předmět:	Technology Materials science Composite number GTAW welding chemistry.chemical_element Welding Article law.invention chemistry.chemical_compound silicon carbide law Centrifugal casting (industrial) Aluminium aluminum matrix composites Silicon carbide General Materials Science Composite material Microscopy QC120-168.85 Filler metal Gas tungsten arc welding QH201-278.5 Tribology Engineering (General). Civil engineering (General) TK1-9971 Descriptive and experimental mechanics chemistry tribological test Electrical engineering. Electronics. Nuclear engineering TA1-2040 glassy carbon
Zdroj:	Materials Materials, Vol 14, Iss 6410, p 6410 (2021) Volume 14 Issue 21
ISSN:	1996-1944
DOI:	10.3390/ma14216410
Popis:	The main motivation behind the presented research was the regeneration of the damaged surface of composite materials. The testing of melting and pad welding of the composite surface by Gas Tungsten Arc Welding (GTAW) with alternating current (AC) were carried out. The material of investigation was an AlSi12/SiCp + GCsf hybrid composite made by a centrifugal casting process. The composite was reinforced with 5 wt.% of silicon carbide particles and 5 wt.% of glassy carbon spheres. The composites were investigated in tribological tests. It was found that there was a possibility for modification or regeneration of the surface with pad welding technology. Recommended for the repairs was the pad welding method with filler metal with a chemical composition similar to the aluminum matrix composite (ISO 18273 S Al4047A (AlSi12 [A])). The surface of the pad welding was characterized by the correct structure with visible SiCp. No gases or pores were observed in the pad welding this was due to a better homogeneity of the silicon carbide (SiCp) distribution in the composite and better filling spaces between liquid metal particles in comparison to the base material. Based on the tribological tests, it was found that the lowest wear was observed for the composite surface after pad welding. This was related to the small number of reinforcing particles and their agreeable bonding with the matrix. The plastic deformation of the Al matrix and scratching by worn particles were a dominant wear mechanism of the surface.
Databáze:	OpenAIRE
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