The influence of friction stir welding process on structure and mechanical properties of the AlSiCu/SiC composites

• Autorzy: Kurtyka P. , Sulima I. , Wójcicka A. , Ryłko N. , Pietras A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this study was to explain the influence of the friction stir welding on the size and distribution of reinforcement particles in the composite AlSiCu/SiCp, as well as determine its mechanical properties. Design/methodology/approach: Aluminium alloy reinforced with 10% vol. SiC particles with an average size of 15 microns has been joined using friction stir welding method. The joining process were carried out at rotation speed 560 rpm and linear velocity of 355 mm/min and the temperature was lower than 793 K. Microstructures of joined materials were observed according to the light and scanning electron microscopy. Changing of distribution of reinforcement particles were analysed by new RVE theory. The mechanical properties determined on the basis of compression tests. Tests were performed at room temperature at a strain rate 10^-4s^-1. Findings: In the resulting joints (welds) observed significant changes in the distribution of SiC particles, precipitation which was characterized by macro-heterogeneity. However, in micro scale, a few typical distributions and areas of fragmentation of the reinforcing particles were identified. Differences in the sizes of the ceramic particles were 15 microns in the initial material and 2-3 micron in the welded material, respectively. The analysis of these regions using the new RVE theory shows that the coefficient of mechanical properties anisotropy was varied from 0.500328 to 0.016961. Mechanical testing of selected parts of joints showed significant differences in the values of the plastic flow stress in advancing and retreating sides, approximately from 400 to 450 MPa. Practical implications: The obtained results can be used to optimize the welding process composites by friction stir welding. In addition, the analysis results may be used to design new methods to modify aluminium matrix composites reinforced with ceramic particles. Originality/value: The work provides information on the influence of the FSW process on the change distribution and fragmentation of reinforcing particles and mechanical properties of composites joints.

Słowa kluczowe

EN

aluminium matrix composites; friction stir welding; mechanical properties

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 55, nr 2
• Strony: 339--344
• Opis fizyczny: Bibliogr. 23 poz., rys., tab.

Twórcy

autor

Kurtyka P.

• Institute of Technology, Pedagogical University, ul. Podchorążych 2, 30-084 Kraków, Poland

autor

Sulima I.

• Institute of Technology, Pedagogical University, ul. Podchorążych 2, 30-084 Kraków, Poland

autor

Wójcicka A.

• Institute of Technology, Pedagogical University, ul. Podchorążych 2, 30-084 Kraków, Poland
• X-ray microtomography Lab, Institute of Computer Science, University of Silesia, ul. 1. Pułku Piechoty 75, 41-500, Chorzów, Poland

autor

Ryłko N.

• Institute of Technology, Pedagogical University, ul. Podchorążych 2, 30-084 Kraków, Poland

autor

Pietras A.

• Institute of Welding, ul. Bł. Czesława 16/18, 44-100 Gliwice, Poland

Bibliografia

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