Aerospace application on Al 2618 with reinforced – Si3N4, AlN and ZrB2 in-situ composites
2016; Elsevier BV; Volume: 672; Linguagem: Inglês
10.1016/j.jallcom.2016.02.155
ISSN1873-4669
AutoresN. Mathan Kumar, Senthil Kumaran Selvaraj, L.A. Kumaraswamidhas,
Tópico(s)Advanced Machining and Optimization Techniques
ResumoIn this study, the Al 2618 aluminium alloy is reinforced with Si3N4 (Silicon Nitride), AlN (Aluminium Nitride) & ZrB2 (Zirconium Boride) in wt. % of (0,2,4,6,8) by stir casting process. The tribological and mechanical properties of these composites particles were investigated under dry sliding conditions. The mechanical properties of the composites is studied by conducting various test like hardness test, tensile test and compression test to understand the relationship between the wt. % of reinforcement and the matrix metal. This is followed by the micro structural study to examine the bond formation and effect of grain size reduction due to the addition of reinforcement. The Taguchi L25 orthogonal array is used to optimize the process parameters to obtain minimum wear rate and the analysis of variance (ANOVA) was used to investigate the influence of parameter affecting the wear rate. The Scanning Electron Microscope (SEM) analysis is carried out to understand the wear mechanism of worn out surfaces and the wear debris. The manipulate of the wt. % of reinforcements and applied load on the wear rate, wear resistance, specific wear rate, coefficient of wear rate and the mass loss were premeditated using the pin-on-disk method.
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