Some selected mechanical properties of composite materials for combustion engine pistons
Dariusz Rudnik*, Jerzy Sobczak** *Instytut Transportu Samochodowego, ul. Jagiellońska 80, 03-301 Warszawa **Instytut Odlewnictwa, ul. Zakopiańska 73, 30-418 Kraków,
Annals 2 No. 5, 2002 pages 342-347
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abstract The dynamic development of automobile industry and continuously growing criteria concerning economic and ecological management of automobiles contributed to the fact that the traditional methods of automobile designing have turned out to be insufficient. Therefore, it become essential to introduce new materials, which would be able to meet more and more requirements. The mechanical characteristics for combustion engine pistons, such us tensile properties at room and elevated temperatures, fatigue and impact characteristics, and hardness are extremely important for reasonable and high performance designing. In this paper some selected mechanical properties for different particle reinforced aluminum matrix composites materials containing fly ash (ALFA®), nickel coated graphite and silicon carbide (F3S.20S) have been investigated along with monolithic and locally reinforced with alumina short fibers AlSi12CuNiMg alloy. The results of hardness measurements (Fig. 1), selected strength properties at room (Fig. 2 and Tab. 1) and elevated temperature (Fig. 3), impact strength (Tab. 2) showed the advantages of new materials compared with traditional ones, especially AlSi12CuNiMg monolithic alloy widely used for production of IC engine pistons. Therefore, it may be conducted, that the adoption of composite materials will contribute to the construction changes of the pistons, and as a final results to the pistons for new engines, which will bring the anticipated improvement of the car.