Thermal behavior of AlSi12CuMgNi piston alloy with and without short fiber reinforcement
Yuanding Huang,Norbert Hort, Karl Urlich Kainer GKSS Research Center, Institute for Materials Research, Center for Magnesium Technology, Max-Planck-Strasse 1, D-21502, Geesthacht, Germany
Annals 3 No. 7, 2003 pages 279-284
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abstract Mismatch in thermal expansion coefficients could introduce large thermal stress and correspondingly increase the dislocation density in metal matrix composite. The aging behavior could therefore be modified. The CTE mismatch also affects the dimensional stability of metal matrix composites during their service because any fluctuation in environmental temperature could introduce internal thermal stress. The paper presents an overview on our investigations on the thermal behavior of AlSi12CuMgNi piston alloy with and without short fiber reinforcement, including aging, thermal expansion and thermal cycling behaviors. Major experimental results obtained up to now are shown and related physical phenomena are discussed. Key words: metal matrix composite, thermal expansion, thermal cycling, piston alloy