Effective elastic moduli of in-situ A356/TiB₂ composites

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ÎÄÕÂÒ³Â룺128 - 131

Key words£ºin situ composites£» A356/TiB₂ composite£» effective elastic moduli(EEM)£» adjusted pressure casting

Abstract: The effective elastic moduli £¨EEM£© of A356/TiB₂ composites formed by gravity casting and adjusted pressure casting £¨APC£© were measured and compared. The results show that the EEM of A356/TiB₂ composites are improved obviously by TiB₂ particles and affected by forming methods. The EEM of the specimens formed by APC are higher than those in the gravity casting case. For 9.5%A356/TiB₂£¨volume fraction£©, the EEM of the specimens formed by APC reaches 93¤@GPa, which is 9¤@GPa higher than those in the gravity casting case. An analytic model is established to explain the mechanics of the EEM of composites reinforced with TiB₂ particles.