발간논문

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Vol.36, No.3, 469 ~ 478, 1998
Title
Characterization of Al / TiNip Shape Memory Composites Fabricated by Powder Metallurgy
김부섭 , 한창훈 , 최일동 , 박익민 , 안득만 B . S . Kim , C . H . Han , I . D . Choi , I . M . Park , D . M . An
Abstract
Metal matrix composites reinforced with shape memory alloys induce compressive residual stresses in the matrices and result in improved tensile properties of the composite. In the present study. Al/TiNi_p shape memory composites were fabricated by powder metallurgical method, so called Plasma Activated Sintering method (PAS). Strengthening effect due to TiNi particle reinforcement as well as compressive residual stresses in A1 matrix were investigated. Fairly good matrix/reinforcement bonding was observed in the Al/TiNi_p composites. It was found that the yield strength of the composites is increased with increasing the volume fraction of TiNi particles and the amount of prestrain applied to the composites. For example, yield strength increases from 64㎫ to 114㎫ with reinforcement of 8% TiNi_p shape memory particles to the Al matrix when 4% prestrain is applied to the composite.
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