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분말야금에 의한 Al/TiNip 형상기억 복합재료의 제조 및 특성 평가
박익민,최일동,김부섭,안득만,한창훈 대한금속재료학회(대한금속학회) 1998 대한금속·재료학회지 Vol.36 No.3
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.