다이캐스팅법에 의해 제조된 SiC 입자강화 알루미늄합금기 복합재료의 미세조직 및 인장특성 = Microstructure and Tensile Properties of SiCp-reinforced Aluminum Alloy Composites Fabricated by Die Casting Method

다국어 초록 (Multilingual Abstract)

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다국어 초록 (Multilingual Abstract)

The main objective of this study is to investigate the microstructure and tensile strength of SiC_p/Al alloy composites fabricated by die casting method. Die casting was performed using the preheated mold at the pouring temperature range of 620∼750℃ under the pressure of 1,039 kgf/㎠. The low speed and a following high injection speed were 0.4 and 2.1m/s, respectively. The microstructure of SiC_p/Al alloy composites fabricated by die casting method was found to be finer than that of composites fabricated by gravity casting. Also, SiC particulates were homogeneously distributed in refined A1 matrix due to rapid solidification. The tensile strength of SiC_p/Al alloy composites fabricated by die casting method was found to be varied with cast temperature. The maximun tensile strength of SiC_p(10 vol.% and 20 vol.%)/Al alloy composites showed 380 MPa at the cast temperature of 750℃ and 363 MPa at the cast temperature of 700℃, respectively.