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Vol.35, No.6, 760 ~ 767, 1997

Title

Interface and Mechanical Properties of Ti-NI Wire reinforced Aluminum Matrix Composites

장동훈 , 차동득 , 임수근 Dong Hun Jang , Dong Deuk Cha , Su Gun Lim

Abstract

The Ti-Ni/Al Composites were fabricated by the squeeze casting method. They were fabricated using Ti-50.2at.% Ni wire with diameter of 0.3, 0.5 and 0.7㎜ and with volume fraction of 5, 10 and 15 under the applied stress of 80㎫ at 473K. The as-cast structure and interface reaction were observed Optical microscope(OM) and Scanning electron microscope(SEM). The microstructures of shape memory treated(ice quenching after heat treated for 30minutes at 773K) composites were: fined more than as-cast structure and the micro structures fined more larger volume fraction than the smaller volume fraction. In the case of shape memory treated Ti-Ni/Al composite, Al was diffused to Ti-Ni wire. In the long fiber, the interface reaction was not affected by pressure. When shape memory treated composites were tensed at 353K, occurred compressed stress by restoring force of shape memory alloy. The strength and elongation of Ti-Ni/Al composites increased with decreasing Ti-Ni wire diameter.

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