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Effect of hydro co-extrusion on microstructure of duo-cast Al3003/Al4004 clad materials

Transactions of Nonferrous Metals Society of China 2014年第S1期24卷 75-80页

作者： In-Soo SON Sang-Pill LEE Jin-Kyung LEE Woo-Cheol KIM Ji-Seon MOON Sangmok LEE Jong-Sup LEE Yong-Bae KIM Geun-Ahn LEE Dong-Su BAE Department of Mechanical Engineering Dong-Eui University Busan Korea Department of Advanced materials Engineering Dong-Eui University Busan Korea Advanced Forming Tech. Center Korea Institute of Industrial Technology Incheon Korea

The effects of hydro co-extrusion on the microstructure changes of aluminum hybrid duo-cast Al 3003/Al 4004 clad materials were studied. The specimen of duo-cast Al 3003/Al 4004 clad materials was in circle shape, and was composed of Al 3003(outside) and Al 4004(inside) materials. The specimen was extruded by the hydro co-extrusion equipment. The manufacturing conditions of the specimen were 423 K in temperature and 5 in extrusion ratio. The dimensions of the specimen were 80 mm in diameter of the Al 4004 material and 35 mm in thickness of the Al 3003 material before the hydro co-extrusion process, and 30 mm in diameter and about 5 mm in thickness after the extrusion process, respectively. The microstructure and the hardness for two specimens were investigated. The hardness value of cross section in the duo-cast Al 3003/Al 4004 clad materials before the extrusion process was increased in form of the parabola toward the center. However, after the extrusion process, it was almost constant in the portion of Al 4004 material. Lots of big voids above 1 mm in diameter in the specimen existed in the interfacing region of Al 3003 and Al 4004 materials before the extrusion process. These big voids disappeared after the process of hydro co-extrusion.

关键词： clad materials hydro co-extrusion process duo-casting microstructure

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