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Effect of bonding interface on delamination behavior of drawn Cu/Al bar clad material

中国有色金属学会会刊：英文版 2012年第S3期22卷 645-649页

作者： sangmok lee Min-Geun lee Sang-Pill lee Geun-Ahn lee Yong-Bae KIM Jong-Sup lee Dong-Su BAE Advanced Forming Technology Center Korea Institute of Industrial Technology Department of Advanced Materials Engineering Dong-Eui University Department of Mechanical Engineering Dong-Eui University

Cu/Al bar clad material was fabricated by a drawing process and a subsequent heat *** these processes,intermetallic compounds have been formed at the interface of Cu/Al and have affected its bonding *** of Cu/Al interfaces were observed by OM,SEM and EDX Analyser in order to investigate the bonding properties of the *** to the microstructure a series of diffusion layers were observed at the interface and the thicknesses of diffusion layers have increased with aging time as a result of the diffusion *** interfaces were composed of 3-ply diffusion layers and their compositions were changed with aging time at 400 °*** compositional compounds were revealed to be η2,(θ+η2),(α+θ) intermetallic *** is evident from V-notch impact tests that the growth of the brittle diffusion layers with the increasing aging time directly influenced delamination distance between the Cu sleeve and the Al *** is suggested that the proper holding time at 400 °C for aging as post heat treatment of a drawn Cu/Al bar clad material would be within 1 h.

关键词： drawn Cu/Al bar clad material aging bonding interface intermetallic compound diffusion layer delamination

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

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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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