• Title/Summary/Keyword: Copper-cald Aluminum composites(Copper-clad Aluminum)

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A study on the Fabrication of Copper-clad Aluminum Composite using Hydrostatic Extrusion (정수압 압출을 이용한 Copper-clad Aluminum 복합계 제조에 대한 연구)

  • 한운용;이경엽;박훈재;윤덕계;김승수
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.7
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    • pp.179-184
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    • 2004
  • In this work, a copper-clad aluminum composite was fabricated using hot hydrostatic extrusion with various extrusion ratios (8.5, 19, 49) and semi-die angles (30, 45, 60 degree) at a temperature of 32$0^{\circ}C$, Material characteristics of copper-clad aluminum composites were determined from compression tests and hardness tests The results showed that for ER of 8.5, the optimum semi-die angle was below or equal to 30 degree and a pressure drop was about 31%. For ER of 19, the optimum semi-die angle was in the range of 40 to 50 degree and a pressure drop was about 38%. In the case of ER=49, the optimum semi-die angle was above or equal to 60 degree and a pressure drop was about 36%. Compressive yield strength was maximum for ER of 8.5 and semi-die angle of 30 degree and the value of maximum was 155 MPa. Uniform hardness distribution was obtained as the extrusion ratio increases and the semi-die angle decreases. In the case of ER=8.5 and semi-die angle of 30 degree, the lowest extrusion pressure and the maximum compressive yield strength was obtained. Therefor, it was concluded that the optimum extrusion condition for fabricated copper-clad aluminum composites under hydrostatic pressure environment was ER of 19 and semi-die angle of 30 degree.

Extrusion Process Analysis of Al/Cu Clad Composite Materials by Finite Element Method (유한요소법을 이용한 Al/Cu 층상복합재료의 압출공정해석)

  • 김정인;강충길;권혁천
    • Composites Research
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    • v.12 no.5
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    • pp.87-97
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    • 1999
  • A clad material is a different type of the typical composites which are composed of two or more matericals joined at their interface surface. The advantge of cald material is that the combination of different materials can satisfy both the need of good mechanical properties and the other demand of user such as electrical properties instantaneously. This paper is concerned with the direct and indirect extrusion processes of copper-clad aluminum rod. Extrusion of copper-clad aluminum rod was simulated using a commercially available finite element package of DEFORM. The simulations were performed for copperclad aluminum rod to predict the distributions of temperature, effective stress, effective strain rate and mean stress for sheath thicknesses, die exit diameters and die temperatures.

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