발간논문

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Vol.36, No.8, 1290 ~ 1297, 1998
Title
Transition Behavior of Hot Restoration Mechanism of the SiCp / Al 2024 Composites during Hot Deformation
고병철 , 유연철 Byung Chul Ko , Yeon Chul Yoo
Abstract
The transition of hot restoration behavior of the SiC_p(15Vol.%)/Al 2024 composites reinforced with 1 and 8㎛ SiC_p reinforcements was investigated by hot torsion tests. Flow curves and activation energy of the composites were studied in order to understand the transition behavior of hot restoration mechanism such as dynamic recrystallization(DRX) or dynamic recovery(DRV) during hot deformation. Hot deformed microstructures and dislocation density of the composites were analyzed by TEM. The composite reinforced with 1 ㎛ SiC_p deformed at 320∼460℃ showed a flow curve representing DRX, while the composite deformed at 460∼520℃ showed a flow curve representing DRV. The composite reinforced with 1 ㎛ SiC_p showed the highest failure strain(ε_f=3.65) at ∼470℃, which is a transition temperature of hot restoration mechanism from DRX to DRV.
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