발간논문

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Vol.40, No.9, 932 ~ 939, 2002
Title
Mechanical Behaviors : Dynamic Recrystallization and Work Softening of the Al Alloy During Equal Channel Angular Pressing
이재철Jae Chul Lee,서진유Jin Yoo Suh,안재평Jae Pyung Ahn
Abstract
Commercially pure Al alloy sheets were processed using high strain rate dissimilar channel angular pressing(DCAP) as many as 100 passages through the channel with φ= 120˚ in order to investigate the work hardening and the work softening behaviors caused by extremely high strain level (~58). The hardness of the alloy increased significantly by a factor of 2 at strains less than ~2.0, while a gradual decrease in the hardness was observed at strains greater than ~2.0. The work hardening and the work softening behaviors observed from the Al alloy were analyzed by correlating the measured properties with microstructural evolutions observed by transmission electron microscopy(TEM). A detailed microstructural evolution sequence occurring at successive strain stages was also demonstrated.
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