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알루미늄 AA5052 판재의 이형압연 시 집합조직 및 미세조직 발달에 미치는 윤활의 영향
박은수 ( Eun Soo Park ),강형구 ( Hyung Gu Kang ),허무영 ( Moo Young Huh ),김휘준 ( Hwi Jun Kim ),배정찬 ( Jung Chan Bae ) 대한금속재료학회 ( 구 대한금속학회 ) 2009 대한금속·재료학회지 Vol.47 No.6
The effect of lubrication on the evolution of strain states during shape rolling in AA5052 sheet was studied by the finite element method (FEM) simulation. The strain states calculated by FEM were verified by texture analysis. Shape rolling with and without lubrication produces shape-rolled samples in fairly similar outer shapes, since the distribution of normal strain components is nearly independent of the lubrication condition. In contrast, the distribution of shear strain components strongly depends on the lubrication condition. Shape rolling without lubrication gives rise to the development of strong shear strain gradients leading to the formation of highly inhomogenous textures and microstructures. The {011}//ND fiber develops during rolling with the operation of plane strain plus ε22. (Received January 14, 2009)