純アルミニウム単結晶材料の塑性変形誘起結晶方位回転に関するSEM・EBSD実験計測・有限要素解析

概要

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A fundamental research has been performed for the evaluation of plastic deformation behavior of single crystal aluminum, with the interest mainly in the crystal rotation induced by the plastic deformation. To take into consideration the influence of dislocation density on hardening evolution, a dislocation density tensor, based on plastic deformation gradient, has been introduced into our elasto/crystalline viscoplastic FE code. FE analyses of uniaxial tension and the in-situ crystal orientation measurement by EBSD were executed as a means of verification. It has been found out by FE analyses and corresponding experiments that the larger the dislocation density, the smaller the hardening rate in the large elastic strain region. The numerical results on the rotations of orientation are shown to be in a fairly good agreement with the experimental results. It is shown that our FE code is effective for the prediction of mechanical behavior of crystals induced by plastic deformation.
一般社団法人日本機械学会の論文
2003-05-25