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首页> 外文会议>2006 BIMW >Micromechanism of Plastic Deformation on Elastic Modulus
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Micromechanism of Plastic Deformation on Elastic Modulus

机译：弹性模量塑性变形的微观机制

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The key to enhance the precision of sheet metal stamping parts is accurate prediction and control of the springback. And one of the dominant factors of springback is the elastic modulus. The change of elastic modulus with plastic deformation was experimentally studied for the annealed LY12 and the annealed LF21 aluminum alloy respectively, and the changing role of elastic modulus with plastic deformation was obtained. By inverse pole figure from the X-ray diffraction analysis, the effects of the material original textures and their changing with plastic deformation on the elastic modulus were studied. And by positron annihilation lifetime spectrum , the influence of lattice distortion caused by crystal defect during plastic deformation on the elastic modulus was investigated. The micromechanism of the elastic modulus changing with plastic deformation for aluminum alloy is revealed, which lays a foundation for improving the stamping parts' precision.
机译：提高钣金冲压件精度的关键是回弹的准确预测和控制。回弹的主要因素之一是弹性模量。分别对退火后的LY12铝合金和退火后的LF21铝合金进行了弹性模量随塑性变形的变化研究，得出了弹性模量随塑性变形的变化作用。通过X射线衍射分析的反极图，研究了材料原始织构及其随塑性变形的变化对弹性模量的影响。并通过正电子an没寿命谱，研究了塑性变形过程中晶体缺陷引起的晶格畸变对弹性模量的影响。揭示了铝合金弹性模量随塑性变形而变化的微观机理，为提高冲压件的精度奠定了基础。

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