Effects of the grain shape and crystallographic texture on the grain-scale mechanical behavior of additively manufactured aluminum alloys V. A. Romanova, O. S. Zinovieva, R. R. Balokhonov [et al.]
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ArticleContent type: Текст Media type: электронный Subject(s): селективное лазерное плавление | алюминиевые сплавы | зернистая структура | кристаллографическая текстура | микромеханикаGenre/Form: статьи в журналах Online resources: Click here to access online
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Additive manufacturing Vol. 48, p. A. P. 102415 (1-11)Abstract: The grain shape and texture effects in aluminum alloys manufactured by selective laser melting are studied numerically in terms of micromechanical simulations. The method of step-by-step packing is adopted to generate the three-dimensional grain morphology typical for these materials. Crystal plasticity finite element simulations of uniaxial tension are performed for two models with random and cube-textured columnar grains inherent in selective laser melting. Comparative analysis of the computational results shows a substantial difference between the microscale stress and strain fields. The presence of cube-textured columnar grains provides more homogeneous stress-strain distributions inside the melt pools and unloads the adjacent regions of fine equiaxed grains, thus reducing high stress concentration in them.
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The grain shape and texture effects in aluminum alloys manufactured by selective laser melting are studied numerically in terms of micromechanical simulations. The method of step-by-step packing is adopted to generate the three-dimensional grain morphology typical for these materials. Crystal plasticity finite element simulations of uniaxial tension are performed for two models with random and cube-textured columnar grains inherent in selective laser melting. Comparative analysis of the computational results shows a substantial difference between the microscale stress and strain fields. The presence of cube-textured columnar grains provides more homogeneous stress-strain distributions inside the melt pools and unloads the adjacent regions of fine equiaxed grains, thus reducing high stress concentration in them.
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