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Elastic interaction stresses: Part II. The influence of orientation on stresses generated in iso-axial bicrystals

  • Mechanical Behavior
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Abstract

The effects of four types of incompability on stresses generated in seven iso-axial bicrystals of 70-30 alpha brass subjected to tension were examined by finite element methods. The distribution of applied stress and resolved shear stresses was determined. The applied stress, {\(\sigma _{zz}\)}, was higher at the interior than at the surface, while the resolved shear stresses were generally higher at the surface. For both applied {\(\sigma _{zz}\)} and resolved shear stresses, the largest stresses occurred at the bicrystal boundaries. The effect of end constraints on a [213] oriented single crystal was found to create nonuniform stresses and strains, and an explanation for this behavior was proposed. The effect of orientation on the magnitude of grain boundary resolved shear stress, {\(\sigma _{gb} \)}, and the relative extent (volume fraction) of enhanced grain boundary resolved shear stress,V gb, were determined. The highest values of {\(\sigma _{gb} \)} andV gb were reached in different portions of the stereographic triangle. The elastic interactions producing this behavior were too complex to permit a simple interpretation.

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Authors and Affiliations

  1. United States Army Technology Laboratory, 02172, Watertown, MA

    Tzi-Kang Chen

  2. Department of Metallurgy and Materials Science, Polytechnic University, 333 Jay Street, 11201, Brooklyn, NY

    Harold Margolin (Professor)

Authors
  1. Tzi-Kang Chen
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  2. Harold Margolin
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TZI-KANG CHEN formerly Graduate Student at Polytechnic University

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Chen, TK., Margolin, H. Elastic interaction stresses: Part II. The influence of orientation on stresses generated in iso-axial bicrystals. Metall Trans A 20, 1461–1473 (1989). https://doi.org/10.1007/BF02665503

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  • DOI: https://doi.org/10.1007/BF02665503

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