Characteristic Features of Rolling Texture Development in FCC Alloys Having Very Low Stacking Fault Energies

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  • Sekine Kazuyoshi
    School of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University
  • Wang Jun
    School of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University

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The aim of this paper is to clarify the difference in textural behavior during rolling between low and very low stacking fault energy fcc materials. The rolling texture developments of pure silver and Ag–Zn solid solution alloys containing 8 mass% and 18 mass%Zn were investigated in detail by means of the X-ray texture analysis including the reliable calculations of the orientation distribution function for a wide range of rolling reduction. At higher reductions in thickness (>95%), the terminal textures in all specimens of Ag and Ag–Zn alloys were almost similar, and they exhibited the typical brass type rolling texture in which the dominant {110}⟨112⟩ was developed with the minor component of {110}⟨001⟩. However, it was found at medium degrees of reduction (approximately 50%–75%) that the Ag–Zn alloys having very low stacking fault energies behaved in remarkably different fashion compared to the silver alloy with a moderately low value of stacking fault energy. In such a medium region of rolling reduction, the formation of {111}⟨011⟩ type component which should be considered as a distinct texture component of very low stacking fault energy alloys, such as Ag–Zn alloys, were enhanced with increasing Zn content. This characteristic feature appearing in the rolling texture of very low stacking fault energy alloys is discussed in terms of “the non-Wassermann effect” of deformation twinning which has been suggested by one of the authors already.

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