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Effects of cold and warm cross-rolling on microstructure and texture evolution of AZ31B magnesium alloy sheet

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Abstract Mg alloys conventionally rolled often present strong basal textures that affect negatively further deformations, limiting their applications. The present research found that cross-rolling experiences in adequate conditions can weaken… Click to show full abstract

Abstract Mg alloys conventionally rolled often present strong basal textures that affect negatively further deformations, limiting their applications. The present research found that cross-rolling experiences in adequate conditions can weaken those intense basal textures as a result of the interaction of deformation mechanisms and dynamic recrystallization. The effects of rolling temperature and strain rate on the microstructure and texture of an AZ31B magnesium alloy sheet generated heterogeneous microstructure where the initial basal texture was strengthened during cold cross-rolling and it was gradually weakening by the rolling reduction and the rolling temperature increases in such a way that a rather weak basal fiber was produced applying reductions higher than 15% at temperatures higher than 200 °C. Their ODF functions supported the texture weakening, exhibiting a combination of two crystallographic orientations represented by {0001}  1 ¯ 0 > and {0001}〈1 0 1 ¯ 0〉.

Keywords: cross rolling; microstructure texture; magnesium alloy; az31b magnesium; texture

Journal Title: Journal of Magnesium and Alloys
Year Published: 2018

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