Microstructural parameters and flow stress in Al-0.13% Mg deformed by ECAE processing.

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Abstract

A high purity Al-0.13 wt.% Mg alloy was deformed to a von Mises strain of 10 and subsequently annealed at temps. between 100 and 400 DegC for 1 h. Boundary spacings were measured in orthogonal directions for all boundaries by EBSD and their corresponding Sv were calcd. over both measurement directions. Boundaries with misorientations q>=15 Deg were used to calc. a std. Hall-Petch strengthening contribution while the boundaries with q between 1 Deg and 15 Deg were used to calc. a dislocation strengthening contribution. The combined calcns. showed close agreement to actual mech. test data over more than two orders of magnitude of boundary spacing and significant morphol. change. The importance of measuring boundary misorientations for the detn. of microstructure-property relationships is concluded. [on SciFinder (R)]

Keyword(s)

Extrusion of metals (equal channel angular microstructural parameters and flow stress in Al-0.13% Mg deformed by ECAE processing) Stress (flow microstructural parameters and flow stress in Al-0.13% Mg deformed by ECAE processing) Annealing Crystal dislocations Crystal orientation Microstructure Strain hardening (microstructural parameters and flow stress in Al-0.13% Mg deformed by ECAE processing) Plastic deformation (severe microstructural parameters and flow stress in Al-0.13% Mg deformed by ECAE processing) Tensile strength (ultimate microstructural parameters and flow stress in Al-0.13% Mg deformed by ECAE processing) Stress (yield microstructural parameters and flow stress in Al-0.13% Mg deformed by ECAE processing)

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