Hot-compression behavior of Al-1Mn-1Mg alloy

Abstract

The hot-compression of Al-1Mn-1Mg (mass fraction, %) alloy sample was carried out on a Gleeble-1500 thermo-simulator at deformation temperatures from 320 to 400 °C and strain rates from 0.1 to 10 s⁻¹ by total strain of 1.4. Microstructure and texture evolution of the hot-compressed alloy were investigated by optical microscopy and X-ray diffraction analysis, respectively. The results show that the relationship among flow stress σ, deformation temperature T and strain rate

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can be expressed in the form of βσ = ln

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+ Q/(RT) — ln A. The threshold value of ln Z (Z is Zener-Hollomon parameter) characterizing the dynamic recrystallization (DRX) is 46, below which the DRX takes place. A strong P orientation {011}〈455〉 associated with a weak cube orientation {100}〈001〉 is found in the recrystallized sample during hot-compression.

Keywords

Al-1Mn-1Mg alloy / hot-compression / dynamic recovery / dynamic recrystallization / texture

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