Two alloys based on Al-Zn-Mg (Zr), were characterized from microstructural and mechanical points of view. Hot tensile tests and torsion test on as-cast samples were performed. Deformed samples exhibit some static recrystallization (SRX) more evident in the alloy without Zr. As-cast alloys hot deformed by tension exhibits considerable cavitation that increases with temperature (T) . The analysis of this phenomena on 7000 as cast alloy has shown that cavity growth is mainly controlled by plastic strain both at 250°C and 400°C even if grain boundary sliding (GBS) contributes to enhance the fraction of cavities at the highest T . Cavitation is reduced if the alloy is solutionized before deformation.

PROPERTIES, MICROSTRUCTURE AND HOT DEFORMATIONBEHAVIOUR OF DIFFERENT Al-Zn-Mg (Zr) ALLOYS / P., Leo; H. J., Mcqueen; Cerri, Emanuela; S., Spigarelli. - cd-rom conference proceedings:(2012), pp. 1635-1641. (Intervento presentato al convegno ICAA13 tenutosi a Pittsburgh nel giugno 2012).

PROPERTIES, MICROSTRUCTURE AND HOT DEFORMATIONBEHAVIOUR OF DIFFERENT Al-Zn-Mg (Zr) ALLOYS.

CERRI, Emanuela;
2012-01-01

Abstract

Two alloys based on Al-Zn-Mg (Zr), were characterized from microstructural and mechanical points of view. Hot tensile tests and torsion test on as-cast samples were performed. Deformed samples exhibit some static recrystallization (SRX) more evident in the alloy without Zr. As-cast alloys hot deformed by tension exhibits considerable cavitation that increases with temperature (T) . The analysis of this phenomena on 7000 as cast alloy has shown that cavity growth is mainly controlled by plastic strain both at 250°C and 400°C even if grain boundary sliding (GBS) contributes to enhance the fraction of cavities at the highest T . Cavitation is reduced if the alloy is solutionized before deformation.
2012
9781118458044
PROPERTIES, MICROSTRUCTURE AND HOT DEFORMATIONBEHAVIOUR OF DIFFERENT Al-Zn-Mg (Zr) ALLOYS / P., Leo; H. J., Mcqueen; Cerri, Emanuela; S., Spigarelli. - cd-rom conference proceedings:(2012), pp. 1635-1641. (Intervento presentato al convegno ICAA13 tenutosi a Pittsburgh nel giugno 2012).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2677498
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