Self-healing of deformation damage in underaged Al–Cu–Mg alloys

The generation and evolution of open volume defects in underaged and T3 Al–Cu–Mg alloy is studied with positron annihilation spectroscopy. During room temperature ageing the positron lifetime in plastically deformed, underaged material approaches the saturation lifetime of the undeformed material. D...

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Veröffentlicht in:Scripta materialia 2008-05, Vol.58 (9), p.719-722
Hauptverfasser: Hautakangas, S., Schut, H., van Dijk, N.H., Rivera Díaz del Castillo, P.E.J., van der Zwaag, S.
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container_end_page 722
container_issue 9
container_start_page 719
container_title Scripta materialia
container_volume 58
creator Hautakangas, S.
Schut, H.
van Dijk, N.H.
Rivera Díaz del Castillo, P.E.J.
van der Zwaag, S.
description The generation and evolution of open volume defects in underaged and T3 Al–Cu–Mg alloy is studied with positron annihilation spectroscopy. During room temperature ageing the positron lifetime in plastically deformed, underaged material approaches the saturation lifetime of the undeformed material. Doppler-broadening results indicate that this behaviour can be attributed to diffusion and clustering of retained solute Cu atoms at the deformation defects, a process of relevance for the introduction of a self-healing mechanism in age-hardenable aluminium alloys.
doi_str_mv 10.1016/j.scriptamat.2007.11.039
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source Elsevier ScienceDirect Journals Complete
subjects Age hardening
Alloys
Aluminium alloys
Aluminum base alloys
Defects
Deformation
Diffusion
Evolution
Positron annihilation
Positrons
Precipitation
Self-healing
title Self-healing of deformation damage in underaged Al–Cu–Mg alloys
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