Positron Annihilation Lifetime Spectroscopy of Hot-Rolled and Subsequently T4-Treated AlCuMgAg

Lucian Mathes; Leon Heinl; Andreas Wagner; Maik Butterling; Christoph Hugenschmidt

doi:10.4028/p-HPn08w

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Positron Annihilation Lifetime Spectroscopy of Hot-Rolled and Subsequently T4-Treated AlCuMgAg
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HomeSolid State PhenomenaSolid State Phenomena Vol. 374Positron Annihilation Lifetime Spectroscopy of...

Positron Annihilation Lifetime Spectroscopy of Hot-Rolled and Subsequently T4-Treated AlCuMgAg

Abstract:

Positron annihilation lifetime spectroscopy (PALS) is a unique tool for studying the con-centration and types of open-volume defects. In this study, we performed depth-resolved PALS toinvestigate such defects and the properties of precipitates in differently (heat) treated AlCuMgAgsamples. Alloying AlCu with Ag has been shown to leverage the formation of the so-called Ω(Al2Cu)phase, known for its high strength and thermal stability. We present PALS measurements of Al-4Cu-0.3Mg-0.7Ag containing Ω phase precipitation after hot-rolling and subsequent T4-treatment. Ourfindings showcase the high thermal stability of the Ω phase and that positron annihilation studies helpin understading and optimizing the process of strength hardening AlCuMgAg alloys.

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Periodical:

Solid State Phenomena (Volume 374)

Pages:

79-85

DOI:

https://doi.org/10.4028/p-HPn08w

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Online since:

July 2025

Authors:

Lucian Mathes*, Leon Heinl, Andreas Wagner, Maik Butterling, Christoph Hugenschmidt

Keywords:

AlCuMgAg, Positron Annihilation Lifetime Spectroscopy, Ω(Al2Cu) Phase

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