Precipitation of metastable δ′ in Al–1·9Li–2·5Mg alloy

H. Tsubakino; R. Nozato; T. Sakurai; Y. Hasegawa; Y. Hayashi

doi:10.1179/mst.1994.10.3.222

Precipitation of metastable δ′ in Al–1·9Li–2·5Mg alloy

H. Tsubakino, R. Nozato, T. Sakurai, Y. Hasegawa, Y. Hayashi

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Metastable δ′ precipitates formed at 473 K in Al–1·9Li–2·5Mg alloy have been studied via specific heat measurements, analytical transmission electron microscopy, and atom probe field ion microscopy. The peak temperature of heat absorption associated with the resolution of δ′ into the matrix increases by more than 45 K after prolonged aging, i.e. the thermal stability of δ′ is enhanced by the aging treatment. The coarsening of δ′ obeys Ostwald ripening kinetics. However, the increase in the peak temperature is not related to the increase in size of δ′ but is instead attributed to an increase of the Mg content in δ′ precipitates; presumably, δ′ changes from Al3Li to (Al, Mg)3Li.

Original language	English
Pages (from-to)	222-226
Number of pages	5
Journal	Materials Science and Technology (United Kingdom)
Volume	10
Issue number	3
DOIs	https://doi.org/10.1179/mst.1994.10.3.222
Publication status	Published - 1994 Mar

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1179/mst.1994.10.3.222

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title = "Precipitation of metastable δ′ in Al–1·9Li–2·5Mg alloy",

abstract = "Metastable δ′ precipitates formed at 473 K in Al–1·9Li–2·5Mg alloy have been studied via specific heat measurements, analytical transmission electron microscopy, and atom probe field ion microscopy. The peak temperature of heat absorption associated with the resolution of δ′ into the matrix increases by more than 45 K after prolonged aging, i.e. the thermal stability of δ′ is enhanced by the aging treatment. The coarsening of δ′ obeys Ostwald ripening kinetics. However, the increase in the peak temperature is not related to the increase in size of δ′ but is instead attributed to an increase of the Mg content in δ′ precipitates; presumably, δ′ changes from Al3Li to (Al, Mg)3Li.",

author = "H. Tsubakino and R. Nozato and T. Sakurai and Y. Hasegawa and Y. Hayashi",

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T1 - Precipitation of metastable δ′ in Al–1·9Li–2·5Mg alloy

AU - Tsubakino, H.

AU - Nozato, R.

AU - Sakurai, T.

AU - Hasegawa, Y.

AU - Hayashi, Y.

PY - 1994/3

Y1 - 1994/3

N2 - Metastable δ′ precipitates formed at 473 K in Al–1·9Li–2·5Mg alloy have been studied via specific heat measurements, analytical transmission electron microscopy, and atom probe field ion microscopy. The peak temperature of heat absorption associated with the resolution of δ′ into the matrix increases by more than 45 K after prolonged aging, i.e. the thermal stability of δ′ is enhanced by the aging treatment. The coarsening of δ′ obeys Ostwald ripening kinetics. However, the increase in the peak temperature is not related to the increase in size of δ′ but is instead attributed to an increase of the Mg content in δ′ precipitates; presumably, δ′ changes from Al3Li to (Al, Mg)3Li.

AB - Metastable δ′ precipitates formed at 473 K in Al–1·9Li–2·5Mg alloy have been studied via specific heat measurements, analytical transmission electron microscopy, and atom probe field ion microscopy. The peak temperature of heat absorption associated with the resolution of δ′ into the matrix increases by more than 45 K after prolonged aging, i.e. the thermal stability of δ′ is enhanced by the aging treatment. The coarsening of δ′ obeys Ostwald ripening kinetics. However, the increase in the peak temperature is not related to the increase in size of δ′ but is instead attributed to an increase of the Mg content in δ′ precipitates; presumably, δ′ changes from Al3Li to (Al, Mg)3Li.

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Precipitation of metastable δ′ in Al–1·9Li–2·5Mg alloy

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