Microstructure and mechanical properties of a 2091 AlLi alloy-I. Microstructure investigated by SAXS and TEM

P. Gomiero; F. Livet; Y. Brechet; F. Louchet

doi:10.1016/0956-7151(92)90027-C

Microstructure and mechanical properties of a 2091 AlLi alloy-I. Microstructure investigated by SAXS and TEM

P. Gomiero, F. Livet, Y. Brechet, F. Louchet

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

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Abstract

The microstructure of the 2091 alloy (AlLiCuMgZr) alloy has been studied and compared to that of two simpler AlLi and AlCuMg alloys. The SAXS, in situ SAXS and TEM techniques have been used for heat treatments at room temperature and at 150°C. The time evolution of the size and of the volume fraction of the δ′ precipitates and of the Cu-rich GPB zones have been determined. The δ′ precipitates are shown to follow a classical Lifschitz-Slyosov-Wagner law. Their interfacial energy has been estimated. S and S′ precipitates have also been characterized, respectively on grain boundaries and on helical dislocations, by TEM.

Original language	English
Pages (from-to)	847-855
Number of pages	9
Journal	Acta Metallurgica Et Materialia
Volume	40
Issue number	4
DOIs	https://doi.org/10.1016/0956-7151(92)90027-C
Publication status	Published - Apr 1992
Externally published	Yes

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abstract = "The microstructure of the 2091 alloy (AlLiCuMgZr) alloy has been studied and compared to that of two simpler AlLi and AlCuMg alloys. The SAXS, in situ SAXS and TEM techniques have been used for heat treatments at room temperature and at 150°C. The time evolution of the size and of the volume fraction of the δ′ precipitates and of the Cu-rich GPB zones have been determined. The δ′ precipitates are shown to follow a classical Lifschitz-Slyosov-Wagner law. Their interfacial energy has been estimated. S and S′ precipitates have also been characterized, respectively on grain boundaries and on helical dislocations, by TEM.",

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AU - Livet, F.

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AB - The microstructure of the 2091 alloy (AlLiCuMgZr) alloy has been studied and compared to that of two simpler AlLi and AlCuMg alloys. The SAXS, in situ SAXS and TEM techniques have been used for heat treatments at room temperature and at 150°C. The time evolution of the size and of the volume fraction of the δ′ precipitates and of the Cu-rich GPB zones have been determined. The δ′ precipitates are shown to follow a classical Lifschitz-Slyosov-Wagner law. Their interfacial energy has been estimated. S and S′ precipitates have also been characterized, respectively on grain boundaries and on helical dislocations, by TEM.

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Microstructure and mechanical properties of a 2091 AlLi alloy-I. Microstructure investigated by SAXS and TEM

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