Auger electron spectroscopy analysis of grain boundary microchemistry in an Al-Cu-Li alloy

Noémie Ott; Yuanming Yan; Sridhar Ramamurthy; Shravan Kairy; Nick Birbilis

doi:10.1016/j.scriptamat.2016.03.021

Auger electron spectroscopy analysis of grain boundary microchemistry in an Al-Cu-Li alloy

Noémie Ott, Yuanming Yan, Sridhar Ramamurthy, Shravan Kairy, Nick Birbilis

Materials Science & Engineering

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

36 Citations (Scopus)

Abstract

In situ impact fracture combined with Auger electron spectroscopy (AES) was employed to determine grain boundary (GB) microchemistry, namely lithium (Li) concentration, for an Al-Cu-Li alloy. The Li/Al ratio of GBs in the naturally aged condition was revealed to be significantly higher than in the overaged condition (or in the bulk alloy). GB fracture surfaces for the naturally aged alloy were depleted in Cu, whereas in the overaged condition the GB fracture surfaces were depleted in Li and enriched in Cu relative to the bulk composition. These findings are discussed in the context of intergranular corrosion and the precipitation sequence in Al-Cu-Li alloys.

Original language	English
Pages (from-to)	17-20
Number of pages	4
Journal	Scripta Materialia
Volume	119
DOIs	https://doi.org/10.1016/j.scriptamat.2016.03.021
Publication status	Published - 1 Jul 2016

Keywords

Al-Cu-Li alloys
Aluminium alloys
Auger electron spectroscopy (AES)
Grain boundary segregation
Transmission electron microscopy (TEM)

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10.1016/j.scriptamat.2016.03.021

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title = "Auger electron spectroscopy analysis of grain boundary microchemistry in an Al-Cu-Li alloy",

abstract = "In situ impact fracture combined with Auger electron spectroscopy (AES) was employed to determine grain boundary (GB) microchemistry, namely lithium (Li) concentration, for an Al-Cu-Li alloy. The Li/Al ratio of GBs in the naturally aged condition was revealed to be significantly higher than in the overaged condition (or in the bulk alloy). GB fracture surfaces for the naturally aged alloy were depleted in Cu, whereas in the overaged condition the GB fracture surfaces were depleted in Li and enriched in Cu relative to the bulk composition. These findings are discussed in the context of intergranular corrosion and the precipitation sequence in Al-Cu-Li alloys.",

keywords = "Al-Cu-Li alloys, Aluminium alloys, Auger electron spectroscopy (AES), Grain boundary segregation, Transmission electron microscopy (TEM)",

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AU - Ott, Noémie

AU - Yan, Yuanming

AU - Ramamurthy, Sridhar

AU - Kairy, Shravan

AU - Birbilis, Nick

PY - 2016/7/1

Y1 - 2016/7/1

N2 - In situ impact fracture combined with Auger electron spectroscopy (AES) was employed to determine grain boundary (GB) microchemistry, namely lithium (Li) concentration, for an Al-Cu-Li alloy. The Li/Al ratio of GBs in the naturally aged condition was revealed to be significantly higher than in the overaged condition (or in the bulk alloy). GB fracture surfaces for the naturally aged alloy were depleted in Cu, whereas in the overaged condition the GB fracture surfaces were depleted in Li and enriched in Cu relative to the bulk composition. These findings are discussed in the context of intergranular corrosion and the precipitation sequence in Al-Cu-Li alloys.

AB - In situ impact fracture combined with Auger electron spectroscopy (AES) was employed to determine grain boundary (GB) microchemistry, namely lithium (Li) concentration, for an Al-Cu-Li alloy. The Li/Al ratio of GBs in the naturally aged condition was revealed to be significantly higher than in the overaged condition (or in the bulk alloy). GB fracture surfaces for the naturally aged alloy were depleted in Cu, whereas in the overaged condition the GB fracture surfaces were depleted in Li and enriched in Cu relative to the bulk composition. These findings are discussed in the context of intergranular corrosion and the precipitation sequence in Al-Cu-Li alloys.

KW - Al-Cu-Li alloys

KW - Aluminium alloys

KW - Auger electron spectroscopy (AES)

KW - Grain boundary segregation

KW - Transmission electron microscopy (TEM)

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Auger electron spectroscopy analysis of grain boundary microchemistry in an Al-Cu-Li alloy

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Auger electron spectroscopy analysis of grain boundary microchemistry in an Al-Cu-Li alloy

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