The role of grain structure characteristics on the localised corrosion feature in the 1445 Al-Cu-Li alloy

Dan yang Liu; Feng jian Sang; Jin feng Li; Nick Birbilis; Zhi xiu Wang; Yun long Ma; Rui feng Zhang

doi:10.1016/j.matchar.2019.109981

The role of grain structure characteristics on the localised corrosion feature in the 1445 Al-Cu-Li alloy

Dan yang Liu, Feng jian Sang, Jin feng Li^*, Nick Birbilis, Zhi xiu Wang, Yun long Ma, Rui feng Zhang

^*Corresponding author for this work

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

27 Citations (Scopus)

Abstract

The corrosion behavior of the 1445 aged alloy was studied by analysis of microstructure characteristics and grain structure characteristics achieved from TEM, STEM, and EBSD. Three corrosion modes including intergranular corrosion (IGC), sub-intergranular corrosion (SIGC), and sub-intragranular corrosion (SGC) were found in the aged samples. In contrast with the conventional Al-Cu-Li alloy, the increased corrosion resistance was derived from the lower chemical potential difference between δ′ phase in matrix and S′ phase at GBs. The grain stored energy can significantly affect the SGC especially under a specific grain orientation thus the corrosion resistance of deformed grains can be increased.

Original language	English
Article number	109981
Journal	Materials Characterization
Volume	158
DOIs	https://doi.org/10.1016/j.matchar.2019.109981
Publication status	Published - Dec 2019

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title = "The role of grain structure characteristics on the localised corrosion feature in the 1445 Al-Cu-Li alloy",

abstract = "The corrosion behavior of the 1445 aged alloy was studied by analysis of microstructure characteristics and grain structure characteristics achieved from TEM, STEM, and EBSD. Three corrosion modes including intergranular corrosion (IGC), sub-intergranular corrosion (SIGC), and sub-intragranular corrosion (SGC) were found in the aged samples. In contrast with the conventional Al-Cu-Li alloy, the increased corrosion resistance was derived from the lower chemical potential difference between δ′ phase in matrix and S′ phase at GBs. The grain stored energy can significantly affect the SGC especially under a specific grain orientation thus the corrosion resistance of deformed grains can be increased.",

keywords = "Al-Cu-Li alloy, Grain orientation, Localised corrosion, Recrystallize characteristic",

author = "Liu, \{Dan yang\} and Sang, \{Feng jian\} and Li, \{Jin feng\} and Nick Birbilis and Wang, \{Zhi xiu\} and Ma, \{Yun long\} and Zhang, \{Rui feng\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Inc.",

year = "2019",

month = dec,

doi = "10.1016/j.matchar.2019.109981",

language = "English",

volume = "158",

journal = "Materials Characterization",

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TY - JOUR

T1 - The role of grain structure characteristics on the localised corrosion feature in the 1445 Al-Cu-Li alloy

AU - Liu, Dan yang

AU - Sang, Feng jian

AU - Li, Jin feng

AU - Birbilis, Nick

AU - Wang, Zhi xiu

AU - Ma, Yun long

AU - Zhang, Rui feng

PY - 2019/12

Y1 - 2019/12

N2 - The corrosion behavior of the 1445 aged alloy was studied by analysis of microstructure characteristics and grain structure characteristics achieved from TEM, STEM, and EBSD. Three corrosion modes including intergranular corrosion (IGC), sub-intergranular corrosion (SIGC), and sub-intragranular corrosion (SGC) were found in the aged samples. In contrast with the conventional Al-Cu-Li alloy, the increased corrosion resistance was derived from the lower chemical potential difference between δ′ phase in matrix and S′ phase at GBs. The grain stored energy can significantly affect the SGC especially under a specific grain orientation thus the corrosion resistance of deformed grains can be increased.

AB - The corrosion behavior of the 1445 aged alloy was studied by analysis of microstructure characteristics and grain structure characteristics achieved from TEM, STEM, and EBSD. Three corrosion modes including intergranular corrosion (IGC), sub-intergranular corrosion (SIGC), and sub-intragranular corrosion (SGC) were found in the aged samples. In contrast with the conventional Al-Cu-Li alloy, the increased corrosion resistance was derived from the lower chemical potential difference between δ′ phase in matrix and S′ phase at GBs. The grain stored energy can significantly affect the SGC especially under a specific grain orientation thus the corrosion resistance of deformed grains can be increased.

KW - Al-Cu-Li alloy

KW - Grain orientation

KW - Localised corrosion

KW - Recrystallize characteristic

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U2 - 10.1016/j.matchar.2019.109981

DO - 10.1016/j.matchar.2019.109981

M3 - Article

SN - 1044-5803

VL - 158

JO - Materials Characterization

JF - Materials Characterization

M1 - 109981

ER -

The role of grain structure characteristics on the localised corrosion feature in the 1445 Al-Cu-Li alloy

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