Visual Detection of Machining Damage on Aerospace Aluminium Alloys during Manufacturing Process

Yan Long Ma; Yi Liao

doi:10.4028/www.scientific.net/AMM.252.302

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 252Visual Detection of Machining Damage on Aerospace...

Visual Detection of Machining Damage on Aerospace Aluminium Alloys during Manufacturing Process

Abstract:

In aerospace industry, chromic acid anodizing (CAA) has been traditionally used as a non-destructive testing (NDT) technique to detect flaws in aluminium alloys. However, with the increasing restriction on the use of chromic acid and the application of lithium-containing aluminium alloys to aircraft structures, the capability of anodizing as a NDT method is challenged. In this work, machining damage was deliberately introduced to an Al-Li-Cu alloy AA2099-T8. Then, the visibility of the machine damage after tartaric-sulphuric acid anodizing (TSAA), which is an environmentally friendly anodizing process, was studied. It is suggested that, with proper lighting condition, it is possible to replace CAA with TSAA for detecting machining damage on lithium-containing aluminium alloys during manufacturing.

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Periodical:

Applied Mechanics and Materials (Volume 252)

Pages:

302-305

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.252.302

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Online since:

December 2012

Authors:

Yan Long Ma, Yi Liao

Keywords:

Alloy, Anodizing, Machining Damage, Manufacturing, Nondestructive Testing (NDT)

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