Location

Snowbird, UT, USA

Start Date

1-1-1999 12:00 AM

Description

Material degradation due to pitting corrosion and fatigue crack initiation from pits may trigger widespread fatigue damage in aging aircraft structures. Since corrosion damage is often hidden, the corrosion pits and initiated cracks can remain undetected by surface inspection techniques for long service periods. Therefore, the ability to predict the initiation and propagation of surface damage originating from pitting corrosion is of great importance for the timely maintenance of aging airplanes [1]. Recently, we reported a microradiographic method quantifying pitting corrosion [2] and fatigue life prediction model [3] based on the measured pit depth. These have been applied successfully to A1-2024-T3 alloy.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

18B

Chapter

Chapter 8: Process Control, Reliability, and Training

Section

Process Control

Pages

2225-2233

DOI

10.1007/978-1-4615-4791-4_285

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

In-Situ Surface Acoustic Wave Monitoring of Fatigue Crack Initiation and Propagation

Snowbird, UT, USA

Material degradation due to pitting corrosion and fatigue crack initiation from pits may trigger widespread fatigue damage in aging aircraft structures. Since corrosion damage is often hidden, the corrosion pits and initiated cracks can remain undetected by surface inspection techniques for long service periods. Therefore, the ability to predict the initiation and propagation of surface damage originating from pitting corrosion is of great importance for the timely maintenance of aging airplanes [1]. Recently, we reported a microradiographic method quantifying pitting corrosion [2] and fatigue life prediction model [3] based on the measured pit depth. These have been applied successfully to A1-2024-T3 alloy.