Investigation of Artificial Cracks by Scanning SQUID Magnetic Microscope
Abstract:We have investigated deep defects in structural Al-Ti alloy planar samples used in aeronautical application, by means of eddy current Non-Destructive Evaluation (NDE). The experimental system is a Scanning Magnetic Microscope (SMM) equipped with a high-critical temperature (HTc) dc Superconducting Quantum Interference Device (SQUID) magnetometer characterized by field sensitivity of 20 pT/(Hz)1/2 and spatial resolution of about 50 m. We have detected cracks several millimeters below the surface, keeping relatively high spatial resolution. By mapping the magnetic field distribution, we can localize the sub-surface crack position. The experimental results confirm that this system could be used to detect defects with high resolution for the modeling of fatigue cracks in structures of aeronautical interest.
Document Type: Research Article
Publication date: June 1, 2009
More about this publication?
- The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- ingentaconnect is not responsible for the content or availability of external websites