testing capabilities
Eddy Current Testing (ET)
Eddy Current Testing (ET) is a non-destructive testing (NDT) method that uses electromagnetic induction to detect surface and near-surface flaws in conductive materials. When an alternating current flows through a coil, it creates a magnetic field that induces circulating currents (eddy currents) in the test material. Disruptions to these currents caused by cracks, corrosion, or changes in material properties are measured and displayed, revealing potential defects.
How the Test is Performed
Preparation – The fastener or component is cleaned to remove dirt, grease, or coatings that might affect results.
Coil Excitation – A probe containing a coil is energized with alternating current, generating a magnetic field.
Induction of Eddy Currents – As the probe is placed near the conductive material, eddy currents are induced within the component.
Disruption Detection – Any discontinuities, such as cracks or changes in material thickness, disrupt the flow of eddy currents.
Signal Analysis – Variations in the currents are detected by the probe and displayed for interpretation by skilled inspectors.
Documentation – Results are recorded to verify compliance and provide traceability.
Why It is Performed
Eddy Current Testing is performed because it is fast, highly sensitive, and effective for detecting surface cracks, corrosion, and material variations without damaging the part. Unlike some other methods, ET requires minimal surface preparation and can often be performed quickly on complex shapes, making it well-suited for fasteners and precision components.
Detects cracks, corrosion, and material inconsistencies
Can measure conductivity, hardness, and coating thickness
Provides rapid results without the need for couplants or extensive cleaning
Application to Engineered Fasteners
For engineered fasteners, ensuring surface integrity and consistent material properties is critical. Fasteners must endure heavy loads, vibration, and environmental exposure in industries such as aerospace, energy, and defense. A surface crack or metallurgical inconsistency can lead to early failure in service.
By applying Eddy Current Testing, TSP Manufacturing ensures:
Detection of surface cracks and flaws before components enter service
Verification of proper material properties and heat treatment
Consistency in quality across high-volume production runs
Confidence in the long-term reliability of safety-critical fasteners
Standards & Compliance
TSP Manufacturing performs Eddy Current Testing in accordance with ASTM, ASME, and industry-specific standards, as well as customer-driven requirements. Our inspectors are trained and certified to recognized NDT programs, ensuring accuracy and consistency in every inspection. This adherence to standards reinforces our reputation for quality and provides customers with assurance that our engineered fasteners and machined components meet the highest levels of reliability and compliance.
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