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Guides & Resources

Learn about non-destructive testing methods and material characterization techniques.

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What is Impulse Excitation Technique (IET)?

A complete guide to the non-destructive method for measuring elastic properties of materials, covering the physics, the practice, and the applications.

IETElastic ModulusStandards
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NDT Methods Compared: IET, Ultrasonic, X-Ray CT

Comparing IET, ultrasonic, X-ray CT, and eddy current testing: cost, throughput, sensitivity, and best applications for each NDT method.

NDTIETQuality Control
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IET vs Destructive Testing: When to Tap, When to Break

When to tap, when to break: how IET correlates with tensile strength, hardness, and fracture data, and where destructive testing remains essential.

IETdestructive-testingcomparison
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How to Measure Elastic Properties with Impulse Excitation

Step-by-step guide to measuring Young's modulus, shear modulus, and Poisson's ratio for rectangular bars, cylinders, and discs.

Elastic ModulusIETStandards
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How to Assess Porosity Non-Destructively

Detect and quantify porosity non-destructively using resonance frequency and damping analysis: gas porosity, lack-of-fusion, and incomplete sintering.

PorosityAdditive ManufacturingQuality Control
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IET Testing for Ceramics, Glass, and Refractories

How IET characterizes ceramics and glass: elastic modulus, damping, and thermal shock detection per ASTM C1259 and EN 843-2.

ceramicsglassrefractories
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IET Testing for Metals, Alloys, and Powder Metallurgy

How IET characterizes steels, cast irons, superalloys, and powder metallurgy parts, from foundry QC to fatigue testing per ASTM E1876.

metallurgymetalsQuality Control
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Testing Cement, Mortar, and Concrete with IET

How IET measures dynamic modulus and damping in concrete per ASTM C215: hydration monitoring, freeze-thaw durability, and fire damage assessment.

cementconcretemortar
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IET for Precision Mechanical Components

IET quality assurance for dental implants, turbine parts, bearings, and precision components. Sub-ppm measurement accuracy per ASTM E1876.

precision-partsceramicsmetals
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Quality Control After Sintering

How IET detects incomplete sintering, porosity, and microcracking in ceramics, powder metallurgy, and AM parts. 100% inspection at 1,000+ parts/hour.

sinteringQuality Controlceramics
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How to Detect Defects in Additively Manufactured Parts

Resonance-based inspection catches porosity, lack-of-fusion, and microstructural anomalies in AM parts. Faster and cheaper than CT scanning.

Additive Manufacturing3d-printingdefect-detection
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IET for Aerospace Materials and Components

How resonance-based testing addresses aerospace quality demands, from AM superalloy fatigue to thermal barrier coatings and radome ceramics.

aerospaceNDTQuality Control
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Concrete Testing: Stiffness and Damping with IET

Dynamic modulus and damping measured by IET reveal microcracking, alkali-silica reaction, and freeze-thaw damage in concrete per ASTM C215.

concretedampingstiffness
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The Use of Impulse Excitation in Glasses and Lenses

IET measures elastic modulus and damping in optical glass per ASTM C623, detecting annealing stress and compositional variation.

glassoptical-materialsQuality Control
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The Science Behind Frequency Peaks and Their Movement

Learn why resonance frequency peaks shift during material testing: stiffness, temperature, defects, and damping effects explained for IET practitioners.

frequency-analysismeasurement-techniqueQuality Control
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Atomic Structure and Microstructure Changes During Sintering

How sintering stages transform powder into dense solids, affecting elastic modulus and damping, and why IET tracks densification non-destructively.

sinteringmaterial-sciencemicrostructure
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From Motion to Modulus: How Vibrations Expose Rigidity

How resonant vibration frequencies reveal Young's modulus: the physics of f proportional to sqrt(E/rho), with practical IET applications.

youngs-modulusvibration-analysisIET
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De-Risking Additive Manufacturing with NDT

NDT methods reduce AM production risk by catching porosity, lack-of-fusion, and residual stress defects. IET screens parts at under $1 each.

Additive ManufacturingNDTquality-assurance
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How Impulses Reveal Material Quality and Strength

What a single tap reveals about material quality: how elastic modulus and damping correlate with strength and detect hidden defects.

resonance-testingmaterial-strengthstiffness
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Grinding Wheels Made It Clear: Why Impulse Excitation Works

How grinding wheel testing in 1960s Belgium launched impulse excitation technique, from subjective ring tests to quantitative E-modulus grading.

grinding-wheelsabrasivesiet-history
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Friction Materials and Brake Pad Testing with IET

How resonant frequency and damping measurement per SAE J2598 enables 100% quality control of brake pads and friction materials.

friction-materialsbrake-padsautomotive
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Grinding and Abrasives Quality Testing

How elastic modulus measurement by IET grades grinding wheels, detects cracks, and enables 100% non-destructive production inspection per EN 12413.

grinding-wheelsabrasivesQuality Control
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Material Research with Impulse Excitation Technique

IET delivers 1 ppm resolution elastic property measurements from room temperature to 1750°C, ideal for tracking phase transitions and material evolution.

material-researchHigh Temperatureelastic-properties
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