GEIT-21001-SD299.pdf

- Mobile Hardness Testing by GE Inspection Technologies offers quick and economical on-site testing, supplementing stationary methods.
- Three primary methods are used: Ultrasonic Contact Impedance (UCI), Rebound, and Through-Indenter-Viewing (TIV).
- GE's instruments for mobile hardness testing include DynaPOCKET, DynaMIC, MIC 10, MIC 20, and TIV.
- Hardness in metals is a measure of resistance to permanent deformation, with varying definitions and testing methods.
- Hardness testing is crucial for quality control, ensuring material properties meet required standards.
- UCI method (MIC 10, MIC 20) uses ultrasonic probes to measure hardness via impedance changes.
- Rebound method (DynaPOCKET, DynaMIC, MIC 20) measures hardness by analyzing the rebound of an indenter.
- TIV method uses an optical system to view indentation and measure hardness.
- Selection of method depends on test problem, component size, accessibility, and required precision.
- Factors influencing measured values include surface preparation, part mass, thickness, and surface quality.
- Calibration and performance verification are essential for accurate and reliable testing.
- Guide helps users choose the suitable test method based on their specific needs and provides practical examples, such as testing in heat-affected zones (HAZ) of welds.