1. Preparing the Specimen
Start with a standard rectangular test bar, typically 10x10x50 mm.
Use a broaching machine to create a precise notch in the sample.
Insert the sample into the broaching machine.
Close the shields for safety.
The vertical broaching knife will cut the notch to the required depth and shape.
Remove the sample and inspect the notch.
2. Conditioning the Specimen
For temperature-based testing, place the notched sample in a chilling machine.
The chiller can cool samples down to -50°C or heat them up to +200°C.
Leave the sample in the chiller for the specified duration to ensure uniform temperature.
Transfer the sample from the chiller to the impact tester within 5 seconds to maintain temperature integrity.
3. Loading the Specimen into the Impact Tester
Open the impact tester's chamber door.
Use tongs to handle cold samples and place them in the automatic centering device.
The device ensures the sample is perfectly aligned in the Charpy test fixture.
Close the chamber door to lock the sample in place.
4. Setting Up the Pendulum Hammer
The pendulum impact tester has a hammer that is electronically retracted to its highest position.
The system calculates the initial potential energy (PE = mgh), which is used to determine the energy absorbed by the specimen.
5. Conducting the Impact Test
Press the start button on the impact tester.
The hammer is released, swinging down and striking the notched sample.
The notch helps concentrate stress, leading to fracture propagation.
After impact, the hammer swings to a new height, which is used to measure remaining energy.
6. Recording and Analyzing Test Results
The impact energy absorbed by the sample is displayed on the system in Joules (J).
The machine determines brittle vs. ductile failure:
Brittle materials: Clean break with low energy absorption.
Ductile materials: Heavy plastic deformation with high energy absorption.
The system stores test data automatically in the Lab Test 4.0 software.
Results can be exported via USB or Ethernet for further analysis and reporting.
7. Generating Test Reports
The software can graph multiple test results and generate batch reports for easy comparison.
Users can customize reports based on:
Material type
Temperature conditions
Impact energy levels
The system also supports remote diagnostics for troubleshooting.
This guide ensures precise and repeatable Charpy impact testing using ASTM E23 standards.
If you have any questions, visit our site here: www.universalgripco.com
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