Understanding Charpy Impact Test Results: Determining T1 and T2 Temperatures

In summary, the conversation discusses the need for help with the Charpy impact test and determining the transition temperature (T1) and temperature (T2) corresponding to 50% energy and crystallinity change, respectively. The graph attached shows a gradual transition in the energy curve, making it challenging to determine the transition temperature accurately.
  • #1
invincible1
11
0
hey guys i need help charpy impact test. i have attached my graph with the results we had. Does this seem correct? from the graph how do i determine the transition temperature T1 for the material where T1 is normally defined as the temperature corresponding to 50% of energy change between the upper and lower plateaux of the energy curve
and also determine a temperature T2 corresponding to 50% crystallinity change.
Please help
 

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  • #2
in energy curve, it should be increasing, but it doesn't with your values, anyway it seems that the transition is gradual for that material, so it's quite difficult to determine the transition temperature.
 

FAQ: Understanding Charpy Impact Test Results: Determining T1 and T2 Temperatures

1. What is the purpose of the Charpy impact test?

The Charpy impact test is used to measure the amount of energy absorbed by a material when it is subjected to a sudden impact. This test helps determine the toughness and brittleness of a material, and is commonly used to assess the quality of structural materials such as metals and plastics.

2. How is the Charpy impact test performed?

The Charpy impact test involves striking a notched specimen with a pendulum hammer, and measuring the amount of energy absorbed by the specimen as it fractures. The test is typically performed at different temperatures to assess how a material's toughness changes under different conditions.

3. What are the advantages of the Charpy impact test?

The Charpy impact test is relatively simple and inexpensive to perform, making it a popular method for evaluating material properties. It also provides a quick way to compare the toughness of different materials and can be used to detect flaws or weaknesses in a material.

4. What are the limitations of the Charpy impact test?

The Charpy impact test only measures the energy absorbed by a material during a sudden impact, and does not take into account other factors such as how the material responds to gradual stresses. Additionally, the results of the test can be affected by factors such as specimen size, shape, and notch location.

5. How are the results of the Charpy impact test interpreted?

The results of the Charpy impact test are typically reported as the amount of energy absorbed by the specimen in joules (J). A higher value indicates that the material is tougher and has a greater ability to withstand sudden impacts. The results can also be used to calculate the material's impact strength and ductile-to-brittle transition temperature.

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