PENGUJIAN MATERIAL - Impact Test

Summary

This video presents a demonstration of an impact test on a brass sample, explaining the tools and procedures involved. The purpose of the test is to measure the impact resistance of metals and analyze the fracture surface. The process involves using a pendulum to deliver a controlled impact, with the results showing that the brass sample exhibits brittle behavior, as indicated by the type of fracture observed. The test energy is measured at 40 joules. The presentation concludes with a detailed walkthrough of the procedure and a summary of the results, offering valuable insights into impact testing in metallurgy.

Takeaways

• 😀 The video introduces a group of students from the Metallurgy and Material Department at UI University, Indonesia, presenting a demonstration of impact testing.
• 😀 The main purpose of the impact test is to determine the impact energy of a metal and analyze the fracture surface of the tested metal.
• 😀 The students will perform an impact test using the Charpy method, a well-known testing technique in materials science.
• 😀 Key equipment includes a large pendulum for applying impact, a brake system for stopping the pendulum, and a sample holder.
• 😀 The test uses a brass sample, which is placed with a notch in the center to ensure accurate results.
• 😀 The procedure involves raising the pendulum to a certain height, aligning the scale, and ensuring safety precautions to prevent accidents.
• 😀 The pendulum is released to strike the sample, after which the energy used is measured using the scale indicator.
• 😀 After conducting the impact test, the fracture surface of the brass sample is observed to identify whether the sample is brittle or ductile.
• 😀 The energy measured from the test is found to be 40 Joules, indicating the metal's brittle nature based on the fracture pattern.
• 😀 The students complete the testing by resetting the pendulum and preparing for the next test cycle, ensuring proper operation of the equipment.
• 😀 The presentation concludes with the hope that the video provides valuable insights into the Charpy impact test and its applications in material science.

Q & A

What is the purpose of the impact test discussed in the video?

The purpose of the impact test is to determine the impact value of a metal and analyze the fracture surface of the tested material.

What is the method used for the impact test in this demonstration?

The impact test is performed using the Charpy method.

What equipment is used in the Charpy impact test?

The equipment includes a large pendulum, a braking device, an energy scale indicator, a sample holder, and the sample material itself (in this case, brass).

How is the pendulum used in the impact test?

The pendulum is raised to a certain height and then released to strike the sample, with the energy scale indicating the energy released during the impact.

What safety precautions are taken during the impact test?

It is essential that no one stands beside the equipment during testing, as the impact could be hazardous.

What does the small red needle on the energy scale indicate during the test?

The small red needle shows the energy level at which the pendulum strikes the sample, providing the impact value.

How is the sample prepared for the impact test?

The sample, in this case brass, is positioned with its notch properly aligned at the center using a guide tool to ensure accurate placement.

What happens after the pendulum strikes the sample?

After the pendulum strikes the sample, the braking mechanism is activated to stop the pendulum from swinging further, ensuring safety and accuracy.

What is the significance of the fracture surface observed on the sample?

The fracture surface observed on the sample helps determine whether the material is brittle or ductile. In this case, the fracture surface indicates that the sample is brittle.

What is the energy value obtained from the test, and how is it used?

The energy value obtained from the test is 40 Joules, which is used to calculate and analyze the material's toughness and resistance to impact.