Vickers Hardness Test Procedures

The video tutorial explains the Vickers hardness test, a method used to measure the hardness of materials like a compressor wheel for a turbocharger. The process involves using a diamond indenter to create an indentation on the test piece, followed by measuring the indentation to calculate the hardness value. The tutorial covers the preparation of the testing machine, the execution of the test, and the calculation of the hardness value, providing a comprehensive guide to performing the Vickers hardness test.

What is the main principle behind the Vickers hardness test?

• Pressing a cube-shaped diamond indentor with a defined force onto the test piece

• Using a cylindrical indentor to press onto the test piece

• Pressing a pyramid-shaped diamond indentor with a defined force onto the test piece

• Using a spherical indentor to press onto the test piece

What is the shape of the Vickers indentor?

• Spherical

• Cylindrical

• Pyramid-shaped

• Cube-shaped

What is the first step in preparing the testing machine?

• Placing the test piece on the support table

• Adjusting the height of the support table

• Inserting the Vickers indentor into the mounting device

• Rotating the microscope lens into position

How does the tester ensure the test piece surface is in focus?

• By moving the test piece around

• By rotating the microscope lens

• By pressing the start button

• By adjusting the height of the support table

What happens after the start button is pushed?

• The test piece is moved around

• The diamond pyramid touches the test piece surface

• The microscope lens is adjusted

• The test force is decreased

What does the tester do with the control knob?

• Moves the test piece around

• Adjusts the height of the support table

• Starts the test

• Places measuring lines at the corners of the indentation

How is the Vickers hardness value calculated?

• By adding the test force to the area of the indentation

• By dividing the test force by the area of the indentation

• By multiplying the test force by the area of the indentation

• By dividing the test force by the volume of the indentation

What unit is used for the test force in the Vickers hardness test?

• Newton

• Kilogram

• Pascal

• Kilopond

Where is the Vickers hardness value displayed?

• Bottom right corner of the screen

• Top right corner of the screen

• Top left corner of the screen

• Bottom left corner of the screen

What is the Vickers hardness value of the compressor wheel?

• 100

• 175

• 125

• 150