A Micro Vickers Hardness Tester is a specialized instrument used to measure the hardness of materials, especially thin or small specimens, at a microscopic level. This type of hardness tester is based on the Vickers hardness test method but is specifically designed for micro-indentation testing. Here's an overview of what a Micro Vickers Hardness Tester is and how it works:
Principle of Operation: The Micro Vickers Hardness Tester operates on the principle of measuring the indentation hardness of a material. It does this by applying a known force to a diamond indenter that has a specific geometric shape (usually a square-based pyramid with a 136-degree angle between faces). This indenter is pressed into the surface of the material under test, creating a small, precise indentation.
Measurement of Indentation: After the indentation is made, the Micro Vickers Hardness Tester measures the diagonals of the resulting impression, typically using a microscope or an optical system. These diagonals are used to calculate the Vickers hardness value of the material.
Calculation of Hardness: The Vickers hardness value is determined using the formula:
Vickers Hardness (HV) = 1.854 * (Applied Force / (Diagonal Length^2))
The result is typically expressed in units such as Vickers hardness number (HV), where the applied force is usually specified in newtons (N).
Applications: Micro Vickers Hardness Testers are used in various industries, including materials science, metallurgy, manufacturing, and quality control. They are particularly useful for testing small or delicate samples, thin coatings, and microstructures where traditional Vickers or Brinell hardness testing may not be suitable.
Advantages: Some of the advantages of using Micro Vickers Hardness Testers include high precision, the ability to test small areas, and minimal sample preparation. They are commonly used for research and quality control purposes.
Standards: Micro Vickers hardness testing often complies with industry standards and specifications to ensure accuracy and consistency in hardness measurements. Learn More from our YouTube Video!