Engineering Materials and Metallurgy: Unit V: Mechanical Properties And Testing
Hardness Tests
Definition, Types, Common Principle | Mechanical Test of Metal
Hardness defined: Hardness may be defined as the ability of a material to resist scratching, abrasion, cutting or penetration.
HARDNESS TESTS ✔ Hardness defined: Hardness may be defined as the ability of a material to resist scratching, abrasion, cutting or penetration. ✔ The hardness test is performed on a material to know its resistance against indentation and abrasion. The three most commonly used hardness tests are : 1. Brinell hardness test, 2. Vickers hardness test, and 3. Rockwell hardness test. The three hardness tests have the same basic principle as below : The hardness is measured from an indentation produced in the component by applying a constant load on a specific indenter in contact with the surface of the component for a fixed time. In other words, an indenter is pressed into the surface of the material by a slowly applied known load, and the extent of the resulting impression is measured mechanically or optically. A large impression for a given load and indenter indicates a soft material, and a small impression indicates a hard material.1. Types of Hardness Tests
2. Basic Common Principle
Engineering Materials and Metallurgy: Unit V: Mechanical Properties And Testing : Tag: : Definition, Types, Common Principle | Mechanical Test of Metal - Hardness Tests
Engineering Materials and Metallurgy: Unit V: Mechanical Properties And Testing
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