Indentation Diameter
The indentation diameter is the diameter of the spherical impression formed during the Brinell test. It is used to calculate the Brinell hardness.
Physico-Chemical Mechanism of Action
The Brinell test involves pressing a spherical indenter into the metal surface. The diameter of this impression is measured as the indentation diameter.
Metallurgical Relevance & Welding Risks
The indentation diameter gives an indication of the hardness of the weld and surrounding material. A too-large indentation diameter may indicate excessive wear or insufficient hardness, while a small diameter could indicate high hardness or inadequate wear.
Workshop Practice & Instructions
For the Brinell test, a 10 mm diameter indenter and a load of 3,000 kg are used. The indentation diameter is measured in millimeters and used to calculate Brinell hardness (HB): HB = 500 * F / D², where F is the load and D is the indenter diameter.