indenter (rus. индентор) — a solid object of specific geometric shape (sphere, cone or pyramid) and size that is pressed into the surface of the studied material under a given load or own weight to measure the hardness, yield strength, elasticity modulus and other properties of the material.

Description

An indenter is used to determine mechanical properties of the sample by pressing it into the studied surface. Indenters differ by the shape of their tips. The tips used for indentation usually have a conical, pyramidal, spherical, cylindrical, or wedge shape. Also worth noting are the cube-corner indenter with the shape of a three-sided pyramid with mutually perpendicular faces, the Berkovich indenter with an angle of 65.03 deg. between the axis and a face that is used for measuring micro-hardness, scratch hardness, yield stress, and the Vickers indenter with the shape of a four-sided diamond pyramid with a square base and an apex angle between opposite edges of 136 deg. Indenter tips are usually made of diamond, sapphire, hard alloys, etc. Producing one requires very high accuracy, which currently can be provided only by a laser goniometer.

Illustrations

The general construction (a) and different types of indenters: (b) Berkovich indenter, (c) a co
The general construction (a) and different types of indenters: (b) Berkovich indenter, (c) a conical indenter, (d) Vickers indenter.

Authors

  • Goryacheva Irina G.
  • Shpenеv Alexey G.

Source

  1. Mirkin L.I. The physical basis of strength and ductility (in Russian). — M.: Izd-vo MGU, 1969.

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