The forces of chemical bonding causes this repetition. A crystal lattice is a repeating pattern of mathematical points that extends throughout space. In metals, and in many other solids, the atoms are arranged in regular arrays called crystals. See also: Hardness of Materials Iridium – Crystal StructureĪ possible crystal structure of Iridium is face-centered cubic structure. Iridium is has a hardness of approximately 6.25. The Mohs scale of mineral hardness is based on the ability of one natural sample of mineral to scratch another mineral visibly. The most common scale for this qualitative test is Mohs scale, which is used in mineralogy. Scratch hardness is the measure of how resistant a sample is to permanent plastic deformation due to friction from a sharp object. Vickers hardness of Iridium is approximately 1760 MPa.

The Vickers hardness test method can be also used as a microhardness test method, which is mostly used for small parts, thin sections, or case depth work. Sandland at Vickers Ltd as an alternative to the Brinell method to measure the hardness of materials. The Vickers hardness test method was developed by Robert L. In Brinell tests, a hard, spherical indenter is forced under a specific load into the surface of the metal to be tested.īrinell hardness of Iridium is approximately 1670 MPa. Brinell hardness test is one of indentation hardness tests, that has been developed for hardness testing. In materials science, hardness is the ability to withstand surface indentation ( localized plastic deformation) and scratching. The Young’s modulus of elasticity of Iridium is N/A. Ultimate tensile strength of Iridium is 2000 MPa. See also: Strength of Materials Ultimate Tensile Strength of Iridium Yield strength or yield stress is the material property defined as the stress at which a material begins to deform plastically whereas yield point is the point where nonlinear (elastic + plastic) deformation begins. Strength of a material is its ability to withstand this applied load without failure or plastic deformation.įor tensile stress, the capacity of a material or structure to withstand loads tending to elongate is known as ultimate tensile strength (UTS). In designing structures and machines, it is important to consider these factors, in order that the material selected will have adequate strength to resist applied loads or forces and retain its original shape. Strength of materials basically considers the relationship between the external loads applied to a material and the resulting deformation or change in material dimensions. In mechanics of materials, the strength of a material is its ability to withstand an applied load without failure or plastic deformation.

Iridium metal type