Hardness

Diagram of a stress-strain curve, showing the relationship between stress (force applied per unit area) and strain or deformation of a ductile metal.

A representation of the crystal lattice showing the planes of atoms.

Planes of atoms split by an edge dislocation.

Hardness is a measure of how resistant solid matter is to various kinds of permanent shape change when a compressive force is applied. Some materials, such as metal, are harder than others. Macroscopic hardness is generally characterized by strong intermolecular bonds, but the behavior of solid materials under force is complex; therefore, there are different measurements of hardness: scratch hardness, indentation hardness, and rebound hardness.

单词	Surface hardness
释义	Surface hardness 英语例句库 Ungula and ring fracture are due to higher surface hardness.The rational suggestions to settle fracture are put forward. 爪形和环形断裂由表面硬度偏高造成,并提出解决断裂问题的合理化建议。英语百科 Hardness Hardness is a measure of how resistant solid matter is to various kinds of permanent shape change when a compressive force is applied. Some materials, such as metal, are harder than others. Macroscopic hardness is generally characterized by strong intermolecular bonds, but the behavior of solid materials under force is complex; therefore, there are different measurements of hardness: scratch hardness, indentation hardness, and rebound hardness.
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Surface hardness

Hardness