ALLOY SET OF 20

ALLOY SET OF 20

(Wikipedia excerpt: ..."...An alloy is a mixture of chemical elements of which in most cases at least one is a metallic element, although it is also sometimes used for mixtures of elements; herein only metallic alloys are described. Most are metallic and show good electrical conductivity, ductility, opacity, and luster, and may have properties that differ from those of the pure elements such as increased strength or hardness. In some cases, an alloy may reduce the overall cost of the material while preserving important properties. In other cases, the mixture imparts synergistic properties such as corrosion resistance or mechanical strength.

...the atoms are joined by metallic bonding rather than by covalent bonds typically found in chemical compounds. The constituents are usually measured by mass percentage for practical applications, and in atomic fraction for basic science studies. ...are usually classified as substitutional or interstitial alloys, depending on the atomic arrangement that forms ... They can be further classified as homogeneous (consisting of a single phase), or heterogeneous (consisting of two or more phases) or intermetallic... may be a solid solution of metal elements (a single phase, where all metallic grains (crystals) are of the same composition) or a mixture of metallic phases (two or more solutions, forming a microstructure of different crystals within the metal...")