Explanation

There are different interface energies between different structures, and these structures and energies have a very important impact on the properties of metals and alloy. According to the arrangement of atoms on the interface, these interfaces can be divided into three types: one is the coherent plane, which is similar to the coherent twin boundary, where the atoms on the interface occupy the positions of two different crystal lattice at the same time. In order to maintain the coherent interface, special crystallographic orientation relationship between two different phase is required, which is reflected in the formation of GP zone in aluminum copper alloy; The second is an interface without any coherent relationship, which is called a non coherent interface; The third is the phase boundary that uses edge dislocation to maintain cohesiveness, which is called semi coherent phase boundary. In steel, this semi coherent phase boundary is relatively common during the formation of martensite and epitaxial growth. These interface types have significant effects on the properties and properties of materials.

Classification