Degree of dispersion
Degree of dispersion measures the fineness and spacing of fine phases in the metal matrix. A high degree of dispersion increases hardness by hindering dislocation movement.
Physicochemical mechanism of action
The degree of dispersion refers to the size and arrangement of finely distributed phases or precipitates in the metal structure. These fine phases can be various chemical additives or metals that form during the melting process.
Metallurgical relevance & risks in welding
A high degree of dispersion increases the mechanical hardness of the material because the fine phases hinder dislocation movement within the metal. However, this can also lead to increased susceptibility to stress corrosion cracking and to cracks or fractures in the material when it is under high mechanical stress.
Workshop practice & action instructions
To optimize the degree of dispersion, it is important to precisely control the melting processes. This includes temperature management during melting and cooling as well as the selection of suitable additives or metals. A high degree of dispersion can be achieved through careful control of these processes to increase both hardness and mechanical stability of the material.