3. Phase A phase is a homogeneous part of the material in which no abrupt change in composition, structure and properties occurs An alloy may be single phase or multi-phase material 4. Structure Structure is a general term for the combination of atom arrangement including the types amounts and distribution of all types of material as well as grain size, defect etc
3. Phase A phase is a homogeneous part of the material in which no abrupt change in composition, structure and properties occurs. An alloy may be single phase or multi-phase material. 4. Structure Structure is a general term for the combination of atom arrangement including the types amounts and distribution of all types of material as well as grain size, defect etc
ll. Classification of al loy phases 1. According to structure Solid Solution Compound In Solid Solution, atoms of different component share a common lattice in variable proportion
◆ Ⅲ. Classification of Alloy Phases 1. According to structure Solid Solution Compound In Solid Solution, atoms of different component share a common lattice in variable proportion
oOOOOOOOCu oOOOOOOOCu Solid solution 0000Q of Zn in cu Compound of Cu and zn
2. According to position of ine alloy in_prase diagram erminal ss Intermediate SS + or secondary Ss A B
2. According to position of the alloy in phase diagram Terminal S.S. Intermediate S.S. or secondary S.S. α A B β α+β
83. 2 Factors Affecting the Structure of Alloy Phase 1. What is size factor metallic radi AB Atomic ionic radi r++r-=d radii covalent radii single bond radius Van der Waals radii
§3.2 Factors Affecting the Structure of Alloy Phase 1. What is size factor metallic radii rA+rB =d ionic radii r ++r- =d covalent radii single bond radius Van der Waals radii Atomic radii