Category: Strengthening Of Metal Alloys

A perfect crystal structure exists when all the atoms are arranged in order through the entire material. When this occurs the metal has extraordinarily high strength. However, the crystal structure is rarely perfect, and instead contains imperfections that reduce the strength. For instance, the theoretical strength of pure aluminium is about 4600 MPa whereas the actual… Continue reading Defects in crystal structures

The atoms in solid metals are arranged in an ordered and repeating lattice pattern called the crystal structure. A crystalline material consists of a regular array of atoms that is repeated over a long distance compared with the atomic size. A simple analogy is the stacking of oranges in a grocery store, with each orange… Continue reading Crystal structure of metals

Metal alloys used in aircraft structures and engines must have high mechanical properties to ensure weight-efficiency. It is essential that metals used in aircraft have sufficient strength to avoid permanent deformation and damage under the structural, aerodynamic and other loads experienced during flight. The mechanisms by which aerospace metals achieve their high strength are complex.… Continue reading Introduction