SSC MTS EXAM

Detailed explanation-1: -In materials science, a grain boundary is the interface between two grains, or crystallites, in a polycrystalline material. Grain boundaries are two-dimensional defects in the crystal structure, and tend to decrease the electrical and thermal conductivity of the material.

Detailed explanation-2: -Grain boundaries have two types, as per their orientation: Low-angle grain boundaries are those with a misorientation less than about 11 degrees. High-angle grain boundaries are whose misorientation is greater than about 11 degrees.

Detailed explanation-3: -In materials science, intergranular corrosion (IGC), also known as intergranular attack (IGA), is a form of corrosion where the boundaries of crystallites of the material are more susceptible to corrosion than their insides.