Engineering Materials and Metallurgy: Unit 0: Review of Crystal Physics
Line Defects (or Dislocations)
Definition, Causes, Types | Crystal Defects or Imperfections
The defects, which take place due to dislocation or distortion of atoms along a line, in some direction, are called as line defects.
LINE DEFECTS (OR DISLOCATIONS) ✓ The defects, which take place due to dislocation or distortion of atoms along a line, in some direction, are called as line defects. ✓ Line defects are also called dislocations. In the geometric sense, they may be called as one dimensional defects. ✓ Dislocations are caused due to the following reasons: (i) Growth accidents, (ii) Internal thermal stress, (iii) External stresses causing plastic flow, (iv) Phase transformations, (v) Segregation of atoms causing mismatches, etc. ✓ The two basic types of dislocations are: (a) Edge dislocation, and (b) Screw dislocation. These dislocations are responsible for the useful property of ductility in metals, ceramics and polymers.1. What are Line Defects?
2. Causes of Dislocations
3. Types of Dislocations
Engineering Materials and Metallurgy: Unit 0: Review of Crystal Physics : Tag: : Definition, Causes, Types | Crystal Defects or Imperfections - Line Defects (or Dislocations)
Engineering Materials and Metallurgy: Unit 0: Review of Crystal Physics
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Engineering Materials and Metallurgy
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