MAT E202 Lecture Notes - Lecture 14: Burgers Vector, Intermetallic, Stoichiometry

• School: University of Alberta
• Department: Materials Engineering
• Course: MAT E202
• Professor: Thomas Etsell

Document Summary

Exceptions include nickel in coins, copper in wiring. Two or more metals mixed together form alloys. Three most common are brass (copper and zinc), steel (iron and carbon), bronze (copper and tin) Second element is incorporated (dissolved) into the lattice of the first by forming either: The second atom has to be relatively small. The edge of an extra plane of atoms appearing in the crystal structure due to. Its presence causes local stresses in the crystal compression above dislocation line and tension below it. When you trace a square of atoms you will not return to the starting one. The vector joining the starting and finishing points is the burgess vector. Dislocation line is perpendicular to the vector (applied shear force) Formed by a shearing action by moving part of one plane across another. Dislocation line is the pivotal line of atoms about which the shear occurs (p. 116) Surface atoms have extra energy as fewer bonds have formed.