MATLS 1M03 Study Guide - Final Guide: Hot Working, Grain Boundary, Ductility

• School: McMaster University
• Department: Materials Science and Engineering
• Course: MATLS 1M03
• Professor: Andre Phillion

Document Summary

Basic concepts: on a microscopic level, plastic deformation corresponds to the motion of dislocations in response to an externally applied shear stress. Its units are per square millimeter: for an edge dislocation, tensile, compressive, and shear strains exist in the vicinity of the dislocation line. Shear lattice strains only are found for pure screw dislocations. Slip systems: the motion of dislocations in response to an externally applied shear stress is termed slip, slip occurs on specific crystallographic planes and within these planes only in certain directions. A slip system represents a slip plane slip direction combination: operable slip systems depend on the crystal structure of the material. Slip in single crystals: resolved shear stress is the shear stress resulting from an applied tensile stress that is resolved onto a plane that is neither parallel nor perpendicular to the stress direction.