Learn how the changes in the grain size affect the mechanical properties.
Grain Size Strengthening Mechanisms
Full Code
MET0201220
Module Type
E-learning
Description
Recall that dislocations can only move along particular crystallographic planes, slip planes, and in the lattice, and require only a small force, the Peierls force, to start moving. Once in motion, they continue along slip planes until they reach the external surface of the crystal (or Grain Boundary) or some other obstacle creating plastic deformation in the test piece. In this module the grain size strengthening will be introduced. You will be able to select the correct values of ky and σ0. The relationship between ky and σ0 will be explained.
At the end of the second section, a calculation of yield strength will be used.
Finally, the recommended values for ky and σ0 will be showed.
What you will learn
- Describe the grain size strengthening mechanisms and the variability of Hall-Petch constants.
Module content
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