Chapter 7.7

Chapter 7.7 - Dislocation density Grain growth Lattice...

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31 MSE 2090: Introduction to Materials Science Chapter 7, Strengthening Grain growth ¾ If deformed polycrystalline material is maintained at annealing temperature following complete recrystallization, then further grain growth occurs. ¾ Driving force is reduction of the total grain boundary area and, hence, the energy of the system. Big grains grow at the expense of the small ones. ¾ Grain growth during annealing occurs in all polycrystalline materials (i.e. they do not have to be deformed or undergo recrystallization first). ¾ Boundary motion occurs by short range diffusion of atoms across the grain boundary strong temperature dependence of the grain growth.
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32 MSE 2090: Introduction to Materials Science Chapter 7, Strengthening Summary ¾ Cold working ¾ Critical resolved shear stress
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Unformatted text preview: Dislocation density Grain growth Lattice strain Recovery Recrystallization Recrystallization temperature Resolved shear stress Slip Slip system Strain hardening Solid-solution strengthening Make sure you understand language and concepts: 33 MSE 2090: Introduction to Materials Science Chapter 7, Strengthening Reading for next class: Chapter 8: Failure Mechanisms of brittle vs. ductile fracture Basic principles of fracture mechanics Fatigue (cyclic stresses) Crack initiation and propagation Creep (time dependent deformation) Optional reading (Parts that are not covered / not tested): 8.6 Fracture toughness testing 8.11 Environmental effects 8.14 Data extrapolation methods...
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This note was uploaded on 02/14/2012 for the course MSE 2090 taught by Professor Leoindzhiglei during the Fall '10 term at UVA.

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Chapter 7.7 - Dislocation density Grain growth Lattice...

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