Mechanical Behavior of Materials

4.

Dislocation Theory and Strengthening Mechanisms

4.1.

Crystalline Materials and Defects

4.1.1.

Crystal Structures

4.1.1.1.

Face-Centered Cubic

4.1.1.2.

Body-Centered Cubic

4.1.1.3.

Hexagonal Close-Packed

4.1.2.

4.1.2.1.

4.1.2.2.

4.1.2.3.

Substitutional Atoms

4.1.3.

4.1.3.1.

Edge Dislocations

4.1.3.2.

Screw Dislocations

4.1.3.3.

Mixed Dislocations

4.1.4.

4.1.4.1.

Grain Boundaries

4.1.4.2.

Twin Boundaries

4.1.4.3.

Stacking Faults

4.2.

Dislocations and Plastic Deformation

4.2.1.

4.2.1.1.

4.2.1.2.

Slip Directions

4.2.1.3.

Critical Resolved Shear Stress

4.2.2.

Dislocation Characteristics

4.2.2.1.

4.2.2.2.

Dislocation Line Direction

4.2.3.

Dislocation Motion

4.2.3.1.

Glide Mechanisms

4.2.3.2.

Climb Mechanisms

4.2.4.

Stress Fields around Dislocations

4.2.4.1.

Elastic Distortion

4.2.4.2.

Interaction with Other Defects

4.2.5.

Dislocation Interactions

4.2.5.1.

Dislocation Multiplication

4.2.5.2.

Frank-Read Source

4.2.5.3.

Dislocation Pile-Ups

4.3.

Strengthening Mechanisms in Metals

4.3.1.

Strain Hardening

4.3.1.1.

Dislocation Density Increase

4.3.1.2.

Work Hardening Mechanisms

4.3.2.

Grain Size Reduction

4.3.2.1.

Grain Boundary Strengthening

4.3.2.2.

Hall-Petch Relationship

4.3.2.3.

Hall-Petch Equation

4.3.3.

Solid Solution Strengthening

4.3.3.1.

Substitutional Solutes

4.3.3.2.

Interstitial Solutes

4.3.3.3.

Lattice Distortion Effects

4.3.4.

Precipitation Hardening

4.3.4.1.

Precipitate Formation

4.3.4.2.

Coherency Effects

4.3.4.3.

4.3.5.

Dispersion Strengthening

4.3.5.1.

Non-coherent Particle Strengthening

4.3.5.2.

Orowan Mechanism

Previous

3. Plastic Deformation

Go to top

Next

5. Fracture Mechanics