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Dislocation Strengthening
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Module of
Dislocation Strengthening

Master strain ageing and dislocation-strengthening principles in steel through advanced simulations, theory, and mechanical property analysis.

Ferrous Metallurgy
Dislocation Strengthening
Ferrous Metallurgy
steeluniversity
steeluniversity

Ferrous Metallurgy

Dislocation Strengthening

Full Code

MET0203210

Module Type

E-learning

Description

Short description:
Understand strain-ageing kinetics and how dislocation interactions enhance steel strength through thermal and mechanical effects.

Long description:
This module investigates the kinetics of strain ageing in steel and the associated strengthening mechanisms. It focuses on the diffusion of solutes toward dislocations, the Cottrell-Bilby theory, and how temperature and ageing duration influence mechanical properties. Learners study dynamic and substitutional strain ageing, the formation of Lüders bands, and their effects on yield point reappearance. Through practical analysis of the Holloman equation and Taylor’s model, the module explains how dislocation intersections contribute to work hardening. Using simulations and mechanical data interpretation, participants explore embrittlement, solute diffusivity, and strengthening behavior under various strain-ageing conditions.

What you will learn

- Interpret the role of solute diffusion in strain-ageing processes and its impact on dislocation immobilisation.
- Apply Cottrell-Bilby theory to analyze temperature-dependent strain-ageing behavior.
- Evaluate dislocation intersection mechanisms and their contribution to work hardening.
- Use Holloman and Taylor equations to model the impact of plastic deformation on steel properties.
- Assess mechanical property variations caused by different strain-ageing temperatures.

Module content
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Learning Outcomes

  • Understands the principles of alloying to create steel with desired properties.
    2
  • Able to select and design steel alloys for specific applications, considering factors like strength, corrosion resistance, and heat resistance.
    3
  • Able to analyse steel microstructures to assess material properties.
    2

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