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Strengthening Processes

Leonardo da Vinci, Helsinki Award 2006, Design and execution: Gerold Fink, Austria. Click to open PDF document about this award

Leonardo Da Vinci Helsinki Award 2006

Leonardo da Vinci, Helsinki Award 2006, Design and execution: Gerold Fink, Austria. Click to open PDF document about this award

Bronze medal for an outstanding project promoting and supporting the LifeLong Learning EU policy. Award Berlin 2007

 
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Orowan Bowing

This simulation illustrates the process of particle by-passing by the so-called Orowan bowing mechanism.

The Orowan stress required to force a dislocation past an obstacle is inversely proportional to the particle separtation, λ, as given by:

τOrowan = αμb / λ

Try changing the particle spacing using the slider bar, and record the Orowan Stress for each spacing.

Plot τOrowan as a function of λ.

Note, The Orowan bowing mechanisms results in the production of dislocation loops around the particles. As subsequent dislocations pass, dense tangles of dislocations form, leading to a high rate of work hardening.

 

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