Kinetics of precipitate strengthening and aging

We know precipitation of a secondary phase can provide a strengthening mechanism. Now we need to think about the rate at which we generate precipitates and how large they will be. If you grow them too large then you actually see that they are less effective. Therefore, we see a sweet spot in aging annealing time.

[@benjaminyellin5095]

Studying for a test my mechanical properties of materials course and I just wanted to let you know that your videos have been a FANTASTIC resource! :)

[@TaylorSparks]

💪🏻💪🏻💪🏻feedback like this is why I do it!

[@benjaminyellin5095]

@@TaylorSparks quick update: I got 90 on the final! :)

[@TaylorSparks]

@@benjaminyellin5095 👊🏻

[@andreas2369]

How do you know a material with certain composition is able to do precipitation hardening? Or is it applicable to every composition in the phase diagram as long as it has solid + theta phase?

[@franco_bsnss7482]

Which kind of bond do we have in precipitates?

[@bspatil7400]

NICE.

[@eduardoschiavon5652]

2:14 Can't we also consider the second-phase atoms at the Grain Boundaries as precipitates?

[@TaylorSparks]

Yes. Precipitates are the emergent phase regardless of what they form in the bulk or along the grain boundaries. However, dislocations are already hindered at grain boundaries and so adding a secondary phase there is less impactful than adding precipitates in the middle of the grain where dislocations can normally move with ease.

[@eduardoschiavon5652]

@@TaylorSparks Thank you!