Iron-carbon (Steel) Phase Diagram w/ Pro-Eutectoid Step

A Materials Science problem that calculates the proeutectoid ferrite,,eutectoid ferrite, and cementite weight fractions and masses of a 0.3% C steel as it cools from austenite. Includes detailed explanation and two different examples of the lever rule. It also explains the concepts of eutectic and euctectoid.
Similar to problems from "Phase Diagram" chapters of Callister.

[@TotalVikingPower]

This is one of the topics Khan haven't made yet. The definitions you give is really great. Speak slow and precise. Thanks.

[@DavidTube5]

This makes things a bit clearer than they were in class.

[@Dmiudo]

Very clear and straight to the point explanations. Helped out a lot 👌

[@EngineeringandDesignSolutions]

You are very welcome! I'd like to do some stuff for Khan, especially for engineering, as they have stopped short of these topics.

[@mauricaoo]

Very good explanation. Thanks.

[@jorgerevueltamoreno1902]

very well explained thank you very much!!!!!!

[@niteshk9060]

It was helpful. Thanks

[@0568588527]

Thank you so so much that helped out alot

[@zakariyajabri]

thanx man.. u made my lide easier

[@TehMaxLightning]

When you calculate pro-eutectoid ferrite, your tie line went passed the boundary (solidus). If instead your tie line stopped at the boundary, what would that indicate instead? Or does it not have any meaning?

[@chomp9513]

thanks it helped me a lot

[@ahmedmoha1110]

U saved me a lot of time You are awesome

[@EngineeringandDesignSolutions]

You're very welcome. Thanks for watching and commenting!

[@a.g4521]

so helpful thanks

[@shameseldeen94]

thanks very very much

[@preetammukherjee623]

is this figure taken from W.D.callister??? :) but you have taught very well.. :)

[@Sanjeevkumar-gb9rn]

Thank you Sir..

[@zachoberholzer9839]

THANKS!!!!!!!!!!!!!!!!

[@Dosalt]

thanks a lot

[@vic4955]

GOOD JOB

[@blackheart6897]

Can't thank you enough

[@Mannycheungrulez]

for my question, it says consider 1.0 kg of austenite, is there a difference in the steps?

[@blackheart6897]

Not at all

[@samuelbrightamankwahboadi1718]

It really helped.

[@EngineeringandDesignSolutions]

+Samuel Bright Amankwah Boadi You are most welcome!

[@ZeoGarcia]

ty sir

[@1234SLUR]

better than that spoon me video :#

[@wraster07hp36]

Thanks

[@LeneHovlandFosse]

never mind, but what does this say : Wα∙T=Wγ∙U ???

[@EngineeringandDesignSolutions]

+Lene Fosse Where do you see it? It looks like a statement of the lever rule.

[@LeneHovlandFosse]

Where did 0.76 come from?

[@katherinehiggins2861]

percentage carbon at the eutectoid point

[@EngineeringandDesignSolutions]

+Lene Fosse Thanks, Katherine. 0.76% is the point at which carbon is eutectoid in iron in this composition. It is shown clearly on the diagram, but maybe I should have stated it explicitly.

[@nicholasvolkenant8386]

In part (a) you refer to it as the pro-eutectoid Ferrite. Is the Austenite you solve for technically pro-eutectoid Austenite in part (a) as well? Or is it not because the beginning microstructure is pure Austenite?

[@EngineeringandDesignSolutions]

+Nicholas Volkenant "Pro-Eutectoid Ferrite" is in contrast to the "Eutectoid Ferrite". PEF is Ferrite made before the eutectoid point, whereas EF is made at the eutectoid point. Austenite is not developed at either point and is actually transformed into other constituents as the temperature drops. Thus, there is no "pro-eutectoid Austenite", nor is there "eutectoid Austenite" because Austenite is not produced in these locations (assuming a drop in temperature). I hope that helps.

[@nicholasvolkenant8386]

+Engineering and Design Solutions Perfect, that is what I had expected. That helps, thank you for the clarification.

[@EngineeringandDesignSolutions]

+Nicholas Volkenant You are very welcome!

[@TotalVikingPower]

* you Speak slow and precise.

[@bb-lj2ti]

thanks but i bet you have a hard time to write all of that, recommend to buy an ipad