2.3 | MSE104 - Calculating phase fractions (lever rule)

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  • Опубликовано: 30 окт 2024

Комментарии • 54

  • @siddharthrathi2703
    @siddharthrathi2703 9 лет назад +82

    I have an exam in 8 hours, and you explained this to me in 12minutes, what my teacher couldn't in 4 classes of half hours each.
    Thanks a ton.

  • @mountfuji2269
    @mountfuji2269 Год назад

    Loved how simple you made it at 11:20, no idea why lecturers can't explain stuff simply like that.

  • @shashwatchopra6154
    @shashwatchopra6154 6 лет назад +1

    I honor you with greatest Civilian award of my Country. _/\_

  • @katypeace2460
    @katypeace2460 9 лет назад

    Thank you for taking the time to do this informative video. I found it very helpful!

  • @Soodrook
    @Soodrook 9 лет назад +3

    I think you did a really good explanation!! :) Thank you!

  • @aidantompkins2970
    @aidantompkins2970 2 года назад

    I'm here from the Kurzgesagt Discord challenge with the brass phase diagram, thanks! :D

  • @emmagao2923
    @emmagao2923 11 месяцев назад

    Awesome video! Thank you.

  • @aitorgarcia1147
    @aitorgarcia1147 9 лет назад

    You have just saved me an assignment for tomorrow ;)

  • @Yodavid1
    @Yodavid1 3 года назад

    look forward to more of your content, David. you could make a series on metal forming, for instance

  • @OmarAttar
    @OmarAttar 4 года назад

    A LIFE SAVER !!!

  • @mabban1768
    @mabban1768 6 лет назад +1

    Ni mtlb paisa bhi kharch kiya apne toh padaya bhi Badiya ...
    Thank you bhiya

  • @flowerpowerocks3283
    @flowerpowerocks3283 7 лет назад

    What about calculating the phase fractions for eutectic systems. I am guessing the vs + vl will not be 1, and the best way i can describe it is that vs and vl will turn out opposite...

  • @durgeshrallapalli5237
    @durgeshrallapalli5237 7 лет назад

    The explanation was very good , thanks for the help😁

  • @loverofbeats
    @loverofbeats 11 лет назад +1

    another great video! thank you!! keep posting please.

  • @andyfrench8660
    @andyfrench8660 8 лет назад

    Ah, thanks, this video was a big help.

  • @flapperkhut9586
    @flapperkhut9586 10 лет назад

    Thank you very much for this perfect explination!
    I have a question though. When is asked: Give me the (T,t) diagram => Temperature,time using ''De fasenregel van Gibbs" (IDK in English, fase-rule of Gibbs perhaps...). How does the diagramlooks like then? During the 2fase part (melt+solid) I have: (Gibbs) V=1+2-2=1 So the temperature can variate. Is this correct? And during the 1-fase parts I have: V=1+2-1=2 ?? What does that mean? 2 Parameters that can variate... but which ones?
    Thanks

    • @DavidDyeIC
      @DavidDyeIC  10 лет назад

      see en.wikipedia.org/wiki/Phase_rule. Looks like an accurate description to me.

  • @mxolisimntambo3810
    @mxolisimntambo3810 8 лет назад

    I have a question, let say am given mol% then am asked to find the liquidus temperature, solidus temperature and freezing range

    • @Ruruuish
      @Ruruuish 8 лет назад

      convert the %mol to weight % using x(mass fraction)=(yi*Mi/sigma y*M)

  • @marcochamba8780
    @marcochamba8780 4 года назад

    exam in 4 hours, great!!

  • @rameshwarmore9092
    @rameshwarmore9092 5 лет назад

    Great pictorial explanation

  • @achamyelehkassa1824
    @achamyelehkassa1824 5 лет назад

    thank you so much!! it is clear explanation!!

  • @m01417
    @m01417 8 лет назад +1

    thanks v.clear explanation!

  • @ranjithkumarravi3851
    @ranjithkumarravi3851 6 лет назад

    Great explanation but can you help me to derive the same in weight percentage??

    • @DavidDyeIC
      @DavidDyeIC  6 лет назад

      Its the same; you conserve mass rather than atoms. So the derivation is exactly the same.

  • @gaminggods110
    @gaminggods110 8 лет назад

    Very Helpful! Thanks!

  • @somdebsar7378
    @somdebsar7378 2 года назад

    Ig Here atomic vol% is dealt instead of atomic wt%

  • @medadrufus
    @medadrufus 6 лет назад

    Life saver. Thanks

  • @janm.4692
    @janm.4692 11 лет назад

    This could be a very nice explanation. The only problem with it is that it is not true!
    It is true for mass fractions / weight fractions BUT since the densities of solid & liquid are different (in general), the rule can't be applied to volume fractions...

    • @DavidDyeIC
      @DavidDyeIC  10 лет назад

      You are correct, of course. That's why I am flaky as to whether I am calculating a volume, area, weight or mole (atom) fraction of phase - this point is made in the notes. In practice in metallurgy, we measure the area fraction using microscopy, very commonly. And we assume that this corresponds to the volume fraction and to the weight fraction we calculated using the phase diagram (which is usually in wt.%). This is the custom in the subject; don't let it worry you.

    • @cainjm2
      @cainjm2 6 лет назад

      Yes, the formula is obviously rigorously untrue when used for volume fractions, but he seems to suggest in the video that he uses this quite often, leading me to believe that perhaps the error due to the difference in densities is quite small for common materials?

  • @VinodKumar-vk2ce
    @VinodKumar-vk2ce 5 лет назад

    How to calculate mass fraction sir..

  • @IamChandEvil
    @IamChandEvil 8 лет назад

    Why must one use the opposite 'lengths'?

    • @DavidDyeIC
      @DavidDyeIC  8 лет назад +1

      thats just the way the derivation works out.

  • @adiranawat8532
    @adiranawat8532 5 лет назад

    good one

  • @hassanagalit6815
    @hassanagalit6815 9 лет назад

    Thanks !!

  • @062053266willy
    @062053266willy 8 лет назад

    how to find Compositions in liquid and solid

    • @DavidDyeIC
      @DavidDyeIC  8 лет назад

      If you are in a two phase region, read across T to the phase boundaries. In a single phase region, then its the alloy composition.

    • @062053266willy
      @062053266willy 8 лет назад

      do i need to use lever rule to determine the Compositions in liquid and solid

    • @saisrinu7228
      @saisrinu7228 6 лет назад

      Super explanation sir thanks sir

  • @haroonhaider1
    @haroonhaider1 9 лет назад +1

    Greating form POLITO ITALY

  • @MrGeragon
    @MrGeragon 5 лет назад +1

    epiphany in 10:20

  • @marcussanford8422
    @marcussanford8422 9 лет назад

    IF EACH PERSON IS HIS OR HER WORLD...IN MULTIVERSE THEORY...SHOULD THEY BE PRESENT...AS I AM...IN SOMETHING...LETS CALL...LIVE PHASE FRACTIONS

    • @mabban1768
      @mabban1768 6 лет назад

      U can't even understand phase rule and talking about multiverse and all shit😅

  • @gerardogaray9036
    @gerardogaray9036 4 года назад

    Cuidado con el signo.