Sign Up Sign Up

Connect with:
Google
or use


Have an account? Sign In Now

Sign In Sign In

Connect with:
Google
or use


Forgot Password?

Don't have account, Sign Up Here

Forgot Password Forgot Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.


Have an account? Sign In Now

Sorry, you do not have permission to ask a question, You must login to ask a question.

Connect with:
Google
or use


Forgot Password?

Need An Account, Sign Up Here

Please briefly explain why you feel this question should be reported.

Please briefly explain why you feel this answer should be reported.

Please briefly explain why you feel this user should be reported.

Sign InSign Up

Askmemetallurgy

Askmemetallurgy Logo Askmemetallurgy Logo

Askmemetallurgy Navigation

  • MCQs
    • Metallurgical Engineering mcq
    • Topic Wise mcq
    • Numericals
  • GATE Papers
  • Notes
Search
Ask A Question

Mobile menu

Close
Ask a Question
  • Home
  • Categories
  • GATE Papers
  • Recent Posts
  • Badges
  • MCQs
    • Metallurgical Engineering mcq
    • Topic Wise mcq
    • Numericals
  • GATE Papers
  • Notes
Home/Questions/Q 638
Next
Answered
metagate.in
metagate.inPlatinum
Asked: April 14, 20202020-04-14T07:57:13+05:30 2020-04-14T07:57:13+05:30In: Physical Metallurgy & Heat treatment

BARC-1: In a Eutectic Phase Diagram, Lever Rule can be applied just above Eutectic Temp or Just below. But not at the Eutectic Temp. What is the Reason?

BARC-1: In a Eutectic Phase Diagram, Lever Rule can be applied just above Eutectic Temp or Just below. But not at the Eutectic Temp. What is the Reason?
BARC
  • 1
  • 99
  • 1,728
  • 0
  • 5
Share
  • Facebook

    You must login to add an answer.

    Connect with:
    Google
    or use


    Forgot Password?

    Need An Account, Sign Up Here

    9 Answers

    • Voted
    • Oldest
    • Recent
    1. Best Answer
      metagate.in Platinum GATE Metallurgy Coaching | Faculty with 7 years of Teaching Experience | 50% of Selections in all PSUs
      2020-04-14T09:56:21+05:30Added an answer on April 14, 2020 at 9:56 am
      This answer was edited.

      The answer is quite simple!! If you remember the derivation of Level Rule, it is derived for a Two-Phase Equilibrium. At the Eutectic Point, there is a three-phase Equilibrium and hence it cannot be applied !! :) :) We will post the Questions at the start of the Day and answers at the End of the DayRead more

      The answer is quite simple!!

      If you remember the derivation of Level Rule, it is derived for a Two-Phase Equilibrium. At the Eutectic Point, there is a three-phase Equilibrium and hence it cannot be applied !! šŸ™‚ šŸ™‚

      We will post the Questions at the start of the Day and answers at the End of the Day !! Good Luck to all

      See less
      • 9
      • Share
        Share
        • Share on WhatsApp
        • Share on Facebook
        • Share on LinkedIn
        • Share on Twitter
    2. Raghavendra Nomula Copper Undergrad. in Metallurgical and Materials Engineering from Malaviya National Institute of Technology, Jaipur
      2020-04-14T08:19:59+05:30Added an answer on April 14, 2020 at 8:19 am
      This answer was edited.

      Because lever rule is used to find the composition of two phases that are in equilibrium. But at the eutectic point, the phases present are in dynamic equilibrium. To apply a mass balance equation there were require one more parameter i.e rate of heat. Without knowing how much heat is taken out or hRead more

      Because lever rule is used to find the composition of two phases that are in equilibrium. But at the eutectic point, the phases present are in dynamic equilibrium. To apply a mass balance equation there were require one more parameter i.e rate of heat. Without knowing how much heat is taken out or how much heat is given to the system we can’t apply any mass balance equation. So we’re not able to apply lever rule at the eutectic point.

      Whereas we can apply above and below eutectic temperature because equilibrium present there is not dynamic.

      See less
      • 4
      • Share
        Share
        • Share on WhatsApp
        • Share on Facebook
        • Share on LinkedIn
        • Share on Twitter
      • 1 Reply
      • Sujitmeta123 Iron
        2020-04-14T20:42:26+05:30Replied to answer on April 14, 2020 at 8:42 pm

        Where you know about dynamic equilibrium.

        Where you know about dynamic equilibrium.

        See less
        • 0
        • Share
          Share
          • Share on WhatsApp
          • Share on Facebook
          • Share on LinkedIn
          • Share on Twitter
    3. karrinaveen
      2020-04-14T08:10:33+05:30Added an answer on April 14, 2020 at 8:10 am

      Lever rule can be applied on two phase region

      Lever rule can be applied on two phase region

      See less
      • 2
      • Share
        Share
        • Share on WhatsApp
        • Share on Facebook
        • Share on LinkedIn
        • Share on Twitter
      • 1 Reply
      • Malika Mazy Iron
        2020-04-16T02:12:21+05:30Replied to answer on April 16, 2020 at 2:12 am

        šŸ‘

        šŸ‘

        See less
        • 0
        • Share
          Share
          • Share on WhatsApp
          • Share on Facebook
          • Share on LinkedIn
          • Share on Twitter
    4. Vishal Pambhar Gold Metallurgist, Standard Provider (IS, ASTM, BS, ISO etc), Laboratory Equipment Suppliers,
      2020-04-14T08:15:48+05:30Added an answer on April 14, 2020 at 8:15 am
      This answer was edited.

      TheĀ lever ruleĀ is a rule used to determine theĀ mole fractionĀ or theĀ mass fractionĀ  of each phase of aĀ binaryĀ equilibriumĀ phase diagram. It can be used to determine the fraction of liquid and solid phases for a given binary composition and temperature that is between theĀ liquidusĀ andĀ solidusĀ line. ThRead more

      • TheĀ lever ruleĀ is a rule used to determine theĀ mole fractionĀ or theĀ mass fractionĀ  of each phase of aĀ binaryĀ equilibriumĀ phase diagram.
      • It can be used to determine the fraction of liquid and solid phases for a given binary composition and temperature that is between theĀ liquidusĀ andĀ solidusĀ line.

      • There is now more than one two-phase region. The tie line drawn is from the solid alpha to the liquid and by dropping a vertical line down at these points the mass fraction of each phase is directly read off the graph, that is the mass fraction in the x axis element. The same equations can be used to find the mass fraction of alloy in each of the phases, i.e. wlĀ is the mass fraction of the whole sample in the liquid phase
      • Conclusion : Lever Rule can’t applied on Eutectic Point due to three phase, it describes two phase equilibrium.Ā 
      See less
      • 2
      • Share
        Share
        • Share on WhatsApp
        • Share on Facebook
        • Share on LinkedIn
        • Share on Twitter
    5. subbu
      2020-04-14T08:49:02+05:30Added an answer on April 14, 2020 at 8:49 am

      Because , the eutectic point is an invariant point in which the possibility of distinguishing a variable or degrees of freedom is zero

      Because , the eutectic point is an invariant point in which the possibility of distinguishing a variable or degrees of freedom is zero

      See less
      • 0
      • Share
        Share
        • Share on WhatsApp
        • Share on Facebook
        • Share on LinkedIn
        • Share on Twitter
    6. SAI CHARAN Silver Metallurgical Engineering student
      2020-04-14T09:33:59+05:30Added an answer on April 14, 2020 at 9:33 am

      Lever rule is used to find out the weight percentages in an alloy at particular composition of an alloy.

      Lever rule is used to find out the weight percentages in an alloy at particular composition of an alloy.

      See less
      • 0
      • Share
        Share
        • Share on WhatsApp
        • Share on Facebook
        • Share on LinkedIn
        • Share on Twitter
    7. Vijay Copper
      2020-04-14T11:45:32+05:30Added an answer on April 14, 2020 at 11:45 am

      In the thermodynamic view. The interaction parameter (omega) come intoĀ  picture.. 1. At the eutectic line(below or above) the interaction parameter close to zero but not zero. So the phases are miscible.(nither repulsive nor attractive to each other) So this is what causes dynamic equilibrium.. As wRead more

      In the thermodynamic view.

      The interaction parameter (omega) come intoĀ  picture..

      1. At the eutectic line(below or above) the interaction parameter close to zero but not zero.

      So the phases are miscible.(nither repulsive nor attractive to each other)

      So this is what causes dynamic equilibrium..

      As we going far from line this interaction parameter changes..Ā  So we can not calculate.

       

      See less
      • 0
      • Share
        Share
        • Share on WhatsApp
        • Share on Facebook
        • Share on LinkedIn
        • Share on Twitter
      • 1 Reply
      • Sujitmeta123 Iron
        2020-04-14T20:43:39+05:30Replied to answer on April 14, 2020 at 8:43 pm

        I can't understand. Please elaborate more

        I can’t understand. Please elaborate more

        See less
        • 0
        • Share
          Share
          • Share on WhatsApp
          • Share on Facebook
          • Share on LinkedIn
          • Share on Twitter
    8. sujatha Silver
      2021-01-17T10:36:59+05:30Added an answer on January 17, 2021 at 10:36 am

      At eutectic point all three phases coexist with each other.

      At eutectic point all three phases coexist with each other.

      See less
      • 0
      • Share
        Share
        • Share on WhatsApp
        • Share on Facebook
        • Share on LinkedIn
        • Share on Twitter
    9. Arpita Samal Platinum⭐ Metallurgical and Materials Engineering student
      2020-05-19T23:12:21+05:30Added an answer on May 19, 2020 at 11:12 pm

      Because eutectic point is an invariant point where degree of freedom is zero so lever rule is applied above or below eutectic point.

      Because eutectic point is an invariant point where degree of freedom is zero so lever rule is applied above or below eutectic point.

      See less
      • -1
      • Share
        Share
        • Share on WhatsApp
        • Share on Facebook
        • Share on LinkedIn
        • Share on Twitter

    Sidebar

    Related Questions

    • BARC-16: Using Gibb’s Phase rule for a Binary Eutectic alloy, the maximum number of Phases that can co-exist at equilibrium are 4 (F=0, P = C+2 = 4). Then at the Eutetic point there should be 4 phases but we find only 3? Explain
      • On: May 3, 2020
      • Answers: 12

      BARC-16: Using Gibb's Phase rule for a Binary Eutectic alloy, the maximum number of Phases that can co-exist at equilibrium ...

      • On: April 23, 2020
      • Answers: 8

      BARC-15: What is the maximum number of phases that can co-exist in a Binary Phase Diagram?

    • BARC-14: What is the effect of grain size on the TTT Curves of Eutectoid Steel?
      • On: April 23, 2020
      • Answers: 3

      BARC-14: What is the effect of grain size on the TTT Curves of Eutectoid Steel?

      • On: April 23, 2020
      • Answers: 3

      BARC-13: What is the physical significance of Gibbs-Duhem Equation?

      • On: April 21, 2020
      • Answers: 3

      BARC-12: Most alloying elements increase the Hardenability of Steel except Cobalt. Why does Cobalt behave differently?

    Top Users

    Arpita Samal

    Arpita Samal

    • 7 Questions
    • 1,691 Points
    Platinum⭐
    digbijaya igit

    digbijaya igit

    • 11 Questions
    • 1,417 Points
    Platinum⭐
    Rohit.km

    Rohit.km

    • 2 Questions
    • 1,408 Points
    Platinum⭐

    Adv 120×600

    Explore

    • Home
    • Categories
    • GATE Papers
    • Recent Posts
    • Badges

    Footer

    Askmemetallurgy.com

    Askmemetallurgy is the one stop solution for all the need of a Metallurgical Engineers. Askmemetallurgy provides its users with a variety of services to help meta students from semester to his career path. Learn more.

    Legal Stuff

    • Privacy Policy
    • Terms Of Use

    Help & Services

    • FAQ
    • Contact Us

    Copyright © 2021 Askmemetallurgy.com, All rights reserved. Registration on or use of this site constitutes acceptance of our Privacy Policy
    DMCA.com Protection Status