3) Following is incorrect about a phase diagram. A. It gives information on tran

Question

3) Following is incorrect about a phase diagram. A. It gives information on transformation rates. B. Relative amount of different phases can be found under given equilibrium conditions. C. It indicates the temperature at which different phases start to melt. D. Solid solubility limits are depicted by it. 4) The boundary line between (alpha) and (alpha+beta) regions on a phase diagram is part of A. Solidus B. Liquidus C. Tie-line D. None of the above 5) Which of the following is not true about intermetallic compounds? A. Intermetallic compounds are different from solid solutions. B. Intermetallic compounds have distinct chemical formulas. C. Intermetallic compound is represented as a vertical line on a two-component phase diagram. D. Intermetallic compound is represented as a phase region with finite width on a two- component phase diagram 6) A hypereutectoid steel typically has a microstructure consisting of A. 100% ferrite B. 100% pearlite C. Pearlite and proeutectoid ferrite D. Pearlite and proeutectoid cementite

Explanation / Answer

3) A) This is incorrect as it does not give information about the transformation rate.

4) D) None of the above. It is part of solvus line.

5) D) It is not true

Intermetallic compound forms by stoichiometric mixing of two metals at a definite temperature. Hence, it is not observed by mixing range of stoichiometries.

6) d) Pearlite and proeutectoid cementite.

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