Consider the following statements in connection with the phase diagrams:1. Phase diagrams of binary alloys change by the presence of other alloying elements.2. Tie-line construction and lever rule are used to determine the phase compositions.3. Time-temperature transformations can be studied with the help of phase diagramsWhich of the above statements are correct?

Consider the following statements in connection with the phase diagram

1.	Consider the following statements in connection with the phase diagrams:1. Phase diagrams of binary alloys change by the presence of other alloying elements.2. Tie-line construction and lever rule are used to determine the phase compositions.3. Time-temperature transformations can be studied with the help of phase diagramsWhich of the above statements are correct?
A.	1 and 2 only
B.	1 and 3 only
C.	2 and 3 only
D.	1, 2 and 3
Answer» B. 1 and 3 only

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