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Use the TTT diagram below and assume that the initial temperature is 760 ˚C What is the nature of the microstructure, in terms of 1) microconstituents present and 2) approximate percentages of the microconstituents when the specimen is rapidly cooled to 600°C, held for 50 seconds, rapidly cooled to 350°C, held for 1000 seconds, then quenched to room temperature?

An unidentified material has a yield strength of 230 MPa with an average grain diameter of 1.0×10-2 mm. At a yield strength of 275 MPa, the same material has an average grain diameter of 6×10-3mm. Calculate the average grain diameter (in mm) when the yield strength is 310 MPa.

What is the composition of an iron–carbon alloy for which the fraction of total cementite is 0.10?

Referring to the phase diagram below, what is the eutectic composition

For the Cu-Ni phase diagram below, what fraction of the system is liquid for 55 wt% Ni at 1300C

Use the TTT diagram below and assume that the initial temperature is 760 ˚C What is the nature of the microstructure, in terms of 1) microconstituents present and 2) approximate percentages of the microconstituents when the specimen is rapidly cooled to 575°C, held for 10 seconds, rapidly cooled to 350°C, held for 100 seconds, then quenched to room temperature.

Consider a hypothetical eutectic phase diagram for metals A and B that is similar to that for the lead–tin system (see figure below). Determine the composition of the alloy that consists of the primary beta phase and the eutectic microconstituent (the fraction of the primary beta phase is 0.367).

Rank the following iron-carbon alloys and associated microstructures from the hardest to the softest:I. 0.25 wt% C with coarse pearliteII. 0.80 wt% C with coarse pearliteIII. 0.25 wt% C with spheroiditeIV. 0.80 wt% C with fine pearlite

Materials that have high tensile strengths also tend to be ductile.

Dislocations move with the same degree of ease on all the crystallographic planes of atoms and in all the crystallographic directions.