Blog

A Mg-Pb alloy of composition 81 wt% Pb and 19 wt% Mg is slowly cooled from 700°C. At what temperature does the first solid form and what is the composition of the solid?

What is the maximum solubility of Pb in Sn?

An unidentified material has a yield strength of 75 MPa with an average grain diameter of 6.25×10-2 mm. At a yield strength of 175 MPa, the same material has an average grain diameter of 6.94×10-3mm. Calculate the yield strength when the average grain diameter is 1.0×10-3 mm.

Which phase(s) are present, and how much of each is/are present at point G?

Assume solidification of Nickel occurs by homogeneous nucleation. What is the critical radius that exist at the degree of supercooling = 200°C? The latent heat of fusion and surface free energy are -2.53 x 109 J/m3 and 0.255 J/m2, respectively. (Tm = 1455 °C)

This single phase of the iron-carbon phase diagram can have up to 2.14 wt% carbon

Of all of these phases, which phase contains the most carbon

Consider a metal single crystal oriented such that the normal to the slip plane and the slip direction are at angles of 60° and 35°, respectively, with the tensile axis. If the critical resolved shear stress is 6.2 MPa, will an applied stress of 20 MPa cause the single crystal to yield? If not, what stress will be necessary?

What is the composition of an iron–carbon alloy for which the fraction of total ferrite is 0.86?

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?