An unidentified material has a yield strength of 75 MPa with…

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.

Assume solidification of Nickel occurs by homogeneous nuclea…

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)

Consider a metal single crystal oriented such that the norma…

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?

Use the TTT diagram below and assume that the initial temper…

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?