From Figure, compute the length of time required for the a) From Figure, compute the length of time required for the average grain diameter to increase from 0.01 to 0.1 mm at 500oC for this brass material. (b) Repeat the calculation at 600째C.
(a) For the solidification of iron, calculate the critical (a) For the solidification of iron, calculate the critical radius r* and the activation free energy ?G* if nucleation is homogeneous. Values for the latent heat of fusion and surface free energy are â1.85 A? 109 J/m3 and 0.204 J/m2, respectively. Use the supercooling value found […]
The long, straight conductor shown in Fig. 5-40 (P5.15) lies The long, straight conductor shown in Fig. 5-40 (P5.15) lies in the plane of the rectangular loop at a distance d = 0.1 m. The loop has dimensions a = 0.2 m and b =0.5 m, and the currents are I1 = 20 A and […]
For a fiber-reinforced composite, the efficiency of (a) For a fiber-reinforced composite, the efficiency of reinforcement ? is dependent on fiber length l according to where x represents the length of the fiber at each end that does not contribute to the load transfer. Make a plot of ? versus l to l = 40 […]
(a) Explain why residual thermal stresses are introduced into (a) Explain why residual thermal stresses are introduced into a glass piece when it is cooled. (b) Are thermal stresses introduced upon heating? Why or why not?
(a) Estimate the activation energy for creep (i.e., Qc in (a) Estimate the activation energy for creep (i.e., Qc in Equation 8.20) for the S-590 alloy having the steady-state creep behavior shown in figure. Use data taken at a stress level of 300MPa (43,500psi) and temperatures of 650째C and 730째C. Assume that the stress exponent […]
(a) Equations 6.4a and 6.4b are expressions for (a) Equations 6.4a and 6.4b are expressions for normal (s’) and shear (t’) stresses, respectively, as a function of the applied tensile stress (s) and the inclination angle of the plane on which these stresses are taken (? of Figure 6.4). Make a plot on which is […]
The loop shown in Fig. 6-22 (P6.10) moves away from a wire carry The loop shown in Fig. 6-22 (P6.10) moves away from a wire carrying a current I1 = 10 (A) at a constant velocity u = y7.5 (m/s). If R = 10 ??and the direction of I2 is as defined in the figure, […]
The loop shown in Fig. 5-36 (P5.9) consists of radial lines and The loop shown in Fig. 5-36 (P5.9) consists of radial lines and segments of circles whose centers are at point P. Determine the magnetic field H at P in terms of a, b, ?, and I.
(a) Why is it so important to control the rate (a) Why is it so important to control the rate of drying of a ceramic body that has been hydro plastically formed or slip cast? (b) Cite three factors that influence the rate of drying, and explain how each affects the rate.