Calculate the critical radius of precipitates for which an Al--Mg alloy containing 10% Mg will be strengthened by Orowan looping instead of particle shear. Use the following data: γAl2Mg = 1.4 J/m2, G Al = 26.1GPa, rAl = 0.143 nm.

To increase the hardness of a steel gear, it was carburized at 850oC by introducing 1.3%C at its  steel surface. What will be the final carbon content 1.4 mm beneath the surface if this treatment  was lasted for 26 hours. The initial carbon content of steel is 0.1%C. (gas constant is 8.31 j/mol.K)

cover the manufacturing and loading of an NiCu bar. The bar has a 0.01 m x 0.01m cross-section and is 1m long. The alloy is 60% (at%) Ni and 40% (at%) Cu.

12-70 A steel is heated until 40% austenite, with a carbon content of 0.5%, forms. Estimate the temperature and the overall carbon content of the steel.