27)

In the Ni-base superalloys used to make turbine blades, which of the following statements are true? Select one or more: a. There are two types of phases, with essentially identical crystalline arrangement and same strength b. There are two types of phases, with very different crystalline arrangement and different strength c. The underlying atomic structure is a cubic crystalline type d. An atom is present only at each corner of each cube face e. There is an atom at each corner of each cube face and one in the centre of each cube face f. There are two types of phases, with essentially identical crystalline arrangement and different strength