Materials Science Questions

Isothermal Time‐Temperature‐Transformation (TTT) plots provide a means of

The time required for a reaction to begin and end is delayed; the isothermal curves are shifted

Homogeneous nucleation is easier/harder than heterogeneous

Austenite has a higher solid solubility of carbon

Surface Free Energy-Increases/Decreases the total energy

Volume (Bulk) Free Energy Increases/Decreases the total energy

For homogeneous nucleation, there is a nucleation barrier (energy barrier), that

We can use an isomorphous phase diagram to considerthe changes in

Eutectoid steels have to go from an austenite directly to

Due to solid solution strengthening, the mechanicalproperties of the alloys are

There exists a critical cooling rate to produce a totally

_______ is Specific mirror lattice symmetry...essentially a reflection of atom positions across the twin plane

The magnitude and the direction of the displacement are defined by a vector, called the _____

True or False All crystalline solids contain vacancies

______ are "extra" atoms positioned between atomic sites (also a point defect)

increasing ____ causes surface island of atoms to grow

______ dislocation: - extra half-plane of atoms inserted in a crystal structure- Burgers vector (b) to dislocation line• ____ dislocation:- spiral planar ramp resulting from shear deformation- Burgers vector (b) to dislocation line

____ is the result of casting molten material

Solvent = ____ component Solute = ___ concentration

_____ are are line defects, a "slip" between crystal planes results when dislocations move that result in permanent (plastic) deformation