From where does the activation energy for diffusion come?

A) the kinetic energy of moving down a concentration gradient

B) the energy gained by forming a solid solution

C) the energy stored as thermal vibrations

D) the energy gained by forming carbide precipitates

From what type of carbide are carbide tools made?

A. Scheelite

B. Tungsten

C. Chromium

D. Nickel

Pearlite consists of:

A) FE + CM

B) FE + AUS + CM

C) FE + AUS

D) One phase

The transformation from AUS -> MAR is:

A) Time dependent, temperature dependent

B) Time dependent, temperature independent

C) Time independent, temperature independent

D) Time independent, temperature dependent

Which of the following best describes the position of the impact test hammer after the test on fresh martensite?

A) Charpy bars aren't used for toughness tests.

B) The hammer will swing up to approximately the same height as that

C) The hammer will swing to a position significantly lower than the height from which it started

D) The hammer will swing to a position significantly lower than the height from which it started

Which will NOT shift the TTT curves to the right?

A) Rapid quenching

B) Add carbon

C) Add alloy elements

D) Increase AUS grain size

Which of the following love(s) carbon the most?

A) Dr. Ryba

B) Students of MATSE 259

C) Iron

D) Tungsten and Chromium