ENGINEERING MATERIALS AND METALLURGY

In a substitutional solid solution, solute atoms:

• Enter interstitial spaces

• Replace solvent atoms

• Form a separate phase

• Stay outside the lattice

Steel is a formation of _______ alloy.

• Fe-C

• Fe-Cr

• Fe-N

• Fe-Si

What does a phase diagram represent?

• Temperature vs. pressure

• Composition vs. temperature

• Pressure vs. volume

• Composition vs. pressure

What is the eutectoid composition of the iron-carbon phase diagram?

• 0.8% carbon

• 2.14% carbon

• 4.3% carbon

• 6.67% carbon

Which phase is NOT present in the iron-carbon phase diagram?

• Ferrite

• Austenite

• Martensite

• Cementite

The composition of carbon in the iron-carbon phase diagram is:

• 0.8% carbon

• 1.7% carbon

• 6.67% carbon

• 4.3% carbon

At what % cast iron form in the iron-carbon diagram?

• Below 0.8%

• Between 0.8% and 2.14%

• Between 2.14% and 6.67%

• Above 6.67%

What is the primary purpose of heat treatment?

• To change the color of metal

• To improve mechanical properties

• To reduce weight

• To increase electrical conductivity

What is the process of heating steel to a high temperature and then cooling it rapidly called?

• Annealing

• Normalizing

• Quenching

• Tempering

Abbreviation for TTT Diagram ____________