General Metallurgy

Question 1

Group of organized atoms, form a cube with eight corners, and a single atom in the center. Iron, carbon, steel, chromium, and tungsten are some of the metals that are made up of these. 

Answer 1

BCC unit cells

Question 2

Group of units cells form a cube with eight corners. A single atom is centered on each of the six faces. Examples are aluminum, copper, nickel, and non-magnetic metals. 

Answer 2

FCC unit cells

Question 3

A group of unit cells form a hexagonal prism with atoms at each corner, and in the center. Examples are titanium, zinc, and magnesium. 

Answer 3

HCP unit cells

Question 4

Contains at least 12% chromium, and is popular for its ability to resist corrosion. Five main classes: Ferritic, martensitic, austenitic, precipitation, hardening, duplex grade

Answer 4

Stainless steel

Question 5

When stainless steel is heated to about 800 to 1600°F, the chromium and carbon in the metals tend to combine and form chromium carbides. This reduces the chromium content required for the steel and results in less corrosion resistance. 

Answer 5

Sensitization (carbide precipitation)