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intro metallurgy ch 7
intro metallurgy ch 7
16
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10/09/2013

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Term
AN ORGANIZED ARRANGEMENT OF ATOMS IN A CRYSTAL
Definition
SPACE LATTICE
Term
A ___ ___ IS THE FUNDAMENTAL ARRANGEMENT IN A SPACE LATTICE
Definition
UNIT CELL
Term
4 common types of unit cells for metals:
Definition
oBody-centered cubic
oFace-centered cubic
oClose-packed hexagonal
oBody-centered tetragonal
Term
Unit cell has 9 atoms
Definition
Body-centered cubic
Term
o Chromium
o Molybdenum
o Tantalum
o Tungsten
o Vanadium
o Niobium
o Ferrite form of iron
Definition
•Metals that have a body-centered cubic formation:
Term
(alpha, α)
Definition
Ferrite iron
Term
Unit cell has 14 atoms
Definition
Face-centered cubic
Term
Austenitic iron (gamma, γ)
Definition
Face-centered cubic
Term
Al, Cu, Au, Ag, Pb, Ni, Pt
Definition
Face-centered cubic
Term
Unit cell has 17 atoms
Definition
Close -packed hexagonal
Term
Cd, Co, Mg, Ti, Be, Zn
Definition
Close -packed hexagonal
Term
Hardest, most brittle
Definition
Body-centered tetragonal
Term
Martensitic iron
Definition
Body-centered tetragonal
Term
Unit cell has 9 atoms
Definition
Body-centered tetragonal
Term
•Iron & steel form ____ patterns
Definition
crystalline
Term
•a gp of unit cells (billions) in which each unit cell is identical
Definition
Space lattice
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