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Exam (elaborations)

MTL200 MIDTERM QUESTIONS AND ANSWERS

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  • MTL200
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  • MTL200

MTL200 MIDTERM QUESTIONS AND ANSWERS

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  • September 23, 2024
  • 79
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • MTL200
  • MTL200
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91 Multiple choice questions

Definition 1 of 91
symbol = l; tells which sublevel the electron is on and determines the shape of the orbital;
sublevels are repetitively numbered and also lettered

Magnetic Quantum Number


Quantum Spin Number

Secondary Quantum Number

Secondary Principle Number

Definition 2 of 91
A crystalline solid for which the periodic and repeated atomic pattern extends throughout its
entirety without interruption.

isotropy


single crystal

allotropy

grain size

Definition 3 of 91
A linear crystalline defect associated with the lattice distortion produced in the vicinity of the
end of an extra half-plane of atoms within a crystal. The Burgers vector is perpendicular to the
dislocation line.

unit cell


solid solution

twin boundaries


edge dislocation

,Definition 4 of 91
The energy required to separate two atoms that are chemically bonded to each other to an
infinite distance

Valence Electrons

Thermal Energy


Bonding Energy

Kinetic Energy

Definition 5 of 91
A vector that denotes the magnitude and direction of lattice distortion associated with a
dislocation.

Grain size


Quantum numbers

Burgers vector

Edge dislocation

Definition 6 of 91
A measure of the size of the grains in a crystalline material obtained by counting the number of
grains per square inch at a magnification of 100




ASTM grain size number


Grain size

Atomic number

Diffusion flux

,Definition 7 of 91
4 atoms in Unit Cell
12 Coordination Number
APF is 0.74 or 74%

What are the Four Levels of Material Structures?

Factors Affecting the Solubility of Substitutional Solid Solutions

FCC Number of Atoms, Coordination Number and APF


Two Types of Solid Solution

Definition 8 of 91
liquid transforms to two solid phases

Solvus

Eutectic

Polycrystalline


Equilibrium

Definition 9 of 91
separates liquid and semi-solid/semi-liquid phase regions

Eutectic

Liquidus

Solidus

Solvus

, Definition 10 of 91
a basic structural unit of a crystal structure, defined in terms of geometry and atom positions
within a parallelepiped volume.

System

Unit Cell

Vacancy

Atomic Number

Definition 11 of 91
Surface Atoms aren't bonded to the maximum number of atoms and thus can be broken off
easier.

External Surface - Interfacial Defect

Covalent Bonding and Directionality

Metallic Bonding and Directionality

Covalent bonding and directionality

Definition 12 of 91
for a system at equilibrium, an equation that expresses the relationship between the number of
phases present and the number of externally controllable variables




Lever Law


Phase

Gibbs Phase Rule

The Lever Rule

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