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MEGR 3161
Engineering Materials –
Final Exam Review
Notes
Crystal Structures • Miller Indices • Diffusion •
Vacancies • Fracture Mechanics
• Elasticity
( 2025–2026 Study Year )
, Table of Contents
MEGR 3161 Engineering Materials – Final Exam Review Notes
(2025–2026 Study Year)
__________________________________________________________
[ 1 ] Exam 1–3 Combined Review
● Electron configurations
● Valence electron configurations
● Ion electron configurations
● Ionic character formula & worked examples
● Electron configuration
[ 2 ] Crystal Structures & Miller Indices
● Direction indices (worked examples)
● Plane indices (Miller indices)
● Sketching directions and planes
● FCC, BCC, HCP relationships
● Miller indices
[ 3 ] Theoretical Density Calculations
● FCC, BCC density formulas
● Unit cell volume
● Avogadro’s number usage
● Full worked density example
● Density
[ 4 ] Diffusion & Vacancies (Chapter 4)
● Vacancy concentration formula
● Activation energy for vacancy formation
● Diffusion coefficient (D) calculation
● Carburizing time using error function (erf)
● Interpolation steps
● Diffusion