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MEGR 3161 – Engineering Materials – Lecture Notes

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15 pages
2025/2026 Written for academic year
Institution University Of North Carolina - Charlotte
Course MEGR 3161 (MEGR3161)
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These MEGR 3161 – Engineering Materials Lecture Notes provide a complete, semester‑long reference for the 2025–2026 study year at UNC Charlotte. The document covers every major topic taught in the course, including crystallographic directions, Miller indices, crystal structures (FCC, BCC, HCP), atomic packing factor (APF), theoretical density, X‑ray diffraction (XRD), crystal defects, dislocations, grain boundaries, microscopy methods, stress–strain behavior, mechanical properties, true stress/strain, and safety factor calculations. Each section is clearly structured and supported by detailed diagrams and fully worked examples that mirror the style of real MEGR exam problems. These notes are ideal for lecture reinforcement, homework support, and exam preparation, giving students a reliable and comprehensive resource for mastering Engineering Materials.

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MEGR 3161

Engineering Materials –
Lecture Notes
Crystal Structures • Defects • XRD • Mechanical
Properties • Stress–Strain
• APF & Density

( 2025–2026 Study Year )

, Table of Contents
MEGR 3161 Engineering Materials – Lecture Notes
(2025–2026 Study Year)
__________________________________________________________

[ 1 ] Crystallographic Directions

● Steps for determining directions
● Projection into x, y, z
● Integer reduction
● Families of directions
● Worked examples: [T0], [0T1], [1T1]
● Crystallographic directions

[ 2 ] Crystallographic Planes (Miller Indices)

● Intercepts and reciprocals
● Reduction to smallest integers
● Negative index notation
● Families of planes
● Worked examples: (111), (230), (0T2)
● Miller indices

[ 3 ] Crystal Structures

● SC, BCC, FCC, HCP
● Coordination numbers
● Atomic packing factor (APF)
● Close‐packed directions
● Stacking sequences
● Summary table of structures
● Crystal structures

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Uploaded on
August 6, 2026
Number of pages
15
Written in
2025/2026
Type
Class notes
Professor(s)
Dr. ahmed el‑ghannam
Contains
Megr 3161 - engineering materials
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