The document contains information about Devaprakasam D, a professor of mechanical engineering, and his course MEE1005 Materials Engineering and Technology. It discusses the purposes of engineering, education, and research, which are minimizing energy and material consumption while maintaining efficiency, and maximizing energy conversion. It also outlines the structure of materials, including unit cells, crystal structures, defects, and polymorphism. Density computations are summarized, relating the density of a crystalline material to the number of atoms in the unit cell, atomic mass, and unit cell volume.

1. DEVAPRAKASAM DEIVASAGAYAM
Professor of Mechanical Engineering
Room:11, LW, 2nd Floor
School of Mechanical and Building Sciences
Email: devaprakasam.d@vit.ac.in, dr.devaprakasam@gmail.com
MEE1005: Materials Engineering and Technology (2:0:0:2)
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

2. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
MEE1005 MATERIALS ENGINEERING AND
TECHNOLOGY

3. Purpose of Engineering /Education/Research
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
There are two important purposes and driving force
behind the Engineering/Education/Research:
1. Minimum consumption of Energy and Materials
without sacrificing the efficiency and functionality.
2. Maximum conversion of Energy from one form to the
other, to identify or design highly efficient process or
system.

4. Purpose of Engineering /Education/Research
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Structure of Materials
Introduction to engineering materials – significance of structure property
correlations in all classes of engineering materials, Unit Cells, Metallic Crystal
Structures, Density Computations, Crystal Systems, Crystallographic Points,
Crystallographic Directions, Crystallographic Planes, Linear and Planar Densities,
Close-Packed Crystal Structures, Crystalline and Non-crystalline Materials, Single
Crystals, Polycrystalline Materials, Imperfection in solids – Point, Line, Surface
and Volume defects - Polymorphism and Allotropy

5. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

6. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

7. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

8. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

9. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

10. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

11. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

12. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

13. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

14. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

15. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

16. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

17. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

18. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

19. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

20. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

21. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

22. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

23. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

24. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
 = mass/volume
= (atoms in the unit cell, n ) x
(mass of an atom, M) /
(the volume of the cell, Vc)
Density Computations
Atoms in the unit cell, n = 4 (FCC)
Mass of an atom, M = A/NA
A = Atomic weight (amu or g/mol)
Avogadro number NA = 6.023  1023 atoms/mol
The volume of the cell, Vc = a3 (FCC)
a = 2R2 (FCC)
R = atomic radius
Ac NV
nA


25. Structure Property Correlations
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Density of a crystalline material,
 = density of the unit cell
= (atoms in the unit cell, n )  (mass of an atom, M) / (the volume of
the cell, Vc)
Density Computations Summarized
Atoms in unit cell, n = 2 (BCC); 4 (FCC); 6 (HCP)
Mass of atom, M = Atomic weight, A, in amu (or g/mol). Translate
mass from amu to grams divide atomic weight in amu by Avogadro
number
NA = 6.023  1023 atoms/mol
Volume of the cell, Vc = a3 (FCC and BCC)
a = 2R2 (FCC); a = 4R/3 (BCC)
where R is the atomic radius AcNV
nA
