1. Interactive MENG 426 Lab Tutorials Reading A Material History
The American University in Cairo Mechanical Engineering Department MENG 426: Metals, Alloys & Composites
Interactive MENG 426 Lab Tutorials
Concluding Project
Reading A Material History
Prepared by
Eng. Moataz M. Attallah
Fall 2002

2. Concluding Project This is a concluding project because:
It utilizes the knowledge gained in the entire course and lab work in a comprehensive manner.
It highlights the relation between the lab session, class, and previous knowledge.

3. Introduction (1)
One of the main tasks of a materials engineer is to read a specific material history. Material history readers exist in several fields (e.g. fracture analysis/reverse engineering). Material history traces the birth of the alloy of specific composition in a furnace as a wrought alloy, passing by all the manufacturing process it has gone through, welding, heat treatment process, and further surface finishing, strengthening processes, and possibly ending with pages about its service life.

4. Introduction (2)
In contrast to human history, material history is not recorded on books; it is recorded on the material microstructure and its mechanical properties. Yet, reading human history out of a history book is much easier than reading the material history out of its microstructure!

5. Structure Property Relationship
Processing History
Primary & secondary manufacturing processes, heat treatment, etc…
Microstructure
Properties
Structure-Property Relationship

6. Foundations Material History Manufacturing Heat Treatment
Alloy Composition

7. I-Alloy Composition Knowledge Required:
Phase diagrams (exp # 3,4,5,6,7)
Invariant reactions (exp #3,4)
Iron-Iron Carbide System (exp #4,5,6)

8. Alloy Composition

9. Alloy Composition

10. Eutectic Morphologies
Eutectic Morphologies* * Morphology means the form, shape or outward microstructure of a phase
rodlike
lamellar
globular
acicular
W. F. Smith

11. Alloy Composition (Fe-Fe3C)

12. Alloy Composition (Fe-Fe3C)

13. II-Manufacturing Processes
Cast microstructure (exp #2)
Bulk forming microstructure (project 1)

14. Cast Microstructure

15. Cast Microstructure

16. Rolled/Forged Microstructure

17. Forged Vs. Machined

18. III-Heat Treatment Heat treatment of low carbon steels (exp #5)
Precipitation strengthening of non-ferrous alloys (exp#7)

19. Heat Treatment

20. Heat Treatment

21. Heat Treatment

22. Reading Tools Mechanical Testing Chemical Testing Hardness Testing
Impact Testing
Tension Testing
Compression Testing
Chemical Testing
Spectroscopy

23. Project Details
Refer to the sheet