The document discusses severe plastic deformation (SPD), a method for producing ultrafine-grained materials and nanomaterials with significantly enhanced mechanical properties. It reviews several SPD processes, including equal channel angular pressing (ECAP), high pressure torsion (HPT), and accumulative roll bonding (ARB), along with their principles, characteristics, advantages, and limitations. Additionally, the applications of ultrafine-grained materials in various sectors, such as micro-forming technology, are highlighted.

1. PLASTICITY
PROJECT
Severe Plastic Deformation
“processes, applications and Nano-materials”

2. 1. Introduction
_____________________________________
1.1. Definition
• Severe plastic deformation (SPD) is one of the methods of obtaining
very fine crystalline structure in different bulk metals and alloys,
which possess different crystallographic structure
1.2. Usage
• The SPD methods can be used to produce ultrafine-grained
materials (UFG) (i.e., grain size in the range 100 nm–1 μm) and
nanomaterials (NMs) (i.e., grain size in the range 1–100 nm).
• The extreme grain refinement can thus, for example, improve the
strength of the metals by a factor of up to 8.

3. 2. SPD Processes
2.1. ECAP (Equal channel angular pressing) method
2.1.1. Principle of ECAP

4. 2.1.2. Effect of sample rotation between repetitive pressings

5. 2.1.3. Characteristics after ECAP
2.1.3.1. Microstructural characteristics
2.1.3.2. Mechanical characteristics
2.1.4. Advantages

6. 2.2. HPT (High Pressure Torsion) method
2.2.1. Principle of HPT
2.2.2. Characteristics after HPT

7. 2.2.3. Advantages & Limitations
2.2.4. Case Study (Incremental high pressure torsion )
2.2.4.1. Experiment

8. 2.2.4.2. Results

9. 2.3. Repetitive Corrugation and Straightening (RCS) method
2.3.1. Process principle
2.3.2. Characteristics after RCS
2.3.2.1. Mechanical characteristics

10. 2.3.2.2. Microstructural characteristics
2.3.3. Advantages and limitations
2.3.4. Comparison between ( RCS ) and ( HPT )

11. 2.4. Accumulative Roll Bonding (ARB) method
2.4.1. Principle
2.4.2. Characteristics after ARB
2.4.2.1. Microstructural characteristics
2.4.3. Advantages and Limitations

12. 2.5. Asymmetric rolling process
2.5.1. principle

13. 2.5.2. Difference between “Symmetric Rolling” and “Asymmetric Rolling”

14. 3. Multifunctional properties of ultrafine-grained materials.
3.1. ENHANCED MECHANICAL PROPERTIES
3.2. EXCELLENT SUPERPLASTICITY

15. 3.3. WEAR RESISTANCE

16. 4. Innovative application of ultrafine-grained materials
4.1. Potential Application In Micro-Forming Technology

17. 4.2. Commercial Applications of Ultrafine-Grained Materials

18. 5. Advanced
Methods for Severe
Plastic Deformation

20. Team
Members
■ 1. Sara Ibrahim Ahmed Ghoneim
no. 64
■ 2. Mostafa Muhammad Ibrahim
no. 154
■ 3. Mina Makram Fahmi
no. 159
■ 4. Nehal Muhammad Gamal
no. 161
■ 5. Nour EL-Hoda Abdulrahman
no. 162

21. Thank You!