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Severe plastic deformation technology.
The only book to be entirely devoted to SPD processes/techniques, this book provides an insight into the theory and practice of the severe plastic technology used to refine grain structure and improve properties of metallic materials.
| Clasificación: | Libro Electrónico |
|---|---|
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
[Place of publication not identified] :
Whittles Publishing,
2013.
|
| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- Preface ; The Authors ; 1 Equal channel angular extrusion (ECAE) ; 1.1 Introduction ; 1.2 Materials processing for properties ; 1.2.1 Processing mechanics ; 1.2.2 Structure evolution and deformation mode ; 1.3 SPD processes ; 1.4 Concept and history of ECAE ; 1.4.1 Concept of ECAE ; 1.4.2 History of ECAE ; 1.5 Plastic zone during ECAE ; 1.5.1 Frictionless conditions; 1.5.2 Uniform friction in channels ; 1.5.3 Non-uniform friction in channels ; 1.5.4 Round corner channels ; 1.5.5 Additional effects ; 1.6 Outlet channel ; 1.6.1 Contact friction in outlet channel.
- 1.6.2 Material flow 1.6.3 Movable channel walls ; 1.7 Inlet channel ; 1.7.1 Friction in the inlet channel ; 1.7.2 Stress distribution ; 1.7.3 Movable channel walls ; 1.8 ECAE of batch billets ; 1.8.1 Shapes of billets ; 1.8.2 Multi-pass processing ; 1.8.3 Processing parameters ; 1.8.4 Defects associated with ECAE ; 1.9 Continuous ECAE ; 1.9.1 Friction conditions ; 1.9.2 Plastic zone ; 1.9.3 Analysis of CECAE ; 1.10 Modifications of ECAE ; 1.11 Applications ; References ; Notes ; 2 Incremental ECAP; 2.1 Concept of incremental ECAP (I-ECAP) ; 2.1.1 First idea ; 2.1.2 Process definition.
- 2.1.3 Relation to ECAP 2.1.4 Place of I-ECAP in the metal-forming discipline ; 2.2 I-ECAP of square bars ; 2.2.1 FE simulation ; 2.2.2 Tooling ; 2.2.3 Machine ; 2.2.4 Controls ; 2.2.5 Results ; 2.3 I-ECAP of plates ; 2.4 I-ECAP of sheets ; 2.5 ECAP/I-ECAP with converging billets ; 2.6 I-ECAP of tubes ; 2.7 Incremental angular splitting ; 2.8 Summary ; References ; 3 Tooling for ECAP ; 3.1 General recommendations for process design ; 3.2 Configuration of ECAP channel ; 3.2.1 Inclination angle ; 3.2.2 Cross-section ; 3.2.3 Number of turns along channel ; 3.3 Reduction of friction.
- 3.3.1 Moveable die parts 3.3.2 Common face pressing ; 3.3.3 Lubrication ; 3.4 Die design ; 3.4.1 Bolted dies ; 3.4.2 Split dies ; 3.4.3 Prestressed dies; 3.5 Punch design ; 3.6 Tool materials for die and punch ; 3.7 Working conditions ; 3.8 Monitoring of ECAP ; References ; Note ; 4 High pressure torsion (HPT) ; 4.1 Introduction ; 4.1.1 Unlimited strain ; 4.1.2 Efficiency of the technique ; 4.1.3 Simplicity of the process ; 4.1.4 Reliability of the technique ; 4.1.5 Flexibility of testing parameters ; 4.1.6 Versatility of high pressure torsion ; 4.1.7 Sufficient sample dimensions.
- 4.2 Some characteristics of HPT microstructures 4.3 Principles of HPT: description of different setups ; 4.3.1 The idealised HPT version ; 4.3.2 Fully constrained HPT ; 4.3.3 Quasi-constrained HPT ; 4.4 Design criteria for building an HPT device ; 4.4.1 The test rig ; 4.4.2 Applied pressure ; 4.4.3 Applied torque ; 4.4.4 Anvil design and material selection ; 4.4.5 Tool failures ; 4.4.6 Attachments for HPT experiments ; 4.4.7 Upscaling of HPT ; 4.5 Outlook ; References ; 5 Cyclic extrusion-compression (CEC) ; 5.1 Initial CEC device for unlimited deformation.