Superplasticity of Alloys, Intermetallides and Ceramics

ISBN-13: 9783642846755 / Angielski / Miękka / 2011 / 317 str.

Oscar A. Kaibyshev

Opis

Superplasticity is shown to be a universal phenomenon in materials ranging from metals and intermetallics to ceramics. Superplastic deformation facilitates the production of materials with specifically chosen properties. This is illustrated using the examples of Mg-, Al-, and Ti-based commercial alloys, steels, and superalloys. Some of the strenghts of this book are: the broad range of materials studied, the reduction of scientific results to a form suitable for the practitioner, a profound physical analysis of the phenomenon, a new approach to superplastic treatment as a kind of strain-heat treatment, the presentation of new data on superplastic flow and on production techniques of micro- and submicrocrystalline structures.

Spis treści

1. Structural Superplasticity.- 1.1 Phenomenology and Influence of the Initial Microstructure.- 1.2 Structure Evolution and Fracture Modes.- 2. The Nature of Superplastic Flow.- 2.1 Experimental Investigations of Superplastic Deformation.- 2.1.1 Grain Boundary Sliding.- 2.1.2 Intragranular Deformation.- 2.1.3 Diffusion Creep.- 2.1.4 The Interrelationship and the Role of Different Deformation Mechanisms in Superplastic Flow.- 2.2 Micromechanisms and the Theory of Superplastic Deformation.- 2.2.1 Physical Models.- 2.2.2 Grain Boundaries in the Deformation Processes.- 2.2.3 A New Model of Structural Superplasticity.- 3. Microcrystalline Materials and Microstructure Refining.- 3.1 Structure and Properties of Microcrystalline Materials.- 3.2 Metallurgical Methods of Refinement.- 3.3 Heat Treatment.- 4. Superplastic Deformation of Magnesium Alloys.- 4.1 Effect of Chemical Compositon, Structure, and Temperature-Rate Conditions of Deformation on Ductility.- 4.2 Refining of the Magnesium Alloy Structure.- 4.3 Effect of Superplastic Deformation on the Properties of the Alloys.- 5. Superplasticity of Commercial Aluminium Alloys.- 5.1 Effect of Structure, Conditions of Deformation, and Chemical Composition on the Superplasticity of Aluminium Alloys.- 5.1.1 Effect of Structure and Conditions of Deformation. Strain Rate.- 5.1.2 Effect of Chemical Composition.- 5.2 Processing Methods for Obtaining Microcrystalline Structure in Commercial Aluminium Alloys.- 5.3 Effect of Superplastic Deformation on the Structure and Properties of Aluminium Alloys.- 5.4 Effect of Grain Size on the Structural Strength of Aluminium Alloys.- 6. Superplasticity of Titanium Alloys.- 6.1 Plasticity and Superplasticity of the Titanium Alloys in the Single-Phase Region.- 6.2 Superplasticity of Titanium Alloys in the Two-Phase Region.- 6.3 Methods of Obtaining Microcrystalline Structure in Titanium Alloys.- 6.4 The Effect of Superplastic Deformation on the Mechanical Properties of the Titanium Alloys.- 7. Structural Superplasticity of Steels.- 7.1 Superplasticity of Iron, Plain Carbon, and Alloyed Steels.- 7.2 Preparation of Fine-Grained Microstructure in Steels.- 7.3 Effect of Superplastic Deformation on Mechanical Properties.- 8. Superplasticity of Nickel-based Superalloys.- 8.1 Effect of Structure, Deformation Temperature and Strain Rate on the Ductility of Alloys.- 8.2 Methods for Converting Alloys into a Superplastic State.- 8.3 High-Temperature Properties of Alloys After Processing in the Superplastic Condition.- 9. Superplasticity of Intermetallic Compounds.- 9.1 Superplasticity of Alloys with Both Intermetallic and Metallic Phases.- 9.2 Superplasticity of Intermetallic Compounds.- 9.3 Refining of Microstructure in Intermetallics.- 9.4 Effect of Superplastic Treatment on the Physico-mechanical Properties of Intermetallics.- 9.4.1 Mechanical Properties Under Ductile-Brittle Transition.- 9.4.2 Mechanical Properties at Room Temperature.- 9.4.3 Magnetic Properties.- 10. Superplasticity of Ceramics.- 10.1 Influence of Structure and Strain Conditions on the Superplasticity of Ceramics.- 10.2 Mechanisms of Superplastic Deformation of Ceramics.- 10.3 Methods for Creating Microcrystalline Structures in Ceramics.- 10.4 Influence of Superplastic Deformation on the Properties of Ceramics.- References.- Author Index.