Bulk nanostructured materials from severe plastic deformation

A balanced mechanics-materials approach and coverage of the latest developments in biomaterials and electronic materials, the new edition of this popular text is the most thorough and modern book available for upper-level undergraduate courses on the mechanical behavior of materials To ensure that the student gains a thorough understanding the authors present the fundamental mechanisms that operate at micro- and nano-meter level across a wide-range of materials, in a way that is mathematically simple and requires no extensive knowledge of materials This integrated approach provides a conceptual presentation that shows how the microstructure of a material controls its mechanical behavior, and this is reinforced through extensive use of micrographs and illustrations New worked examples and exercises help the student test their understanding Further resources for this title, including lecture slides of select illustrations and solutions for exercises, are available online at wwwcambridgeorg/97800521866758

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Mechanical Behavior of Materials

Physics and phenomenology of strain hardening: the FCC case

Hall-Petch relation and boundary strengthening

The current understanding of the fundamentals of recrystallization is summarized. This includes understanding the as-deformed state. Several aspects of recrystallization are described: nucleation and growth, the development of misorientation during deformation, continuous, dynamic, and geometric dynamic recrystallization, particle effects, and texture. This article is authored by the leading experts in these areas. The subjects are discussed individually and recommendations for further study are listed in the final section.

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Current issues in recrystallization: a review

Large strain work hardening and textures

The connection between parameters that can be measured by means of instrumented indentation with the real mechanical properties has been a matter of discussion for several years. In fact, even hardness is not a readily measurable magnitude since the real contact area depends on both the elastic and plastic properties of the sample. Recently, Dao et al. [ Acta Mater49, 3899 (2001)] proposed a method based on numerical fittings to calculate by a forward-reverse algorithm the elastoplastic properties of a sample from the load-penetration curve obtained with a sharp indenter. This work will show, in contrast, that it is not possible to measure uniquely these mechanical properties of a sample in that way.

Absence of one-to-one correspondence between elastoplastic properties and sharp-indentation load penetration data

Size effects were seldom considered in plastic analysis until 15 years ago. However, many current technical applications of great and increasing importance — microelectronics, micro/nano-fabrication technologies, etc. — involve now plasticity confined to material distances well below 10−4 m. Knowledge of the plastic properties for pieces under such size is thus required for design. The interest on the scale influence on plastic problems is currently booming because several size effects in plasticity are known to exist in such small-scale range. This paper is centred in highlighting a very fundamental size effect on the flow stress and in the work hardening rate of crystalline materials. It is an intrinsic size effect in the sense that it does not require the development of mesoscopic plastic gradients in the material. The proposed size effect is qualitatively and quantitatively explained by the bias of an analogy of dislocation glide with other physical phenomena describable by the invasion percolation model, like the 2-D fluid invasion of a porous medium.

Intrinsic size effects in plasticity by dislocation glide

Low energy dislocation structures in highly deformed materials

Electro-discharge machining (EDM) versus hard turning and grinding—Comparison of residual stresses and surface integrity generated in AISI O1 tool steel

J. Gil Sevillano

Papers

Large strain work hardening and textures

Absence of one-to-one correspondence between elastoplastic properties and sharp-indentation load penetration data

Intrinsic size effects in plasticity by dislocation glide

Low energy dislocation structures in highly deformed materials

Electro-discharge machining (EDM) versus hard turning and grinding—Comparison of residual stresses and surface integrity generated in AISI O1 tool steel