The Art and Science of Tailoring Materials by Nanostructuring for Advanced Properties Using SPD Techniques

Valiev, Ruslan Z.; Langdon, Terence G.

doi:10.1002/adem.201000019

Cited by 76 publications

(25 citation statements)

References 116 publications

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“…Not only does nanostructuring of bulk materials by SPD processing permits a considerable enhancement of mechanical and physical properties, but it may also be used to create multifunctional materials. [4,8,9,31,188,189] In this respect, it can be anticipated that in the very near future the nanostructuring of materials by SPD processing techniques under different controlled regimes will provide new breakthroughs in the development of materials with superior properties for advanced structural and functional applications.…”

Section: Discussionmentioning

confidence: 99%

Fundamentals of Superior Properties in Bulk NanoSPD Materials

Valiev

Estrin

Horita

et al. 2015

Materials Research Letters

301

136

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Bulk nanoSPD materials are materials with nanostructural features, such as nanograins, nanoclusters, or nanotwins, produced by severe plastic deformation (SPD) techniques. Such nanostructured materials are fully dense and contamination free and in many cases they have superior mechanical and functional properties. Here, we provide a critical overview of such materials, with a focus on the fundamentals for the observed extraordinary properties. We discuss the unique nanostructures that lead to the superior properties, the underlying deformation mechanisms, the critical issues that remain to be investigated, future research directions, and the application potential of such materials.

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Section: Discussionmentioning

confidence: 99%

Fundamentals of Superior Properties in Bulk NanoSPD Materials

Valiev

Estrin

Horita

et al. 2015

Materials Research Letters

301

136

View full text Add to dashboard Cite

show abstract

“…However, the achievement of these properties is associated with the tailoring of specific microstructures which, in turn, are determined by the precise processing regimes and the nature of any further treatments. This strategy represents the art and science of nanostructuring for advanced properties using SPD techniques [14].…”

Section: Superstrength and Enhanced Mechanical Propertiesmentioning

confidence: 99%

Multifunctional Properties of Bulk Nanostructured Metallic Materials

Sabirov

Enikeev

Murashkin

et al. 2015

Bulk Nanostructured Materials With Multifunctional Properties

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This chapter focuses on multifunctional properties of bulk nanostructured metallic materials and structure-properties relationship therein. The most important structural factors affecting mechanical, physical, and chemical properties of the nanomaterials are discussed, and the strategies to their further improvement are outlined. Special attention is paid to nanostructural design for simultaneous improvement of mutually exclusive properties. Superstrength and Enhanced Mechanical PropertiesAlthough the mechanical and functional properties of all polycrystalline metallic materials are determined by several factors, the grain size of the material generally plays the most significant and often a dominant role. Thus, the strength of different polycrystalline materials is related to the grain size, d, through the Hall-Petch equation which states that the yield stress, σ y , is given bywhere σ o is termed the friction stress and k y the Hall-Petch constant [1,2]. It follows from Eq. 3.1 that the strength increases with a reduction in the grain size and this has led to an ever-increasing interest in fabricating materials with extremely small grain sizes. The fabrication of bulk samples and billets using equal channel angular pressing (ECAP), high pressure torsion (HPT), and other severe plastic deformation (SPD) techniques was a crucial first step in initiating investigations into the properties of bulk nanomaterials because the use of SPD processing permitted, and subsequently fully supported, a series of systematic studies using various nanostructured metallic materials including commercial alloys [3][4][5][6][7][8]

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“…In recent years, this problem has been widely analyzed in both experimental and theoretical studies [5,10]. Moreover, recently there was shown that UFG alloys can exhibit a considerably higher strength than the Hall-Petch relationship predicts for the range of ultrafine grains [12][13][14][15]. Moreover, recently there was shown that UFG alloys can exhibit a considerably higher strength than the Hall-Petch relationship predicts for the range of ultrafine grains [12][13][14][15].…”

Section: Strength and "Superstrength"mentioning

confidence: 99%