Journal ArticleDOI
Equal channel angular extrusion: from macromechanics to structure formation
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In this article, the authors present a continual analysis of stress, strain, shear planes, steady and localized flow, multipass processing which define microstructural effects and are critical for attained results.Abstract:
A special deformation technique, equal channel angular extrusion, (ECAE) to control materials structure, texture and physico-mechanical properties is described in detail. The paper presents a continual analysis of stress, strain, shear planes, steady and localized flow, multipass processing which define microstructural effects and are critical for attained results. Links between macromechanics of simple shear and grain refinement are outlined.read more
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Principles of equal-channel angular pressing as a processing tool for grain refinement
TL;DR: In this article, a review examines recent developments related to the use of ECAP for grain refinement including modifying conventional ECAP to increase the process efficiency and techniques for up-scaling the procedure and for the processing of hard-to-deform materials.
Journal ArticleDOI
Extreme grain refinement by severe plastic deformation: A wealth of challenging science
Yuri Estrin,Alexei Vinogradov +1 more
TL;DR: A brief overview of the available SPD technologies is given in this paper, along with a summary of unusual mechanical, physical and other properties achievable by SPD processing, as well as the challenges this research is facing, some of them generic and some specific to the nanoSPD area.
Journal ArticleDOI
High temperature shape memory alloys
TL;DR: Shape memory alloys (SMAs) with high transformation temperatures can enable simplifications and improvements in operating efficiency of many mechanical components designed to operate at tem... as mentioned in this paper, which can enable simplified and improved operating efficiency.
Journal ArticleDOI
Overview of processing, microstructure and mechanical properties of ultrafine grained bcc steels
TL;DR: In this paper, an overview of various techniques to fabricate ultrafine grained bcc steels, the corresponding microstructures, and the resulting spectrum of mechanical properties is presented.
Journal ArticleDOI
Challenges and advances in nanocomposite processing techniques
TL;DR: In this article, the results from numerous studies on various methods for manufacturing nanocomposites with improved properties and retained nanostructures are discussed in detail in detail and recent advances are discussed.
References
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Book
The mathematical theory of plasticity
TL;DR: In this paper, the solution of two-dimensional non-steady motion problems in two dimensions is studied. But the solution is not a solution to the problem in three dimensions.
Journal ArticleDOI
Materials processing by simple shear
TL;DR: In this paper, simple shear can be considered a "near ideal" deformation method for structure and texture formation in metal-working, and the unusual effects that are observed in both the structure and physical-mechanical properties of various metals and alloys suggest many new applications of the simple Shear method in materials synthesis and processing.
Journal ArticleDOI
Current issues in recrystallization: a review
Roger D. Doherty,D.A. Hughes,F.J. Humphreys,John J. Jonas,D. Juul Jensen,Michael E. Kassner,Wayne E. King,Terry R. McNelley,H.J. McQueen,Anthony D. Rollett +9 more
TL;DR: The current understanding of the fundamentals of recrystallization is summarized in this paper, which includes understanding the as-deformed state, nucleation and growth, the development of misorientation during deformation, continuous, dynamic, and geometric dynamic recystallization, particle effects, and texture.
Journal ArticleDOI
Principle of equal-channel angular pressing for the processing of ultra-fine grained materials
TL;DR: In this paper, it has been shown that submicrometer-grained structures may be produced in a wide range of materials (e.g. pure metals, metallic alloys including superalloys, intermetallics, semiconductors) by subjecting these materials to a very high plastic strain using either equal-channel angular (ECA) pressing or torsion straining under high pressure.
Journal ArticleDOI
The process of grain refinement in equal-channel angular pressing
TL;DR: In this article, experiments were conducted on high purity aluminum to investigate the process of grain refinement during equal-channel angular (ECA) pressing, where samples were subjected to 1 to 4 pressings and then sectioned for microstructural examination in three mutually perpendicular directions.