Journal ArticleDOI
Twenty-five years of ultrafine-grained materials: achieving exceptional properties through grain refinement
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TLDR
In this article, an overview of the more recent developments in this field, with special emphasis on the opportunities for achieving homogeneity in the as-processed materials and on the general characteristics of the mechanical properties achieved after SPD processing.About:
This article is published in Acta Materialia.The article was published on 2013-11-01. It has received 614 citations till now.read more
Citations
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Effect of Pre-compression on Microstructure Evolution of AQ80 Magnesium Alloy in Forward Extrusion and Twist Deformation
TL;DR: In this paper, the effect of precompression on microstructure and texture of the AQ80 Mg alloy during FETD was systematically investigated and it was found that many tension twins were implanted into the as-cast AQ80 mg alloy by the 6% pre-compression treatment, providing sufficient nucleation sites for subsequent dynamic recrystallization.
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A Physical Model for the Initial Stages of the Fragmentation of Polycrystals in the Process of Developed Plastic Deformation
TL;DR: The contemporary physical ideas and models that make it possible to answer the question of why polycrystals undergo fragmentation at the stage of developed plastic deformation have been considered and analyzed as mentioned in this paper.
Journal ArticleDOI
Advantages of architectured harmonic structure in structural performance
TL;DR: In this paper, the authors present critical microstructure characteristics contributing to the superior structural performance of harmonic-structured materials using as an example of commercially-pure nickel, along with nano-indentation and tensile testing, as well as digital image correlation analysis.
Journal ArticleDOI
Cryogenic Milling of Titanium Powder
TL;DR: The effect of processing parameters on particle size and morphology, contamination of powder and its microhardness was investigated in this paper, where two types of milling balls were used: stainless steel balls and heavy tungsten carbide balls.
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Global view for grain refinement in ultra-low-C IF steel during high-strain deformation at various temperatures and strain rates
TL;DR: In this article, the formation of ultrafine and fine microstructures during high-strain deformation at various temperatures and strain rates were acquired in the present bcc-ferrite.
References
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Journal ArticleDOI
The Deformation and Ageing of Mild Steel: III Discussion of Results
TL;DR: In this paper, an attempt is made to explain the observed phenomena in the yielding and ageing of mild steel, described in two previous papers, in the general terms of a grain-boundary theory.
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Bulk nanostructured materials from severe plastic deformation
TL;DR: In this article, the authors present methods of severe plastic deformation and formation of nanostructures, including Torsion straining under high pressure, ECA pressing, and multiple forging.
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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.
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Using high-pressure torsion for metal processing: Fundamentals and applications
TL;DR: High pressure torsion (HPT) is a well-known technique for metal forming as discussed by the authors, where samples are subjected to a compressive force and concurrent torsional straining.
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Diffusional Viscosity of a Polycrystalline Solid
TL;DR: In this article, it is suggested that mosaic boundaries and boundaries between grains of nearly the same orientation may not serve as sources or sinks of the diffusion currents, in which case the creep rate will depend only on the configuration of grain boundaries having a sizable orientation differen...