Journal ArticleDOI
Twenty-five years of ultrafine-grained materials: achieving exceptional properties through grain refinement
Reads0
Chats0
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
More filters
Journal ArticleDOI
Strength of nano-twinned gradient nano-grained copper: Molecular dynamic simulation
TL;DR: In this article , molecular dynamics simulations are performed to reveal the underlying deformation mechanisms of gradient nano-grained materials with different-sized twins, and the results indicate that the critical twin boundary spacing where the strength begins to soften decreases and the maximum strength of the material increases with the declining of the gradient.
Journal ArticleDOI
Microstructure and properties of permanent joints of ultrafine-grained titanium alloys produced by linear friction welding
G. R. Suleymanova,A. Y. Medvedev,G. S. Dyakonov,T. V. Yakovleva,N. F. Izmailova,G. I. Raab,I. P. Semenova +6 more
Journal ArticleDOI
Room-Temperature Strengthening, Portevin-Le Chatelier Effect, High-Temperature Tensile Deformation Behavior, and Constitutive Modeling in a Lightweight Mg-Gd-Al-Zn Alloy
TL;DR: In this article , a lightweight novel Mg-1.85Gd-0.64Al 0.62Zn alloy was fabricated by innovative multidirectional forging and a hot-rolling technique, and microstructures and mechanical properties were studied at room and elevated temperatures with an optical microscope, an X-ray diffractometer, and a tensile tester.
Journal ArticleDOI
Finite element analysis of material deformation behaviour during DRECE: the sheet metal SPD process
TL;DR: In this article , the material deformation behavior during the innovative SPD process called DRECE (Dual Rolls Equal Channel Extrusion) has been analyzed by FEM simulations, where two various channel angles (108° and 113°) were taken into consideration, as well as two processing routes, A and C (without and with turning the strip upside-down between consecutive passes, respectively).
Journal ArticleDOI
The Flow Behavior of Ultrafine-Grained Materials
TL;DR: In this article, the authors examined the flow properties of ultrafine-grained materials using two severe plastic deformation (SPD) procedures of equal-channel angular pressing (ECAP) and high-pressure torsion (HPT).
References
More filters
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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
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.
Journal ArticleDOI
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...