Results 261 to 270 of about 252,373 (307)

Grain and subgrain boundaries in ultrafine-grained materials

Materials Characterization, 2009
The attractive metallographic electron backscatter diffraction (EBSD) method is used to describe the effect of the number N of passes on the subgrain and grain structures of pure aluminium and copper processed by equal channel angular pressing (ECAP).
Saxl, I. (Ivan), Kalousová, A., Ilucová, L. (Lucia), Sklenička, V. (Václav)   +3 more
openaire   +2 more sources

Nanocrystalline and Ultrafine Grained Materials by Mechanical Alloying

Materials Science Forum, 2007
Recent research at Harbin Institute of Technology on the synthesis of nanocrystalline and untrafine grained materials by mechanical alloying is reviewed. Examples of the materials include aluminum alloy, copper alloy, Ti/Al composite, magnesium-based hydrogen storage material, and Nd2Fe14B/α-Fe magnetic nanocomposite.
Erde Wang, Lian Xi Hu
openaire   +1 more source

Superior cryogenic tensile properties of ultrafine-grained CoCrNi medium-entropy alloy produced by high-pressure torsion and annealing

Scripta Materialia, 2019
Ultrafine-grained materials with nanotwins are expected to produce a remarkable combination of strength and ductility. In the present study, ultrafine-grained CoCrNi medium-entropy alloy with nanotwins is fabricated by high-pressure torsion followed by ...
P. Sathiyamoorthi, J. Moon, J. Bae, Peyman Asghari-Rad, Hyoung-Seop Kim   +4 more
semanticscholar   +1 more source

Evaluating the Flow Properties of Ultrafine-Grained Materials

Advanced Materials Research, 2013
Processing through the application of severe plastic deformation (SPD) provides an opportunity for achieving significant grain refinement, typically to the submicrometer or even the nanometer level. If these small grains are reasonably stable at elevated temperatures, it is possible to achieve excellent superplastic capabilities at very rapid strain ...
Kawasaki, Megumi, Langdon, Terence G.
openaire   +2 more sources

Gradation Rolling – Technology for graded ultrafine‐grained materials

Materialwissenschaft und Werkstofftechnik, 2010
AbstractZur erheblichen Verbesserung mechanischer Eigenschaften und einer belastungsgerechten Gestaltung von Bauteilen wurde ein Verfahren zur Halbzeugmodifikation entwickelt, dass den Ansatz der gezielten Einstellung einer variablen Mikrostruktur verfolgt.
R. Neugebauer, A. Sterzing, M. Bergmann
openaire   +1 more source

Applying Conventional Creep Mechanisms to Ultrafine-Grained Materials

2017
The creep behaviour of polycrystalline materials is now well described through a series of equations that delineate various mechanisms describing intragranular and intergranular flow processes. The recent ability to fabricate metals with exceptionally small grain sizes within the submicrometer and nanometer ranges has raised questions concerning the ...
Megumi Kawasaki, Terence G. Langdon
openaire   +1 more source

Powder Metallurgy Route to Ultrafine‐Grained Refractory Metals

Advanced Materials, 2023
Xuanhui Qu, Yanhao Dong
exaly  

Ultrafine grained metals and metal matrix nanocomposites fabricated by powder processing and thermomechanical powder consolidation

Progress in Materials Science, 2022
Deliang Zhang
exaly  

Processing ultrafine-grained and nanostructured materials

2021
Farid Z. Utyashev, Georgy I. Raab, Alexander P. Zhilyaev   +2 more
openaire   +1 more source

Determination of the strain-rate sensitivity of ultrafine-grained materials by spherical nanoindentation

, 2017
Patrick Feldner, B. Merle, M. Göken
semanticscholar   +1 more source