Ultrafine-Grained (UFG)
Incremental ECAP as a novel tool for producing ultrafine grained aluminium plates
... Abstract. Conventional equal channel angular pressing is an efficient technique to obtain bulk ultrafine grained materials (UFG) with extraordinary mechanical properties in the form of rods. In this ...
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Corrosion of Ultrafine Grained Materials by Severe Plastic Deformation, an Overview
... so-called ultrafine grain (UFG) structure in a bulk form for load-carrying structural ...of ultrafine grained (UFG) or nanostructured materials by SPD represented by equal-channel ...
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Mechanical behavior of ultrafine-grained materials under combined static and dynamic loadings
... Abstract. Ultrafine-grained (UFG) materials have extensive prospects for engineering application due to their excellent mechanical ...makes UFG materials more susceptible to deformation ...
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Incremental ECAP as a method to produce ultrafine grained aluminium plates
... Ultrafine grained (UFG) materials have attracted significant scientific interest due to their superior mechanical properties ...obtaining UFG structure in a number of metals and alloys ...
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Vacancies, twins, and the thermal stability of ultrafine grained copper
... for ultrafine-grained (UFG) metals are limited by their incompati- bility with high-purity single-phase ...demonstrate UFG microstructure stabilization in copper through a high density of twin ...
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Special Grain Boundaries in Ultrafine Grained Tungsten
... Field ion microscopy and computer simulation were used for the study of an atomic structure high-angle grain boundary in hard-drawn ultrafine-grained tungsten wire. These boundaries with special ...
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Ultrafine-Grained Surface Layers on S7 Tool Steel via Electron Beam Irradiation and Cryogenic Freezing.
... Electron beam (e-beam) treatment of tool steel surfaces has been available for several decades as an approach to create hard surface layers which potentially increase the service life of tools. Irradiation pulses ...
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Recent Trends in Producing Ultrafine Grained Steels
... Ultrafine grained steels with grain sizes below about 1 µm offer the prospect of high strength and high toughness with traditional steel ...in ultrafine grain ...of ultrafine grains steels ...
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Stability of Fatigued Dislocation Wall Structure in Coarse Grained and Ultrafine Grained Aluminum against Monotonic Tensile Deformation
... of UFG Al were much higher at 77 K than those at 300 K. Furthermore, UFG Al at 77 K maintained high UTS and high tensile ductility even after fatigue ...fatigued UFG Al disappeared during early ...
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Effects of Temperature and Strain Rate on Plastic Deformation of Ultrafine Grained Copper Prepared by Equal Channel Angular Pressing
... For ultrafine-grained (UFG) fcc metals with grain size between 100 nm and 1 µm, it is known that both strength and strain-rate sensitivity increase with decrease in grain size. 17) From the viewpoint of ...
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Toughness of Ultrafine Grained Ferritic Steels Fabricated by ARB and Annealing Process
... ultrafine grained SM490 steel. Their UFG steel was produced by mutliaxial bar rolling at warm temperatures, so that there were no bonded boundaries within the ...
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Radiation Tolerance of Ultrafine Grained Materials Fabricated by Severe Plastic Deformation
... These first results did not establish a marked advantage of grain size refinement to increase the ability of this material to sustain a considerable damaging dose. However, it should be noted that the microstructure of the ...
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Microstructure and mechanical properties of friction stir welded joints made from ultrafine grained aluminium 1050
... of UFG metals stimulated the development of their production ...Today, UFG metals can be efficiently produced by different variants of the severe plastic deformation (SPD) ...of UFG metals is the ...
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Historical Studies by Polish Scientist on Ultrafine Grained Materials by Severe Plastic Deformation
... Producing ultra fi ne-grained (UFG) materials by means of severe plastic deformation (SPD) methods has made a signi fi cant progress within the past few decades. The topic has been of interest since the ...
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Hall Petch Relationship and Dislocation Model for Deformation of Ultrafine Grained and Nanocrystalline Metals
... As mentioned in Introduction, discussion on thermally- activated deformation kinetics is indispensable to understand mechanical properties of UFG and NC materials. Further- more, for these materials, many studies ...
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Low Cycle Fatigue of Ultrafine Grained Aluminum at Low Temperatures
... localization occurred in the shear bands during cyclic deformation and micro-cracks initiated along the shear bands. Similarly, micro-cracks are observed along the shear bands in the present study, as shown by the arrow ...
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Superior Strength in Ultrafine Grained Materials Produced by SPD Processing
... in UFG metals and alloys, presently, however, it is possible that the presence of two characteristic grain size values is also valid for nano- structured SPD ...of UFG Al alloys is directly related to the ...
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Synthesis and Characterization of Ultrafine Grained 304 Stainless Steel through Machining
... The microstructures of 304 stainless steel chips created by plane strain machining at ambient temperature have been analyzed using scanning electron microscopy (SEM) and the crystallite size of the ultrafine chips ...
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Severe Plastic Deformation and Its Application on Processing Titanium: A Review
... produce Ultrafine Grained (UFG) structure that has superior mechanical ...applications. Ultrafine grained (UFG) titanium has even more applications rather than coarse ...
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Effect of Initial Microstructure on Superplasticity in Ultrafine Grained 18Cr 9Ni Stainless Steel
... is thermodynamically unstable phase at the elevated temper- ature. From this reason, the superplastic deformation behav- ior would be more significantly dependent on the holding time at the deformation temperature in this ...
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