grain refinement
Grain Refinement and Hall-Petch Strengthening of Magnesium Alloy Via Alloying and Hot Extrusion
... microstructural refinement and enhancement of the mechanical properties of magnesium alloy have been ...the grain refinement of α-Mg in the as-cast ...average grain size of the as-cast ...
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Grain Refinement and Ductility Improvement by Hot Extrusion Using a Heteromorphic Die with Small Holes
... the grain refinement seems not to be attributed to the apparent extrusion ratio but rather is affected by the total perimeter length of the die ...the grain size is much finer than that in the billet ...
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Grain Refinement of Dual Phase Steel via Tempering of Cold-Rolled Martensite
... average grain size of ~ ...ferrite grain size of ~ 20 µm and average martensite island size of ~ 5 µm was also produced by intercritical annealing of the as-received ferritic-pearlitic ...
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Grain refinement in technically pure aluminium plates using incremental ECAP processing
... of grain/subgrain size measurements (from EBSD) on all three planes after 1, 4 and 8 ...Generally grain size as well as CV are reduced with the increasing number of ...that grain size diversity ...
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Effect of Grain Refinement on Electrochemical Behavior of Al– Zn–Mg–Cu Alloys
... with grain size. The link between grain size and corrosion resistance has been reviewed and studied by ...as grain size decreases for high purity aluminium, and they further proposed that the ...
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Effects of Grain Refinement on the Corrosion Behaviour of Microalloyed Steel in Sulphuric Acid Solutions
... solutions after different microstructural conditions and temperatures have been investigated. Due to repeated quenching from a temperature just below the lower critical temperature the grain refinement of ...
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Molecular Dynamics Simulation of Grain Refinement in a Polycrystalline Material under Severe Compressive Deformation
... Grain refinement in a polycrystalline material resulting from severe compres- sive deformation was simulated using molecular ...the grain boundaries or triple junction and then spread within the ...
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Grain Refinement of High Purity Mg Al Alloy Ingots and Influences of Minor Amounts of Iron and Manganese on Cast Grain Size*
... The grain size of the high-purity alloy is refined naturally without the use of a grain refiner or superheat treatment, and the addition of small amounts of Fe and Mn to the alloy coarsens the ...both ...
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Phase-field modelling of rapid solidification in alloy systems: Spontaneous grain refinement effects
... of grain refinement would tend to suggest the former of these possibilities is more likely, as would an apparent change in the morphology of the growth front revealed by high-speed imaging ...
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A Study On Effect Of Ultrafine Grain Refinement On Mechanical Properties Of Non-Heat Treatable Alloys
... Among the procedure devised for grain refinement, severe plastic deformation is of particularly interest and the focus of this study. This project work deals with the concept of ECAP used to introduce ...
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The origins of spontaneous grain refinement in deeply undercooled metallic melts
... mesh refinement, implicit time-stepping and a non- linear multigrid solver this model can be extended to high undercoolings and large Lewis ...highly grain refined microstructure and the occurrence of such ...
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Mechanism selection for spontaneous grain refinement in undercooled metallic melts
... spontaneous grain refinement alters or removes the original growth structure, continuous measurements of the original dendrite length scale cannot be made as a function of undercooling (and, by extension, ...
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Grain refinement kinetics in a low alloyed Cu-Cr-Zr
... Keywords: Cu-Cr-Zr alloy; grain refinement; severe plastic deformation; triple junctions; grain 22.. refinement kinetics 23.[r] ...
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Grain Refinement during Rapid Solidification of Aluminum Zirconium Alloys Using Electrospark Deposition
... reduced grain size, 1 4) but manufactur- ing costs remain a serious hurdle for their commercial ...induce grain growth in the heat affected zone and result in a coarse micro-scale solidification structure, ...
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Role of Lanthanum in Grain Refinement and Tensile Properties of Cast Mg La Zr Alloys
... greater grain re fi ne- ment effect. However, the grain growth in the Mg Zr alloy might have taken place right after solidification, while it did not occur or was hindered in the MgLaZr alloys due to ...
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Grain Refinement in As Cast 7475 Aluminum Alloy under Hot Equal Channel Angular Pressing
... Microstructural evolution taking place during equal channel angular pressing (ECAP) was studied in an as-cast 0.16%Zr modified 7475 aluminum alloy at a temperature of 673 K. The structural changes are characterized by ...
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Mechanical Property Improvements in Aluminum Alloy through Grain Refinement using Friction Stir Process
... the grain sizes of 3 mm and below showed a discontinuous type of transition from elastic to plastic deformation which produced the abrupt stress drop phenomenon during tensile deforma- ...the grain size. In ...
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Effect of Pass Strain on Grain Refinement in 7475 Al Alloy during Hot Multidirectional Forging
... relative difference in crystal orientation between two adja- cent scan points with step of 1 mm. In Fig. 5(a), does not exceed generally 2 -3 except some spots with > 10 to 15 , which corresponds to deformation-induced ...
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Grain Refinement of Aluminum Alloy Bar by a Modified RAP Process for Semi Solid Forming
... recrystallized grain, which further induces the decline of av- erage grain ...average grain size may be that the RF process makes the deformation energy to be rapidly accumulated and abundant- ly ...
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Effect of Copper on Tensile Properties and Grain Refinement of Steel and its Relation to Precipitation Behavior
... from grain-size dependence of commer- cial pure ...by grain-refinement, as represented by the Hall-Petch relation, and that by precip- itation does not hold, especially at grain-size range less than 1 ...
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