[PDF] Top 20 Grain Refinement in As Cast 7475 Aluminum Alloy under Hot Equal Channel Angular Pressing

... in grain refinement. Under intense plastic deformation at low temperatures, several GNBs, such as microband, kink or deformation band, ...of grain refinement can be directly associated with ... See full document

... during equal channel angular pressing (ECAP) was studied in an as- cast ...modified 7475 aluminium alloy at a temperature of 673 ...strain. Pressing to a strain of ... See full document

... average grain size of about 14, 9 µm and 4 µm, ...final grain size of 1 μm ...Al6061 alloy. It was reported [21,28] that for the sample with the initial grain size of 75 µm, after performing ... See full document

... A hot rolled aluminum alloy AA1070 was used in this workwith chemical composition of ...and hot rolled to a 32 mm final thickness. The hot rolling was performed at temperature of ...in ... See full document

... Equal-channel angular pressing (ECAP) was applied to achieve grain refinement of Al–3 mass%Mg alloys containing ...fine grain sizes produced by ECAP were essentially ... See full document

... Equal channel angle pressing (ECAP) is a processing procedure whereby an intense plastic strain is imposed by pressing a sample in a special die ...substantial grain refinement ... See full document

... present aluminum alloy, some samples were continuously ECAPed up to ¾ = 12 without any interruption at 573 K [see ...mean grain size developed was about ...during hot ECAP. Namely, even if a ... See full document

... of grain refinement by severe plastic ...Pawley refinement analyses of the diffraction data of nonannealed specimens it was possible to estimate the lattice strain broadening contribution to peak ... See full document

... machine, cast, extrude, roll, etc ...the equal-channel angular pressing (ECAP) route proved to produce ultrafine-grained bulk samples in a fully dense condition without changing the ... See full document

... ultrafine grain sizes in a range of materials, very recent results have shown that the high pressures inherent in ECAP may lead also to a breaking of precipitates in metallic alloys ... See full document

... of grain subdivision, ...as grain size and misorientation ...aultrafine grain material, it is necessary both to impose an exceptionally high strain in order to introduce a high density of ... See full document

... The FE software used to simulate the incremental NECAP (I-NECAP) process was Abaqus/Explicit. The initial billet was in the form of a single 155 mm long round bar with 21.7 mm diameter and rounded top end (Fig. 1). Only ... See full document

... solution to generate pitting corrosion. The morphology of the pitting area is shown in Fig. 6. It was found from SEM images at an initial stage of pitting corrosion [(a), (b)] that cracks proceeded in anodic oxide films ... See full document

... 4b, 5b, 6b, 7b, 8b, 9b, d, 10) we see a smaller dead zone size dDb. Computational flow lines (Fig. 3) are the lines near which flow function ψ (Fig. 4) is constant ψ = const. The computed effect in Fig. 4, which shows ... See full document

... straining after processing for more than 4 passes. It should be noted that the ECAP sample used in this study was already pressed for 8 passes before compression testing. Never- theless, the hardness decreases as plotted ... See full document

... achieved the required level of deformation. When the simple shear taking place in a thin layer equal channels crossing plane, the deformation of billet will occur. Thus, with the high strain and more fine grains ... See full document

... temperature under moderate ...leaving grain boundaries in the nonequilibrium ...the grain boundary during severe plastic deformation was obtained in copper bicrystals subjected to ... See full document

... studies, equal channel angular pressing process (ECAP) and modified ECAP processes are simulated under ideal conditions to compare the deformation ...the equal channel ... See full document

... Besides that, several method and technique are apply while carrying this research which are Equal-channel angular pressing (ECAP) and heat treatment. ECAP is a trustworthy method to achieve ... See full document

... The samples annealed at 873 K and 973 K for 1 hour were tested for their tensile properties along with as-received and as-ECA pressed samples (Fig. 8). The annealed samples were selected since the matrix is completely ... See full document