2011
DOI: 10.1007/s10853-011-5768-1
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Twist-channel angular pressing: effect of the strain path on grain refinement and mechanical properties of copper

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Cited by 38 publications
(26 citation statements)
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“…However, given the unique strain path and complex material flow, the shear systems activated during ECAP and TCAP when applying the conventional ECAP routes are not identical. This was demonstrated by Kocich et al [49], by performing individual experiments in which they applied the known ECAP deformation routes, that is, route A (no rotation between passes), route Ba (±90 • rotation between passes), route Bc (+90 • rotation between passes, clockwise, and counter-clockwise), and route C (180 • rotation between passes), for both ECAP and TCAP. For example, processing of the sample via ECAP, route A, results in repetitive activation of identical shear systems.…”
Section: Strain Pathmentioning
confidence: 96%
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“…However, given the unique strain path and complex material flow, the shear systems activated during ECAP and TCAP when applying the conventional ECAP routes are not identical. This was demonstrated by Kocich et al [49], by performing individual experiments in which they applied the known ECAP deformation routes, that is, route A (no rotation between passes), route Ba (±90 • rotation between passes), route Bc (+90 • rotation between passes, clockwise, and counter-clockwise), and route C (180 • rotation between passes), for both ECAP and TCAP. For example, processing of the sample via ECAP, route A, results in repetitive activation of identical shear systems.…”
Section: Strain Pathmentioning
confidence: 96%
“…By these reasons, only Variant I is further characterized (referred to just as TCAP). The TCAP die ( Figure 3) consists of a single channel bent under the desired channel bending angle φ, preferably between 90° and 120° (depending on the processed material and its formability), and the first channel part contains a twist defined with multiple parameters, such as the twist slope The TCAP die ( Figure 3) consists of a single channel bent under the desired channel bending angle ϕ, preferably between 90 • and 120 • (depending on the processed material and its formability), and the first channel part contains a twist defined with multiple parameters, such as the twist slope angle β, twist rotation angle ω, and distance between the end of twist part within the channel and the channel bending L, all of which affect the final properties of the material and the amount and distribution of the imposed strain, as documented by the preliminary TCAP studies characterizing the method and describing its influence on the material behaviour, with the help of numerical modelling and subsequent practical experiments [47,49].…”
Section: Twist Channel Angular Pressingmentioning
confidence: 99%
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“…Experimental and numerical studies published elsewhere showed the strain imposed during a single pass to be higher for TCAP, when compared to ECAP [28]. The method has a favourable influence on strain homogenization across the sample crosssection, too [32,33]. Previously published studies thoroughly investigated the influence of die geometry on the overall imposed strain [34], and compared grains orientations, misorientations and textures in materials processed by TCAP and various numbers of ECAP passes [35,36].…”
Section: Introductionmentioning
confidence: 99%
“…Some researchers mixed TE with the other SPD approaches to develop more homogeneous strain distribution. Kocich et al [35] and Raj et al [26] combined ECAP and TE to investigate the effect of strain path on grain refinement and the equivalent strain distribution.…”
Section: Introductionmentioning
confidence: 99%