Scale up and application of equal-channel angular extrusion for the electronics and aerospace industries

Ferrasse, S.; Segal, V. M.; Alford, F.; Kardokus, Janine; Strothers, Susan

doi:10.1016/j.msea.2007.04.133

Cited by 96 publications

(40 citation statements)

References 35 publications

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“…From a practical point of view, a UFG structure can be easily produced in aluminum alloys by equal channel angular pressing (ECAP) [1]. This technique can be scaled up fairly easily for the fabrication of high-volume billets with commercially viable dimensions [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of an Al-Li-Mg-Sc-Zr Alloy Subjected to ECAP

Mogucheva

Kaibyshev

2016

Metals

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Abstract:The effect of post-deformation solution treatment followed by water quenching and artificial aging on microstructure and mechanical properties of an Al-Li-Mg-Sc-Zr alloy subjected to equal-channel angular pressing (ECAP) was examined. It was shown that the deformed microstructure produced by ECAP remains essentially unchanged under solution treatment. However, extensive grain refinement owing to ECAP processing significantly affects the precipitation sequence during aging. In the aluminum-lithium alloy with ultrafine-grained (UFG) microstructure, the coarse particles of the S 1 -phase (Al 2 LiMg) precipitate on high-angle boundaries; no formation of nanoscale coherent dispersoids of the δ -phase (Al 3 Li) occurs within grain interiors. Increasing the number of high-angle boundaries leads to an increasing portion of the S 1 -phase. As a result, no significant increase in strength occurs despite extensive grain refinement by ECAP.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of an Al-Li-Mg-Sc-Zr Alloy Subjected to ECAP

Mogucheva

Kaibyshev

2016

Metals

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“…The last two processes, ECAP and ARB, can potentially produce nanomaterials in sheets and rods in both sizes and quantities suitable for structural applications. [24][25][26] * Corresponding author. Email: carpenter@lanl.gov Nanostructuring (< 100 nm characteristic length scales) has been achieved primarily for cubic metals, such as face-centered cubic (fcc) and body-centered cubic (bcc) as well as composite combinations of the two, i.e.…”

mentioning

confidence: 99%

The Suppression of Instabilities via Biphase Interfaces During Bulk Fabrication of Nanograined Zr

Carpenter

Nizolek

McCabe

et al. 2014

Materials Research Letters

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“…[8] Boundary misorientations have been measured in several studies of ECAE plates. [11,12] However, since these measurements were conducted only in one plane, a complete description of the boundary network formed during ECAE deformation of plates has not been provided.…”

Section: Ov Mishin Vm Segal and S Ferrassementioning

confidence: 99%

Quantitative Microstructural Characterization of Thick Aluminum Plates Heavily Deformed Using Equal Channel Angular Extrusion

Mishin

Segal

Ferrasse

2012

Metall Mater Trans A

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A detailed quantitative analysis of the microstructure has been performed in three orthogonal planes of 15-mm-thick aluminum plates heavily deformed via two equal channel angular extrusion (ECAE) routes. One route was a conventional route A with no rotation between passes. Another route involved sequential 90 deg rotations about the normal direction (ND) between passes. The microstructure in the center of these plates, and especially the extent of microstructural heterogeneity, has been characterized quantitatively and compared with that in bar samples extruded via either route A or route Bc with 90 deg rotations about the longitudinal axis. Statistically robust data were obtained in this work using gallium enhanced microscopy and EBSD mapping of large sample areas. For the plate processed using route A, the fraction of high-angle boundaries was found to strongly depend on the inspection plane, being smallest in the plane perpendicular to the ND (plane Z), where the largest subgrain size and most profound microstructural heterogeneities were also revealed. In comparison, the plate extruded with 90 deg rotations about the ND was less heterogeneous and contained smaller subgrains in plane Z. Comparing the plate and bar samples, the most refined and least heterogeneous microstructure was observed in the route Bc bar sample. The differences in the microstructure are reflected in the hardness data; the hardness is lowest after ECAE via route A and greatest in the bar sample processed using route Bc.

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Scale up and application of equal-channel angular extrusion for the electronics and aerospace industries

Cited by 96 publications

References 35 publications

Microstructure and Mechanical Properties of an Al-Li-Mg-Sc-Zr Alloy Subjected to ECAP

Microstructure and Mechanical Properties of an Al-Li-Mg-Sc-Zr Alloy Subjected to ECAP

The Suppression of Instabilities via Biphase Interfaces During Bulk Fabrication of Nanograined Zr

Quantitative Microstructural Characterization of Thick Aluminum Plates Heavily Deformed Using Equal Channel Angular Extrusion

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