Equal channel angular pressing with converging billets—Experiment

Rosochowski, Andrzej; Olejnik, Lech; Richert, J.; Rosochowska, Malgorzata; Richert, M.

doi:10.1016/j.msea.2012.09.079

Cited by 15 publications

(14 citation statements)

References 7 publications

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“…This convinced the authors that I-AS should lead to a similar grain refinement as in ECAP and I-ECAP. Consequently, it has been decided not to check the microstructure of AA1070 after I-AS because the same material was investigated in many earlier publications (interesting TEM images has been published recently for AA1070 subjected to one pass of ECAP with converging billets [13]). Looking at the benefits of I-AS, it increases the choice of billet shapes by giving an option to plastically split a billet into two billets.…”

Section: Discussionmentioning

confidence: 99%

Severe plastic deformation by incremental angular splitting

2013

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Section: Discussionmentioning

confidence: 99%

Severe plastic deformation by incremental angular splitting

2013

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“…Strain appears to be similar, except the bottom part of the billet, where it is smaller for ECAP with converging billets. ECAP with converging billets reduces friction in the output channel, which leads to a lower value of the maximum process force [5]. For friction coefficient µ=0.1, the force reduction predicted by plane strain FE simulation was 23% (Fig.…”

Section: Ecap With Converging Billetsmentioning

confidence: 95%

“…The system doubles productivity compared to the case of processing a single billet. 3 shows a comparison of classical ECAP of a single billet (without moving die walls) and ECAP with two converging billets in terms of strain distribution [5]. The finite element simulation (using Abaqus/Explicit ) was carried out for pure aluminium billets, with 8 x 8 mm cross section.…”

Section: Ecap With Converging Billetsmentioning

confidence: 99%

Incremental ECAP with Converging Billets

Rosochowski¹,

Olejnik

2013

KEM

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Abstract.A new concept of incremental equal channel angular pressing (I-ECAP) with converging billets is proposed and simulated numerically. It follows a recently introduced process of ECAP with converging billets, in which the contact surface between converging billets plays the same role as a movable die wall in the output channel of classical ECAP and thus reduces friction and the process force. The process productivity is doubled and material pickup, especially problematic in the output channel, avoided. However, ECAP with converging billets, as any ECAP-based process, suffers from a limited length of the billets it can process. This paper proposes an incremental version of ECAP with converging billets, which enables processing very long billets. Additionally, a new option for ECAP or I-ECAP with converging billets is considered, which assumes their separation with a movable tool. This tool can also be used to apply a back force. FEM simulations of all these processes enable their comparison in terms of strain distribution and the force required.

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“…ECAP was also a subject of a number of modifications to improve its effectiveness and possibility to process hard‐to‐deform materials, for example, additional back pressure, rotary die, matrix with two parallel channels, or with two converging billets to mention only a few of such modifications. Recently, Incremental ECAP (I‐ECAP) has been developed and proved as an efficient method of producing UFG metals in the form of plates or bars .…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Corrosion Behavior of the Friction Stir Welded Joints Made from Ultrafine Grained Aluminum

et al. 2017

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This version is available at https://strathprints.strath.ac.uk/60605/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. is currently known as one of the most developed.[2] The material deformation is performed by a 24 simple shear [3] , while a sample is pressed through two intersecting channels with the same cross-25 sections.[4] 26 3 ECAP was also a subject of a number of modifications to improve its effectiveness and possibility 1 to process hard-to-deform materials, e.g. additional back pressure [5] , rotary die [6] , matrix with two 2 parallel channels [7] or with two converging billets [8] to mention only a few of such modifications. 3Recently, Incremental ECAP (I-ECAP) [9] has been developed and proved as an efficient method of 4 producing UFG metals in the form of plates [10] or bars. [11] In particular, the plate shape seems to be 5 very promising in the case of further applications. fragmentation during plastic deformation may result in improved corrosion properties due to the 9 reduction of the cathodic surface.[17] 10In this study, the correlation between microstructure changes in base materials (due to SPD 11 processing) and stir zones (due to FSW processing) and their electrochemical response will be 12 discussed with the main emphasis on the influence of grains, grain boundaries and particles. Experimental 14The investigated material was commercially pure aluminium (99.50 wt.%). According to EN AW- for materials with different number of I-ECAP passes, which comes from their structural 1 differences and which will not be the subject of the present study. The exact values were as follows: 13The samples in the form of thin foils were used. They were prepared using a wire saw, ground down also determined. SEM observations were also used in order to characterize the particles observed in 1 the microstructure. Samples were prepared the same way as for EBSD investigation. 2Before each electrochemical test, the sa...

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Equal channel angular pressing with converging billets—Experiment

Cited by 15 publications

References 7 publications

Severe plastic deformation by incremental angular splitting

Severe plastic deformation by incremental angular splitting

Incremental ECAP with Converging Billets

Microstructure and Corrosion Behavior of the Friction Stir Welded Joints Made from Ultrafine Grained Aluminum

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