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Study of structure of naturally aged aluminium after twist channel angular pressing

Lenka Kunčická, Radim Kocich, Vasyl Ryukhtin, Jonathan C.T. Cullen, Nicholas Lavery Orcid Logo

Materials Characterization

Swansea University Author: Nicholas Lavery Orcid Logo

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DOI (Published version): 10.1016/j.matchar.2019.03.045

Abstract

Twist channel angular pressing (TCAP), the severe plastic deformation (SPD) technology developed recently to increase the efficiency of the imposed strain and its homogeneity within a single pass, is an effective process combining channel bending and twist extrusion in a single die. The presented st...

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Published in: Materials Characterization
ISSN: 1044-5803
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa49885
first_indexed 2019-04-04T16:40:52Z
last_indexed 2019-07-17T15:33:45Z
id cronfa49885
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spelling 2019-07-17T09:42:11.9320250 v2 49885 2019-04-04 Study of structure of naturally aged aluminium after twist channel angular pressing 9f102ff59824fd4f7ce3d40144304395 0000-0003-0953-5936 Nicholas Lavery Nicholas Lavery true false 2019-04-04 ACEM Twist channel angular pressing (TCAP), the severe plastic deformation (SPD) technology developed recently to increase the efficiency of the imposed strain and its homogeneity within a single pass, is an effective process combining channel bending and twist extrusion in a single die. The presented study analyses the phenomena of substructure development, precipitation, structural units' orientations, and the occurrence of residual stress, as well as electric resistivity and microhardness, in commercial purity aluminium naturally aged for two years at room temperature after processing via single pass TCAP. The results are compared with the findings for the TCAP sample right after processing; selected results are also compared with the results for the sample after TCAP and one year of natural ageing, and with a sample processed by conventional ECAP. The analyses showed the substructure to recover substantially, the grain size decreased to submicron size. The residual stress within the grains introduced by the energy accumulated via the severe imposed strain relaxed significantly by the structure restoration, as well as by intensive precipitation. The aged TCAP sample specific electric resistivity was comparable to the resistivity of the original commercially pure aluminium (2.652E−05 and 2.635E−05 Ω·mm2·m−1, respectively), however, the microhardness mapping showed increased mechanical properties with homogeneous distribution. Journal Article Materials Characterization 1044-5803 Twist channel angular pressing, Aluminium, Electron microscopy, Neutron diffraction, Electric resistivity, Precipitation 31 12 2019 2019-12-31 10.1016/j.matchar.2019.03.045 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University 2019-07-17T09:42:11.9320250 2019-04-04T09:27:54.2228640 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Lenka Kunčická 1 Radim Kocich 2 Vasyl Ryukhtin 3 Jonathan C.T. Cullen 4 Nicholas Lavery 0000-0003-0953-5936 5 0049885-04042019093045.pdf kuncicka2019.pdf 2019-04-04T09:30:45.1130000 Output 7130547 application/pdf Accepted Manuscript true 2020-03-30T00:00:00.0000000 true eng
title Study of structure of naturally aged aluminium after twist channel angular pressing
spellingShingle Study of structure of naturally aged aluminium after twist channel angular pressing
Nicholas Lavery
title_short Study of structure of naturally aged aluminium after twist channel angular pressing
title_full Study of structure of naturally aged aluminium after twist channel angular pressing
title_fullStr Study of structure of naturally aged aluminium after twist channel angular pressing
title_full_unstemmed Study of structure of naturally aged aluminium after twist channel angular pressing
title_sort Study of structure of naturally aged aluminium after twist channel angular pressing
author_id_str_mv 9f102ff59824fd4f7ce3d40144304395
author_id_fullname_str_mv 9f102ff59824fd4f7ce3d40144304395_***_Nicholas Lavery
author Nicholas Lavery
author2 Lenka Kunčická
Radim Kocich
Vasyl Ryukhtin
Jonathan C.T. Cullen
Nicholas Lavery
format Journal article
container_title Materials Characterization
publishDate 2019
institution Swansea University
issn 1044-5803
doi_str_mv 10.1016/j.matchar.2019.03.045
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
document_store_str 1
active_str 0
description Twist channel angular pressing (TCAP), the severe plastic deformation (SPD) technology developed recently to increase the efficiency of the imposed strain and its homogeneity within a single pass, is an effective process combining channel bending and twist extrusion in a single die. The presented study analyses the phenomena of substructure development, precipitation, structural units' orientations, and the occurrence of residual stress, as well as electric resistivity and microhardness, in commercial purity aluminium naturally aged for two years at room temperature after processing via single pass TCAP. The results are compared with the findings for the TCAP sample right after processing; selected results are also compared with the results for the sample after TCAP and one year of natural ageing, and with a sample processed by conventional ECAP. The analyses showed the substructure to recover substantially, the grain size decreased to submicron size. The residual stress within the grains introduced by the energy accumulated via the severe imposed strain relaxed significantly by the structure restoration, as well as by intensive precipitation. The aged TCAP sample specific electric resistivity was comparable to the resistivity of the original commercially pure aluminium (2.652E−05 and 2.635E−05 Ω·mm2·m−1, respectively), however, the microhardness mapping showed increased mechanical properties with homogeneous distribution.
published_date 2019-12-31T07:29:23Z
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score 11.056659

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