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Nanostructure characterisation of flow-formed Cr–Mo–V steel using transmission Kikuchi diffraction technique

S. Birosca, R. Ding, S. Ooi, R. Buckingham, C. Coleman, K. Dicks, Soran Birosca Orcid Logo

Ultramicroscopy, Volume: 153, Pages: 1 - 8

Swansea University Author: Soran Birosca Orcid Logo

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DOI (Published version): 10.1016/j.ultramic.2015.02.001

Abstract

Nowadays flow-forming has become a desired near net shape manufacturing method as it provides excellent mechanical properties with improved surface finish and significant manufacturing cost reduction. However, the material is subjected to excessive plastic deformation during flow-forming process, ge...

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Published in: Ultramicroscopy
ISSN: 0304-3991
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa21104
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first_indexed 2015-05-07T02:10:08Z
last_indexed 2019-03-07T19:10:18Z
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spelling 2019-03-07T16:39:43.9471246 v2 21104 2015-05-06 Nanostructure characterisation of flow-formed Cr–Mo–V steel using transmission Kikuchi diffraction technique 3445603fcc2ff9d27b476a73b223a507 0000-0002-8380-771X Soran Birosca Soran Birosca true false 2015-05-06 EEN Nowadays flow-forming has become a desired near net shape manufacturing method as it provides excellent mechanical properties with improved surface finish and significant manufacturing cost reduction. However, the material is subjected to excessive plastic deformation during flow-forming process, generating a very fine and complex microstructure. In addition, the intense dislocation density and residual stress that is generated in the component during processing makes the microstructure characterisation using conventional micro-analytical tools challenging. Thus, the microstructure/property relationship study in such a material is rather difficult. In the present study a flow-formed Cr–Mo–V steel nanostructure and crystallographic texture were characterised by means of Transmission Kikuchi Diffraction (TKD). Here, TKD is shown to be a powerful technique in revealing very fine martensite laths within an austenite matrix. Moreover, fine precipitates in the order of 20–70 nm on the martensite lath boundaries were clearly imaged and characterised. This greatly assisted in understanding the preferable site formation of the carbides in such a complex microstructure. The results showed that the actual TKD spatial resolution was in the range of 5–10 nm using 25 kV for flow-formed Cr–Mo–V steel. Journal Article Ultramicroscopy 153 1 8 0304-3991 30 6 2015 2015-06-30 10.1016/j.ultramic.2015.02.001 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2019-03-07T16:39:43.9471246 2015-05-06T13:20:24.4497048 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised S. Birosca 1 R. Ding 2 S. Ooi 3 R. Buckingham 4 C. Coleman 5 K. Dicks 6 Soran Birosca 0000-0002-8380-771X 7
title Nanostructure characterisation of flow-formed Cr–Mo–V steel using transmission Kikuchi diffraction technique
spellingShingle Nanostructure characterisation of flow-formed Cr–Mo–V steel using transmission Kikuchi diffraction technique
Soran Birosca
title_short Nanostructure characterisation of flow-formed Cr–Mo–V steel using transmission Kikuchi diffraction technique
title_full Nanostructure characterisation of flow-formed Cr–Mo–V steel using transmission Kikuchi diffraction technique
title_fullStr Nanostructure characterisation of flow-formed Cr–Mo–V steel using transmission Kikuchi diffraction technique
title_full_unstemmed Nanostructure characterisation of flow-formed Cr–Mo–V steel using transmission Kikuchi diffraction technique
title_sort Nanostructure characterisation of flow-formed Cr–Mo–V steel using transmission Kikuchi diffraction technique
author_id_str_mv 3445603fcc2ff9d27b476a73b223a507
author_id_fullname_str_mv 3445603fcc2ff9d27b476a73b223a507_***_Soran Birosca
author Soran Birosca
author2 S. Birosca
R. Ding
S. Ooi
R. Buckingham
C. Coleman
K. Dicks
Soran Birosca
format Journal article
container_title Ultramicroscopy
container_volume 153
container_start_page 1
publishDate 2015
institution Swansea University
issn 0304-3991
doi_str_mv 10.1016/j.ultramic.2015.02.001
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 Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 0
active_str 0
description Nowadays flow-forming has become a desired near net shape manufacturing method as it provides excellent mechanical properties with improved surface finish and significant manufacturing cost reduction. However, the material is subjected to excessive plastic deformation during flow-forming process, generating a very fine and complex microstructure. In addition, the intense dislocation density and residual stress that is generated in the component during processing makes the microstructure characterisation using conventional micro-analytical tools challenging. Thus, the microstructure/property relationship study in such a material is rather difficult. In the present study a flow-formed Cr–Mo–V steel nanostructure and crystallographic texture were characterised by means of Transmission Kikuchi Diffraction (TKD). Here, TKD is shown to be a powerful technique in revealing very fine martensite laths within an austenite matrix. Moreover, fine precipitates in the order of 20–70 nm on the martensite lath boundaries were clearly imaged and characterised. This greatly assisted in understanding the preferable site formation of the carbides in such a complex microstructure. The results showed that the actual TKD spatial resolution was in the range of 5–10 nm using 25 kV for flow-formed Cr–Mo–V steel.
published_date 2015-06-30T03:24:59Z
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score 11.012924

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