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A new EBSD based methodology for the quantitative characterisation of microstructures formed by displacive fcc–bcc transformations
University West, Department of Engineering Science, Research Environment Production Technology West. (Svetsning PTW)
ESAB AB, Lindholmsallén 9, Box 8004, SE-40277 Gothenburg.
University West, Department of Engineering Science, Division of Manufacturing Processes. (Welding Technology, PTW)ORCID iD: 0000-0001-8822-2705
2013 (English)In: Micron, ISSN 0968-4328, E-ISSN 1878-4291, Vol. 45, no February, 45-54 p.Article in journal (Refereed) Published
Abstract [en]

This work is concerned with a new methodology that can be used to quantify the degree to which grains in the microstructure are aligned in the form of packets. The methodology is based on a crystallographic definition of the term packet which is used to deduce the theoretically ideal misorientations of intra-packet grain boundaries. A misorientation distribution obtained from extensive EBSD mapping can thus be split into intra- and inter-packet misorientations and the corresponding fractions can be determined by integration. The theoretical framework of the methodology is explained and a step-by-step description of the procedure is given. Results from a trace analysis are provided to justify the assumptions made regarding habit plane and examples are included showing how the grain boundary network can be split into two separate parts, one for lath boundaries and the other for packet boundaries. Moreover, example weld metal microstructures along with the corresponding misorientation distributions as well as quantitative values of the microstructures are presented.

Place, publisher, year, edition, pages
Elsevier, 2013. Vol. 45, no February, 45-54 p.
Keyword [en]
EBSD, misorientations, packets, weld metals, Work-integrated Learning, WIL
Keyword [sv]
AIL
National Category
Metallurgy and Metallic Materials
Research subject
ENGINEERING, Manufacturing and materials engineering; Work Integrated Learning
Identifiers
URN: urn:nbn:se:hv:diva-4888DOI: 10.1016/j.micron.2012.10.012ISI: 000314332700006Scopus ID: 2-s2.0-84872501023OAI: oai:DiVA.org:hv-4888DiVA: diva2:576873
Available from: 2012-12-14 Created: 2012-12-14 Last updated: 2016-02-10Bibliographically approved
In thesis
1. Quantitative Characterisation of packet Crystallography in high strength steel weld metals
Open this publication in new window or tab >>Quantitative Characterisation of packet Crystallography in high strength steel weld metals
2012 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Göteborg: Applied Physics, Chalmers University of Technology, 2012. 69 p.
Keyword
acicular ferrite, bainite, inclusions, EBSD, SEM, TEM, misorientation, high strength weld metals, microstructure, characterisation
National Category
Engineering and Technology
Research subject
ENGINEERING, Physics
Identifiers
urn:nbn:se:hv:diva-4862 (URN)
Presentation
2012-11-30, A820, Chalmers, Göteborg, 09:31 (English)
Opponent
Supervisors
Available from: 2012-12-21 Created: 2012-12-07 Last updated: 2015-10-02Bibliographically approved

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