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Quantitative metallography for industrial use on martensitic steels
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
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2015 (English)In: PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, International Conference on Solid-Solid Phase Transformations in Inorganic Materials , 2015, 539-546 p.Conference paper (Refereed)Text
Abstract [en]

The performance of powertrain components and rock tools relies on the inherent strength and hardness of ferrous martensite. Currently the industry uses experimental measurements of surface hardness and case depth to qualify their hardening processes. Often there are additional requirements on microstructure constituents, although there are no quantitative methods available to characterize ferrous martensite. Here such methodology is discussed in relation to EBSD measurements on the full practical range of Fe-C alloys. The orientation relationships between austenite and martensite along with the variant pairing tendency of martensite are determined from the EBSD data. These results are related to the well-known morphological transition from lath to plate martensite in Fe-C alloys. Quantitative metallography using EBSD has the potential to complement hardness- and residual-stress measurements when qualifying new steel grades and hardening processes in industry. It may also prove important when investigating the coupling between material properties and fatigue performance.

Place, publisher, year, edition, pages
International Conference on Solid-Solid Phase Transformations in Inorganic Materials , 2015. 539-546 p.
Keyword [en]
Characterization, Martensite, Steel, Hardening, Hardness, Iron, Martensitic transformations, Metallography, Microstructure, Phase transitions, Stress measurement, Fatigue performance, Ferrous martensites, Hardening process, Morphological transitions, Orientation relationship, Powertrain components, Quantitative metallography, Quantitative method, Martensitic steel
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-187533ScopusID: 2-s2.0-84962646990ISBN: 9780692437360OAI: oai:DiVA.org:kth-187533DiVA: diva2:937642
Conference
International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015, 28 June 2015 through 3 July 2015
Note

QC 20160615

Available from: 2016-06-15 Created: 2016-05-25 Last updated: 2016-06-15Bibliographically approved

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Stormvinter, AlbinBorgenstam, Annika
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