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Microstructure versus substructure size effect
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-7527-719X
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-0101-0062
School of Mechanical & Aerospace Engineering, Nanyang Technological University.
Singapore Institute of Manufacturing Technology (SIMTech).
2016 (English)In: AIP Conference Proceedings / [ed] Francisco Chinesta, Elias Cueto and Emmanuelle Abisset-Chavanne, American Institute of Physics (AIP), 2016, Vol. 1769, 1-6 p., 090001Conference paper (Refereed)
Abstract [en]

In metal deformation, size effect is generally attributed to the interactive effect of grain size and specimen dimension. This work shows, however, that relative substructure dimensions should also be considered. Micro-compression tests on the micro-pins having different grain sizes revealed no significant size effect with respect to the mechanical behavior, even if the number of grains over the diameter of the micro-pins falls below its critical value. To justify the reason laying under this fact, a recovery annealing cycle was applied on the micro-pins to change the substructure properties without altering the mean grain size. A surprising drop in the flow stress of the recovery-annealed micro-pins implied the importance of considering subgrain size rather than grain size over the diameter of component for the size effect investigation.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2016. Vol. 1769, 1-6 p., 090001
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-32037DOI: 10.1063/1.4963491ISBN: 978-0-7354-1427-3OAI: oai:DiVA.org:hj-32037DiVA: diva2:1039421
Conference
ESAFORM 2016: Proceedings of the 19th international ESAFORM conference on material forming, Nantes, 27–29 April, 2016.
Available from: 2016-10-24 Created: 2016-10-24 Last updated: 2016-10-24Bibliographically approved

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