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Effects of recrystallization and grain size on the martensitic transformation in Fe-31% Mn-5% Si alloy
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Materials Science and Engineering.ORCID iD: 0000-0002-4521-6089
1996 (English)In: Materials transactions, JIM, ISSN 0916-1821, Vol. 37, no 7, 1363-1370 p.Article in journal (Refereed) Published
Abstract [en]

The effects of recrystallization and grain size have been studied in an Fe-31%Mn-5%Si shape memory alloy. The amount of martensite formed in samples which have been hot rolled at 1373 K and subsequently homogenized for 24 h at 1273 K followed by a final 30 min anneal at 1323 K is twice as large as in samples which have been hot rolled and homogenized in the same way as the former followed by a compression and a subsequent recrystallization at 1323 K for 30 min. The only difference between the samples is the plastic deformation induced by the compression. We thus conclude that some effect of the compressive deformation remains despite the recrystallization and suppresses the subsequent martensite formation. However, we have not yet been able to identify this effect. This matter will be subject to further investigations.

No significant change is found in the M(S) and A(S) temperatures for the gamma <----> epsilon transformations determined by DSC. When the grain size varies between 40 and 160 mu m in completely recrystallized samples the variation in transformation temperatures is small, less than 10 K.

Place, publisher, year, edition, pages
1996. Vol. 37, no 7, 1363-1370 p.
Keyword [en]
iron-manganese-silicon alloy; martensite; recrystallization; grain size; shape memory alloy
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-12385ISI: A1996VC63700004OAI: oai:DiVA.org:kth-12385DiVA: diva2:310617
Note
QC 20100415Available from: 2010-04-15 Created: 2010-04-15 Last updated: 2011-12-07Bibliographically approved
In thesis
1. Thermal and stress induced gamma to epsilon martensitic transformations in Fe-Mn-Si shape memory alloys
Open this publication in new window or tab >>Thermal and stress induced gamma to epsilon martensitic transformations in Fe-Mn-Si shape memory alloys
1997 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 1997. 20 p.
Series
TRITA
Keyword
Fe, Mn, Si, Epsilon martensite, Transformation temperatures, Enthalphy, Stress induced, Magnetic transformation, Néel temperature, Shape memory
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-2573 (URN)91-7170-194-X (ISBN)
Public defence
1997-11-07, 00:00 (English)
Note
QC 20100409 NR 20140805Available from: 2000-01-01 Created: 2000-01-01 Last updated: 2011-12-07Bibliographically approved

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