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Unified thermodynamic analysis of the stress-assisted γ→ε martensitic transformation in Fe–Mn–Si alloys
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Materials Science and Engineering.ORCID iD: 0000-0002-4521-6089
1998 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 46, no 11, 3883-3891 p.Article in journal (Refereed) Published
Abstract [en]

A unified thermodynamic analysis has been developed which allows the combined complex effects of applied stresses and alloy composition on the martensite start temperature, Ms(σ), to be explained and predicted. In this unified analysis, a thermodynamic analysis of the effect of applied stress on the relative stability of the high and low temperature phase is combined with existing thermodynamic descriptions of the alloy system. The calculated results are compared with experimental results for the γ martensitic transformation in Fe–Mn–Si shape memory alloys. For single crystals, the comparison shows that the influence of applied stresses can be directly predicted with a reasonable accuracy for a wide composition range. By integrating a polycrystallinity parameter in the analysis it is shown that the calculations are also valid for polycrystalline alloys. Application of this analysis to experimental values of Ms(σ) can also generate useful data for future optimizations of the thermodynamic description of several alloy systems.

Place, publisher, year, edition, pages
1998. Vol. 46, no 11, 3883-3891 p.
Keyword [en]
memory, mechanism, behavior
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-12387DOI: 10.1016/S1359-6454(98)00056-1ISI: 000075149000021OAI: oai:DiVA.org:kth-12387DiVA: diva2:310624
Note
QC 20100415Available from: 2010-04-15 Created: 2010-04-15 Last updated: 2017-12-12Bibliographically 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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