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Isothermal martensitic transformation under hydrostatic pressure in an Fe-Ni-C alloy at low temperatures
Umeå University, Faculty of Science and Technology, Physics.
1993 (English)In: Acta Metallurgica Et Materialia, ISSN 0956-7151, Vol. 41, no 8, 2283-2290 p.Article in journal (Refereed) Published
Abstract [en]

The isothermal martensitic tranformation under applied hydrostatic pressure has been investigated with an Fe-21.5Ni-0.95C alloy single crystal by electrical resistivity, magnetic susceptibility, X-ray diffraction and optical microscopy. The martensitic transformation starting temperature, M(s), is lowered by applied hydrostatic pressure. The isothermal martensitic transformation occurs first as a burst under a critical pressure and it is continued by further transformation with decreasing hydrostatic pressure The critical pressure under which the isothermal martensitic transformation starts changes curvilinearly with decreasing temperature. The morphology of the isothermal martensite formed under hydrostatic pressure is similar to that of athermal martensite. The temperature dependence of the critical pressure under which martensitic transformation starts has been calculated based on the homogeneous nucleation model and the heterogeneous nucleation model.

Place, publisher, year, edition, pages
Oxford: Elsevier Science Ltd , 1993. Vol. 41, no 8, 2283-2290 p.
Keyword [en]
Steel, martensitic transition, high pressure
National Category
Materials Engineering
Research subject
Materials Science
Identifiers
URN: urn:nbn:se:umu:diva-26550OAI: oai:DiVA.org:umu-26550DiVA: diva2:272097
Available from: 2009-10-14 Created: 2009-10-14 Last updated: 2010-01-25

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