Tension/compression asymmetry of functional properties in [001]-oriented ferromagnetic NiFeGaCo single crystals Academic Article

abstract

• In the present study the effects of stress state (tension/compression) and test temperature on the critical stress level for the stress-induced martensitic transformation, the shape memory effect and superelasticity of [001]-oriented Ni49Fe18Ga27Co6 (at.%) single crystals were investigated. It is shown that the strong tension/compression asymmetry of the critical stress levels for the stress-induced martensitic transformation can be described by a modified Clausius-Clapreyron relationship, which takes the difference between the elastic moduli of austenite and martensite into account. The temperature interval in which superelasticity occurs and the reversible strain values associated with superelasticity and the shape memory effect are both strongly dependent on the stress state (tension/compression). Moreover, the conditions necessary for the development of high-temperature superelasticity in Ni49Fe18Ga 27Co6 single crystals have been determined. For the Ni49Fe18Ga27Co6 single crystals a large interval of superelasticity (315 K < T < 723 K) was obtained when the single crystals were loaded in tension along the [001]-orientation. 2010 Elsevier Ltd. All rights reserved.

authors

• Karaman, Ibrahim

published proceedings

• INTERMETALLICS

author list (cited authors)

• Panchenko, E., Chumlyakov, Y., Maier, H. J., Timofeeva, E., & Karaman, I.

citation count

• 52

complete list of authors

• Panchenko, E||Chumlyakov, Y||Maier, HJ||Timofeeva, E||Karaman, I

publication date

• December 2010

publisher

• Elsevier  Publisher

published in

• Intermetallics  Journal

keywords

• Magnetic Intermetallics
• Martensitic Transformations
• Microstructure
• Shape Memory Effect

Digital Object Identifier (DOI)

• 10.1016/j.intermet.2010.09.009

start page

• 2458

end page

• 2463

volume

• 18

issue

• 12

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.intermet.2010.09.009