Size-dependent martensitic transformation path causing atomic-scale twinning of nanocrystalline NiTi shape memory alloys

Thomas Waitz; Daniel Spisak; Juergen Hafner; Hans-Peter Karnthaler

doi:10.1209/epl/i2005-10061-y

Size-dependent martensitic transformation path causing atomic-scale twinning of nanocrystalline NiTi shape memory alloys

Thomas Waitz, Daniel Spisak, Juergen Hafner, Hans-Peter Karnthaler

Computational Materials Physics

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

Nanocrystalline NiTi alloys were processed by devitrification of an amorphous phase to elucidate the impact of the nanocrystallinity on the thermally induced martensitic phase transformation. Forced by a size-dependent strain energy barrier, atomic-scale twinning leads to a unique path of the martensitic phase transformation. The observed twin boundaries of very low energy facilitate arrays of compound twins on atomic scale to overcome the strain energy barrier of the nanograins thus violating the hitherto well-established theory of martensite formation. Œ EDP Sciences.

Original language	English
Pages (from-to)	98-103
Number of pages	6
Journal	Europhysics Letters
Volume	71
Issue number	1
DOIs	https://doi.org/10.1209/epl/i2005-10061-y
Publication status	Published - 2005

Austrian Fields of Science 2012

103018 Materials physics

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10.1209/epl/i2005-10061-y

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title = "Size-dependent martensitic transformation path causing atomic-scale twinning of nanocrystalline NiTi shape memory alloys",

abstract = "Nanocrystalline NiTi alloys were processed by devitrification of an amorphous phase to elucidate the impact of the nanocrystallinity on the thermally induced martensitic phase transformation. Forced by a size-dependent strain energy barrier, atomic-scale twinning leads to a unique path of the martensitic phase transformation. The observed twin boundaries of very low energy facilitate arrays of compound twins on atomic scale to overcome the strain energy barrier of the nanograins thus violating the hitherto well-established theory of martensite formation. {\OE} EDP Sciences.",

author = "Thomas Waitz and Daniel Spisak and Juergen Hafner and Hans-Peter Karnthaler",

note = "DOI: 10.1209/epl/i2005-10061-y Affiliations: Institute of Materials Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria Adressen: Waitz, T.; Institute of Materials Physics; University of Vienna; Boltzmanngasse 5 A-1090 Vienna, Austria; email: [email protected] Import aus Scopus: 2-s2.0-21644459895 22.10.2007: Datenanforderung 1935 (Import Sachbearbeiter) 22.10.2007: Datenanforderung 1936 (Import Sachbearbeiter) 04.12.2007: Datenanforderung 2001 (Import Sachbearbeiter)",

year = "2005",

doi = "10.1209/epl/i2005-10061-y",

language = "English",

volume = "71",

pages = "98--103",

journal = "Europhysics Letters",

issn = "0295-5075",

publisher = "EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY",

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TY - JOUR

T1 - Size-dependent martensitic transformation path causing atomic-scale twinning of nanocrystalline NiTi shape memory alloys

AU - Waitz, Thomas

AU - Spisak, Daniel

AU - Hafner, Juergen

AU - Karnthaler, Hans-Peter

N1 - DOI: 10.1209/epl/i2005-10061-y Affiliations: Institute of Materials Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria Adressen: Waitz, T.; Institute of Materials Physics; University of Vienna; Boltzmanngasse 5 A-1090 Vienna, Austria; email: [email protected] Import aus Scopus: 2-s2.0-21644459895 22.10.2007: Datenanforderung 1935 (Import Sachbearbeiter) 22.10.2007: Datenanforderung 1936 (Import Sachbearbeiter) 04.12.2007: Datenanforderung 2001 (Import Sachbearbeiter)

PY - 2005

Y1 - 2005

N2 - Nanocrystalline NiTi alloys were processed by devitrification of an amorphous phase to elucidate the impact of the nanocrystallinity on the thermally induced martensitic phase transformation. Forced by a size-dependent strain energy barrier, atomic-scale twinning leads to a unique path of the martensitic phase transformation. The observed twin boundaries of very low energy facilitate arrays of compound twins on atomic scale to overcome the strain energy barrier of the nanograins thus violating the hitherto well-established theory of martensite formation. Œ EDP Sciences.

AB - Nanocrystalline NiTi alloys were processed by devitrification of an amorphous phase to elucidate the impact of the nanocrystallinity on the thermally induced martensitic phase transformation. Forced by a size-dependent strain energy barrier, atomic-scale twinning leads to a unique path of the martensitic phase transformation. The observed twin boundaries of very low energy facilitate arrays of compound twins on atomic scale to overcome the strain energy barrier of the nanograins thus violating the hitherto well-established theory of martensite formation. Œ EDP Sciences.

U2 - 10.1209/epl/i2005-10061-y

DO - 10.1209/epl/i2005-10061-y

M3 - Article

SN - 0295-5075

VL - 71

SP - 98

EP - 103

JO - Europhysics Letters

JF - Europhysics Letters

IS - 1

ER -

Size-dependent martensitic transformation path causing atomic-scale twinning of nanocrystalline NiTi shape memory alloys

Abstract

Austrian Fields of Science 2012

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