Nanocrystallization of NiTi shape memory alloys made amorphous by high-pressure torsion

Martin Peterlechner; Thomas Waitz; Hans-Peter Karnthaler

doi:10.1016/j.scriptamat.2008.05.004

Nanocrystallization of NiTi shape memory alloys made amorphous by high-pressure torsion

Martin Peterlechner (Corresponding author)
, Thomas Waitz
, Hans-Peter Karnthaler

Physics of Nanostructured Materials

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

Almost complete amorphization is obtained in NiTi subjected to high-pressure torsion (HPT). Nanocrystallization occurs more than 100 °C lower than in amorphous sputtered and melt spun NiTi. This is caused by medium-range-ordered debris surviving HPT and triggering nanocrystallization. A high nucleation rate and low growth rate result from in situ heating transmission electron microscopy experiments. The kinetics of the heterogeneous nanocrystallization differs significantly from that leading to coarse grains. Therefore, HPT allows the nanostructure to be tailored to enhance shape memory properties. © 2008 Acta Materialia Inc.

Original language	English
Pages (from-to)	566-569
Number of pages	4
Journal	Scripta Materialia
Volume	59
Issue number	5
DOIs	https://doi.org/10.1016/j.scriptamat.2008.05.004
Publication status	Published - 2008

Austrian Fields of Science 2012

103018 Materials physics

Access to Document

10.1016/j.scriptamat.2008.05.004

Cite this

@article{2f0d21b499054a9d9968c2d2bda7dae1,

title = "Nanocrystallization of NiTi shape memory alloys made amorphous by high-pressure torsion",

abstract = "Almost complete amorphization is obtained in NiTi subjected to high-pressure torsion (HPT). Nanocrystallization occurs more than 100 °C lower than in amorphous sputtered and melt spun NiTi. This is caused by medium-range-ordered debris surviving HPT and triggering nanocrystallization. A high nucleation rate and low growth rate result from in situ heating transmission electron microscopy experiments. The kinetics of the heterogeneous nanocrystallization differs significantly from that leading to coarse grains. Therefore, HPT allows the nanostructure to be tailored to enhance shape memory properties. {\textcopyright} 2008 Acta Materialia Inc.",

author = "Martin Peterlechner and Thomas Waitz and Hans-Peter Karnthaler",

note = "DOI: 10.1016/j.scriptamat.2008.05.004 ",

year = "2008",

doi = "10.1016/j.scriptamat.2008.05.004",

language = "English",

volume = "59",

pages = "566--569",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "PERGAMON-ELSEVIER SCIENCE LTD",

number = "5",

}

TY - JOUR

T1 - Nanocrystallization of NiTi shape memory alloys made amorphous by high-pressure torsion

AU - Peterlechner, Martin

AU - Waitz, Thomas

AU - Karnthaler, Hans-Peter

N1 - DOI: 10.1016/j.scriptamat.2008.05.004

PY - 2008

Y1 - 2008

N2 - Almost complete amorphization is obtained in NiTi subjected to high-pressure torsion (HPT). Nanocrystallization occurs more than 100 °C lower than in amorphous sputtered and melt spun NiTi. This is caused by medium-range-ordered debris surviving HPT and triggering nanocrystallization. A high nucleation rate and low growth rate result from in situ heating transmission electron microscopy experiments. The kinetics of the heterogeneous nanocrystallization differs significantly from that leading to coarse grains. Therefore, HPT allows the nanostructure to be tailored to enhance shape memory properties. © 2008 Acta Materialia Inc.

AB - Almost complete amorphization is obtained in NiTi subjected to high-pressure torsion (HPT). Nanocrystallization occurs more than 100 °C lower than in amorphous sputtered and melt spun NiTi. This is caused by medium-range-ordered debris surviving HPT and triggering nanocrystallization. A high nucleation rate and low growth rate result from in situ heating transmission electron microscopy experiments. The kinetics of the heterogeneous nanocrystallization differs significantly from that leading to coarse grains. Therefore, HPT allows the nanostructure to be tailored to enhance shape memory properties. © 2008 Acta Materialia Inc.

U2 - 10.1016/j.scriptamat.2008.05.004

DO - 10.1016/j.scriptamat.2008.05.004

M3 - Article

SN - 1359-6462

VL - 59

SP - 566

EP - 569

JO - Scripta Materialia

JF - Scripta Materialia

IS - 5

ER -

Nanocrystallization of NiTi shape memory alloys made amorphous by high-pressure torsion

Abstract

Austrian Fields of Science 2012

Access to Document

Fingerprint

Cite this