Phase transformations of severely plastically deformed Ti-Ni-Pd high-temperature shape memory alloys

Semir Tulic; Michael Kerber; Mitsuhiro Matsuda; Thomas Waitz

doi:10.1142/S1793604717400124

Phase transformations of severely plastically deformed Ti-Ni-Pd high-temperature shape memory alloys

Semir Tulic
, Michael Kerber
, Mitsuhiro Matsuda
, Thomas Waitz (Corresponding author)

Physics of Nanostructured Materials

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

Severe plastic deformation of a Ti50Ni25Pd25 high-temperature shape memory alloy yields a nanoscale mixture of an amorphous phase and retained lamellae of the parent B19 martensite. The thermal stability of the deformed martensite is significantly enhanced. Upon heating, B2 austenite occurs within the martensite and by crystallization of the amorphous phase, concomitant with recovery and the formation of an ultrafine grained structure. In the small grains, the B2 austenite to B19 martensitic transformation is shifted to lower temperatures and incomplete.

Original language	English
Article number	1740012
Number of pages	8
Journal	Functional Materials Letters
Volume	10
Issue number	1
DOIs	https://doi.org/10.1142/S1793604717400124
Publication status	Published - Feb 2017

Funding

Financial support by the Austrian Federal Government (in particular from Bundesministerium fur Verkehr, Innovation und Technologie and Bundesministerium fur Wissenschaft, Forschung und Wirtschaft) represented by Osterreichische Forschungsforderungsgesellschaft mbH and the Styrian and the Tyrolean Provincial Government, represented by Steirische Wirtschaftsforderungsgesellschaft mbH and Standortagentur Tirol, within the framework of the COMET Funding Programme is gratefully acknowledged.

Austrian Fields of Science 2012

103018 Materials physics

Keywords

Phase transformation
severe plastic deformation
martensite stabilization
ultrafine grains
HIGH-PRESSURE TORSION
MECHANICAL-PROPERTIES
CYCLIC REVERSIBILITY
TWIN BOUNDARIES
DEFORMATION
STABILIZATION
AMORPHIZATION
MARTENSITE
MICROSTRUCTURE
REFINEMENT

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10.1142/S1793604717400124

Cite this

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title = "Phase transformations of severely plastically deformed Ti-Ni-Pd high-temperature shape memory alloys",

abstract = "Severe plastic deformation of a Ti50Ni25Pd25 high-temperature shape memory alloy yields a nanoscale mixture of an amorphous phase and retained lamellae of the parent B19 martensite. The thermal stability of the deformed martensite is significantly enhanced. Upon heating, B2 austenite occurs within the martensite and by crystallization of the amorphous phase, concomitant with recovery and the formation of an ultrafine grained structure. In the small grains, the B2 austenite to B19 martensitic transformation is shifted to lower temperatures and incomplete.",

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author = "Semir Tulic and Michael Kerber and Mitsuhiro Matsuda and Thomas Waitz",

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AU - Tulic, Semir

AU - Kerber, Michael

AU - Matsuda, Mitsuhiro

AU - Waitz, Thomas

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N2 - Severe plastic deformation of a Ti50Ni25Pd25 high-temperature shape memory alloy yields a nanoscale mixture of an amorphous phase and retained lamellae of the parent B19 martensite. The thermal stability of the deformed martensite is significantly enhanced. Upon heating, B2 austenite occurs within the martensite and by crystallization of the amorphous phase, concomitant with recovery and the formation of an ultrafine grained structure. In the small grains, the B2 austenite to B19 martensitic transformation is shifted to lower temperatures and incomplete.

AB - Severe plastic deformation of a Ti50Ni25Pd25 high-temperature shape memory alloy yields a nanoscale mixture of an amorphous phase and retained lamellae of the parent B19 martensite. The thermal stability of the deformed martensite is significantly enhanced. Upon heating, B2 austenite occurs within the martensite and by crystallization of the amorphous phase, concomitant with recovery and the formation of an ultrafine grained structure. In the small grains, the B2 austenite to B19 martensitic transformation is shifted to lower temperatures and incomplete.

KW - Phase transformation

KW - severe plastic deformation

KW - martensite stabilization

KW - ultrafine grains

KW - HIGH-PRESSURE TORSION

KW - MECHANICAL-PROPERTIES

KW - CYCLIC REVERSIBILITY

KW - TWIN BOUNDARIES

KW - DEFORMATION

KW - STABILIZATION

KW - AMORPHIZATION

KW - MARTENSITE

KW - MICROSTRUCTURE

KW - REFINEMENT

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DO - 10.1142/S1793604717400124

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VL - 10

JO - Functional Materials Letters

JF - Functional Materials Letters

IS - 1

M1 - 1740012

ER -

Phase transformations of severely plastically deformed Ti-Ni-Pd high-temperature shape memory alloys

Abstract

Funding

Austrian Fields of Science 2012

Keywords

Access to Document

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