TEM analysis of deformation bands created by tensile deformation of superelastic NiTi wires

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00531993" target="_blank" >RIV/61389005:_____/20:00531993 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/20:00532824 RIV/00216208:11320/20:10421568 RIV/00216305:26620/20:PU140165

Result on the web

<a href="https://doi.org/10.1016/j.matchar.2020.110470" target="_blank" >https://doi.org/10.1016/j.matchar.2020.110470</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchar.2020.110470" target="_blank" >10.1016/j.matchar.2020.110470</a>

Result language

angličtina

Original language name

TEM analysis of deformation bands created by tensile deformation of superelastic NiTi wires

Original language description

Deformation processes derived from martensitic transformation in shape memory alloys are theoretically fully recoverable in a complete thermomechanical loading cycle across transformation range and do not leave any lattice defects in the microstructure. In reality, this is rarely the case in NiTi, since plastic deformation tends to accompany the martensitic transformation, particularly if it proceeds under large stress. Lattice defects observed in the microstructure of deformed NiTi wires (slip dislocations and deformation bands) attract the attention of researchers, since they are linked to unrecovered strains and play significant role in functional fatigue, shape setting or two-way shape memory effect. In this work, we present an experimental approach allowing for analysis of deformation bands in deformed NiTi consisting in: i) preparation of superelastic NiTi wires with recrystallized, small grained microstructure, ii) subjecting these wires to desired tensile test (e.g. superelastic or shape memory cycle) and iii) characterizing the deformation bands in TEM using selected area electron diffraction combined with dark field imaging following simple rules described in this work. If the deformed microstructure becomes too complex due to the high density and small size of deformation bands, ASTAR orientation mapping can be beneficially applied to reveal the refinement of the microstructure through the introduction of deformation bands.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Materials Characterization

ISSN

1044-5803

e-ISSN

—

Volume of the periodical

167

Issue of the periodical within the volume

SEP

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

110470

UT code for WoS article

000558805700053

EID of the result in the Scopus database

2-s2.0-85088048893