Napěťové, deformační a teplotní chování NiTi polykrystalů řízené B2-R-B19' transformací

Kód výsledku v IS VaVaI

RIV/61389005:_____/06:00076209 - isvavai.cz

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Stress-strain-temperature behavior due to B2-R-B19 ' transformation in NiTi polycrystals

Popis výsledku v původním jazyce

Thermomechanical behavior of superelastic NiTi wires undergoing sequential B2-R -B19' martensitic transformation was investigated by two recently developed in-situ experimental methods capable of detecting and recognizing the activity of various deformation/transformation processes in NiTi and theoretically by micromechanical modeling. An earlier model of SMA polycrystal transformation is further developed, so it accounts for the strains due to the R-phase related deformation processes in activated NiTi. A continuous variation of the rhombohedral distortion angle a of the R-phase structure with temperature and stress is newly introduced as a legitimate deformation mechanism. Simulation results for NiTi bars and wires exposed to three types of thermomechanical tests-mechanical loading at constant temperature, cooling under constant stress, and recovery stress tests are presented and confronted with results.

Název v anglickém jazyce

Stress-strain-temperature behavior due to B2-R-B19 ' transformation in NiTi polycrystals

Popis výsledku anglicky

Thermomechanical behavior of superelastic NiTi wires undergoing sequential B2-R -B19' martensitic transformation was investigated by two recently developed in-situ experimental methods capable of detecting and recognizing the activity of various deformation/transformation processes in NiTi and theoretically by micromechanical modeling. An earlier model of SMA polycrystal transformation is further developed, so it accounts for the strains due to the R-phase related deformation processes in activated NiTi. A continuous variation of the rhombohedral distortion angle a of the R-phase structure with temperature and stress is newly introduced as a legitimate deformation mechanism. Simulation results for NiTi bars and wires exposed to three types of thermomechanical tests-mechanical loading at constant temperature, cooling under constant stress, and recovery stress tests are presented and confronted with results.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název periodika

Journal of Engineering Materials and Technology-Transactions of the Asme

ISSN

0094-4289

e-ISSN

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Svazek periodika

128

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

268-278

Kód UT WoS článku

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EID výsledku v databázi Scopus

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