On the Stress-Induced Formation of R-Phase in Ultra-Fine-Grained Ni-Rich NiTi Shape Memory Alloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F11%3A00376005" target="_blank" >RIV/68081723:_____/11:00376005 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11661-011-0679-y" target="_blank" >http://dx.doi.org/10.1007/s11661-011-0679-y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11661-011-0679-y" target="_blank" >10.1007/s11661-011-0679-y</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the Stress-Induced Formation of R-Phase in Ultra-Fine-Grained Ni-Rich NiTi Shape Memory Alloys

Popis výsledku v původním jazyce

Phase transformations in binary ultra-fine-grained (UFG) pseudoelastic NiTi wires were studied in a wide temperature range using mechanical loading/unloading experiments, resistance measurements, differential scanning calorimetry (DSC), thermal infraredimaging, and transmission electron microscopy (TEM). The formation of R-phase can be detected in the mechanical experiments. It is shown that the stress-strain response of the R-phase can be isolated from the overall stress-strain data. The R-phase always forms prior to B19´ when good pseudoelastic properties are observed. The stress-induced B2 to R-phase transition occurs in a homogeneous manner, contrary to the localized character of the B2/R to B19´ transformations. The temperature dependence of thecritical stress values for the formation of the martensitic phases shows a Clausius Clapeyron type of behavior with constants close to 6 MPa/K (B19´) and 18 MPa/K (R-phase). A stress-temperature map is suggested that summarizes the experi

Název v anglickém jazyce

On the Stress-Induced Formation of R-Phase in Ultra-Fine-Grained Ni-Rich NiTi Shape Memory Alloys

Popis výsledku anglicky

Phase transformations in binary ultra-fine-grained (UFG) pseudoelastic NiTi wires were studied in a wide temperature range using mechanical loading/unloading experiments, resistance measurements, differential scanning calorimetry (DSC), thermal infraredimaging, and transmission electron microscopy (TEM). The formation of R-phase can be detected in the mechanical experiments. It is shown that the stress-strain response of the R-phase can be isolated from the overall stress-strain data. The R-phase always forms prior to B19´ when good pseudoelastic properties are observed. The stress-induced B2 to R-phase transition occurs in a homogeneous manner, contrary to the localized character of the B2/R to B19´ transformations. The temperature dependence of thecritical stress values for the formation of the martensitic phases shows a Clausius Clapeyron type of behavior with constants close to 6 MPa/K (B19´) and 18 MPa/K (R-phase). A stress-temperature map is suggested that summarizes the experi

Druh

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

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GA106%2F09%2F1913" target="_blank" >GA106/09/1913: Martenzitické transformace ve slitinách NiTi</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Metallurgical and Materials Transactions A

ISSN

1073-5623

e-ISSN

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Svazek periodika

42A

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

19

Strana od-do

2556-2574

Kód UT WoS článku

000292936900006

EID výsledku v databázi Scopus

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