About: Conventional and in-situ transmission electron microscopy investigations into multistage martensitic transformations in Ni-rich NiTi shape memory alloys

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Investigations of multi-step martensitic transformations in Ni-rich NiTi single crystals and polycrystals are reported. Attention is mainly given to processes that involve a two-step RB19 transition. Single crystals and polycrystals with a Ni content close to 51 at.% were subjected to standard heat-treatments during which microstructures with a homogeneous distribution of Ni4Ti3 precipitates form. Results obtained using differential scanning calorimetry and conventional and in-situ transmission electron microscopy clearly show that these microstructures transform from R phase into B19 martensite in two steps. We suggest that the nucleation conditions for the B19 phase must be taken into account to rationalize the obtained results. Investigations of multi-step martensitic transformations in Ni-rich NiTi single crystals and polycrystals are reported. Attention is mainly given to processes that involve a two-step RB19 transition. Single crystals and polycrystals with a Ni content close to 51 at.% were subjected to standard heat-treatments during which microstructures with a homogeneous distribution of Ni4Ti3 precipitates form. Results obtained using differential scanning calorimetry and conventional and in-situ transmission electron microscopy clearly show that these microstructures transform from R phase into B19 martensite in two steps. We suggest that the nucleation conditions for the B19 phase must be taken into account to rationalize the obtained results. (en) Je prezentována analýza vícekrokových martenzitických transformací v Ni-bohatých slitinách NiTi s tvarovou pamětí. Pozornost je zaměřena zejména na procesy, které vedou k dvoukrokové transformaci mezi fázemi R a B19’. Monokrystaly a polykrystaly s obsahem Ni blízkým 51at% byly podrobeny standardnímu tepelnému zpracování, které vedlo k homogenní precipitaci fáze Ni4Ti3. Výsledky dosažené metodami diferenciální skenovací kalorimetrie a konvenční a in-situ elektronové mikroskopie prokázaly, že tyto mikrostruktury transformují mezi fázemi R a B19’ ve dvou krocích. Vysvětlení vícekrokové dráhy martenzitické transformaci v těchto případech vyžaduje rozbor podmínek nukleace fáze B19’ na hranicích zrn fáze R. (cs)
Title	Conventional and in-situ transmission electron microscopy investigations into multistage martensitic transformations in Ni-rich NiTi shape memory alloys Konvenční a in-situ transmisní elektronová mikroskopie Ni-bohatých slitin NiTi s tvarovou pamětí vykazujících vícekrokovou dráhu martenzitické transformace (cs) Conventional and in-situ transmission electron microscopy investigations into multistage martensitic transformations in Ni-rich NiTi shape memory alloys (en)
skos:prefLabel	Conventional and in-situ transmission electron microscopy investigations into multistage martensitic transformations in Ni-rich NiTi shape memory alloys Konvenční a in-situ transmisní elektronová mikroskopie Ni-bohatých slitin NiTi s tvarovou pamětí vykazujících vícekrokovou dráhu martenzitické transformace (cs) Conventional and in-situ transmission electron microscopy investigations into multistage martensitic transformations in Ni-rich NiTi shape memory alloys (en)
skos:notation	RIV/68081723:_____/08:00324692!RIV09-AV0-68081723
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA106/05/0918), Z(AV0Z20410507)
http://linked.open...iv/cisloPeriodika	Sp.Iss.
http://linked.open...vai/riv/dodaniDat	2009
http://linked.open...aciTvurceVysledku	Bojda, Ondřej Dlouhý, Antonín
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	361288
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/08:00324692
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	NiTi shape memory alloys; Ni4Ti3 precipitates; Multi-step martensitic transformations (en)
http://linked.open.../riv/klicoveSlovo	NiTi shape memory alloys Multi-step martensitic transformations Ni4Ti3 precipitates
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[266608E21A71]
http://linked.open...i/riv/nazevZdroje	Materials Science and Engineering A-Structural materials
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	NiTi Shape Memory Alloys and Their Processing-Structure-Transformation Behaviour Relationship
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	481
http://linked.open...iv/tvurceVysledku	Dlouhý, Antonín Somsen, Ch. Eggeler, G. Bojda, Ondřej
http://linked.open...ain/vavai/riv/wos	000255716100085
http://linked.open...n/vavai/riv/zamer	Physical properties of advanced materials in relation to their microstructure and processing
issn	0921-5093
number of pages	5 (xsd:int)

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