Ultra-fine grained microstructure of metastable beta Ti-15Mo alloy and its effects on the phase transformations
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10370652" target="_blank" >RIV/00216208:11320/17:10370652 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1088/1757-899X/194/1/012021" target="_blank" >http://dx.doi.org/10.1088/1757-899X/194/1/012021</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1757-899X/194/1/012021" target="_blank" >10.1088/1757-899X/194/1/012021</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Ultra-fine grained microstructure of metastable beta Ti-15Mo alloy and its effects on the phase transformations
Popis výsledku v původním jazyce
Processing of metastable titanium alloys by severe plastic deformation provides an opportunity to achieve exceptional grain refinement, to enhance the strength and to affect phase transformations occurring during thermal treatment. The main aim of this study is to investigate the microstructure of ultra-fine grained (UFG) material and effect of microstructural changes on phase transformations in metastable beta-Ti alloy Ti-15Mo. Metastable beta-Ti alloys are currently the most studied Ti-based materials with prospective use in medicine. Ti-15Mo alloy after solution treatment contains metastable beta-phase. Metastable omega-phase and stable alpha-phase particles are formed upon annealing,. Solution treated Ti-15Mo alloy was deformed by high pressure torsion (HPT) at room temperature. Severely deformed structure after HPT with grain size of similar to 200 nm was studied by transmission electron microscopy. In-situ electrical resistance measurements showed significant changes in undergoing phase transformations when compared to coarse-grained (CG) material. Scanning electron microscopy revealed heterogeneous precipitation of alpha-particles at grain boundaries (GB). Due to the high density of GBs in UFG structure, these precipitates are very fine and equiaxed. The study demonstrates that SPD is capable of enhancing mechanical properties due to grain refinement and via affecting precipitation processes in metastable beta-Ti alloys.
Název v anglickém jazyce
Ultra-fine grained microstructure of metastable beta Ti-15Mo alloy and its effects on the phase transformations
Popis výsledku anglicky
Processing of metastable titanium alloys by severe plastic deformation provides an opportunity to achieve exceptional grain refinement, to enhance the strength and to affect phase transformations occurring during thermal treatment. The main aim of this study is to investigate the microstructure of ultra-fine grained (UFG) material and effect of microstructural changes on phase transformations in metastable beta-Ti alloy Ti-15Mo. Metastable beta-Ti alloys are currently the most studied Ti-based materials with prospective use in medicine. Ti-15Mo alloy after solution treatment contains metastable beta-phase. Metastable omega-phase and stable alpha-phase particles are formed upon annealing,. Solution treated Ti-15Mo alloy was deformed by high pressure torsion (HPT) at room temperature. Severely deformed structure after HPT with grain size of similar to 200 nm was studied by transmission electron microscopy. In-situ electrical resistance measurements showed significant changes in undergoing phase transformations when compared to coarse-grained (CG) material. Scanning electron microscopy revealed heterogeneous precipitation of alpha-particles at grain boundaries (GB). Due to the high density of GBs in UFG structure, these precipitates are very fine and equiaxed. The study demonstrates that SPD is capable of enhancing mechanical properties due to grain refinement and via affecting precipitation processes in metastable beta-Ti alloys.
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
—
OECD FORD obor
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Návaznosti výsledku
Projekt
<a href="/cs/project/GJ17-20700Y" target="_blank" >GJ17-20700Y: Struktura defektů a fázové transformace v jemnozrnných biokompatibilních slitinách titanu</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2017
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
7TH INTERNATIONAL CONFERENCE ON NANOMATERIALS BY SEVERE PLASTIC DEFORMATION
ISBN
—
ISSN
1757-8981
e-ISSN
neuvedeno
Počet stran výsledku
6
Strana od-do
—
Název nakladatele
IOP PUBLISHING LTD
Místo vydání
BRISTOL
Místo konání akce
Sydney
Datum konání akce
2. 7. 2017
Typ akce podle státní příslušnosti
WRD - Celosvětová akce
Kód UT WoS článku
000411380900021