Cold swaging and recrystallization annealling of Ti-Nb-Ta-Zr-O alloy - microstructure, texture and microhardness evolution

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F18%3AN0000221" target="_blank" >RIV/26316919:_____/18:N0000221 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.scientific.net/MSF.941.1132" target="_blank" >https://www.scientific.net/MSF.941.1132</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/MSF.941.1132" target="_blank" >10.4028/www.scientific.net/MSF.941.1132</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Cold swaging and recrystallization annealling of Ti-Nb-Ta-Zr-O alloy - microstructure, texture and microhardness evolution

Popis výsledku v původním jazyce

Metastable beta-Ti alloy Ti-35.3Nb-7.3Zr-5.7Ta-0.7O (wt. %) shows properties desirable for use as an implant material. However, very large grains (with the size of 0.5 - 3 mm) negatively affect the strength and fatigue resistance. Combination of cold-swaging and recrystallization annealing is used to refine the microstructure. Microstructure after cold swaging and after annealing is studied using scanning electron microscope by electron back-scatter diffraction measurements. Grain size and texture is determined and homogeneity of deformation inside the grains is discussed. Microhardness maps are measured in the cold-swaged samples. It is found that microhardness and thus also the deformation is higher in the center of each rod however the grains retain their original size. Annealing leads to recrystallization that is complete or nearly complete at the temperatures of 1000 degrees C and more. Annealing at 1000 degrees C for 15 min yields grain size of around 100 mu m. This grain size is believed to increase the fatigue performance to satisfactory values.

Název v anglickém jazyce

Cold swaging and recrystallization annealling of Ti-Nb-Ta-Zr-O alloy - microstructure, texture and microhardness evolution

Popis výsledku anglicky

Metastable beta-Ti alloy Ti-35.3Nb-7.3Zr-5.7Ta-0.7O (wt. %) shows properties desirable for use as an implant material. However, very large grains (with the size of 0.5 - 3 mm) negatively affect the strength and fatigue resistance. Combination of cold-swaging and recrystallization annealing is used to refine the microstructure. Microstructure after cold swaging and after annealing is studied using scanning electron microscope by electron back-scatter diffraction measurements. Grain size and texture is determined and homogeneity of deformation inside the grains is discussed. Microhardness maps are measured in the cold-swaged samples. It is found that microhardness and thus also the deformation is higher in the center of each rod however the grains retain their original size. Annealing leads to recrystallization that is complete or nearly complete at the temperatures of 1000 degrees C and more. Annealing at 1000 degrees C for 15 min yields grain size of around 100 mu m. This grain size is believed to increase the fatigue performance to satisfactory values.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/FV20147" target="_blank" >FV20147: Nová generace kloubních implantátů vyrobených z beta slitiny Ti</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

THERMEC 2018: 10TH INTERNATIONAL CONFERENCE ON PROCESSING AND MANUFACTURING OF ADVANCED MATERIALS

ISBN

978-3-0357-1208-7

ISSN

0255-5476

e-ISSN

—

Počet stran výsledku

5

Strana od-do

1132-1136

Název nakladatele

TRANS TECH PUBLICATIONS LTD

Místo vydání

Zurich

Místo konání akce

Paříž

Datum konání akce

9. 7. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000468152500185