Microstructure and Room Temperature Mechanical Properties of Different 3 and 4 Element Medium Entropy Alloys from HfNbTaTiZr System

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193247%3A_____%2F19%3AN0000001" target="_blank" >RIV/60193247:_____/19:N0000001 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389021:_____/19:00509918 RIV/00216208:11320/19:10404077

Výsledek na webu

<a href="https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=2ahUKEwiSytCx_q7hAhXk2eAKHaLcB50QFjABegQIBBAC&url=https%3A%2F%2Fwww.mdpi.com%2F1099-4300%2F21%2F2%2F114%2Fpdf&usg=AOvVaw1cDqHcYD9y5vg7nPx-Txmr" target="_blank" >https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=2ahUKEwiSytCx_q7hAhXk2eAKHaLcB50QFjABegQIBBAC&url=https%3A%2F%2Fwww.mdpi.com%2F1099-4300%2F21%2F2%2F114%2Fpdf&usg=AOvVaw1cDqHcYD9y5vg7nPx-Txmr</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/e21020114" target="_blank" >10.3390/e21020114</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure and Room Temperature Mechanical Properties of Different 3 and 4 Element Medium Entropy Alloys from HfNbTaTiZr System

Popis výsledku v původním jazyce

Refractory high entropy alloys (HEA) are promising materials for high temperature applications. This work presents investigations of the room temperature tensile mechanical properties of selected 3 and 4 elements medium entropy alloys (MEA) derived from the HfNbTaTiZr system. Tensile testing was combined with fractographic and microstructure analysis, using scanning electron microscope (SEM), wavelength dispersive spectroscope (WDS) and X-Ray powder diffraction (XRD). The 5 element HEA alloy HfNbTaTiZr exhibits the best combination of strength and elongation while 4 and 3 element MEAs have lower strength. Some of them are ductile, some of them brittle, depending on microstructure. Simultaneous presence of Ta and Zr in the alloy resulted in a significant reduction of ductility caused by reduction of the BCC phase content. Precipitation of Ta rich particles on grain boundaries reduces further the maximum elongation to failure down to zero values.powders and subsequent sintering) with the primary aim of using it as a material for bio-applications. Sintered specimens were swaged and subsequently the influence of annealing temperature on the mechanical and structural properties was studied. Specimens were annealed at 800, 850, 900, 950, and 1000 °C for 0.5 h and water quenched. Significant changes in microstructure (i.e. precipitate dissolution or grain coarsening) were observed in relation to increasing annealing temperature. In correlation with those changes, the mechanical properties were also studied. The ultimate tensile strength increased from 925 MPa (specimen annealed at 800 °C) to 990 MPa (900 °C). Also the elongation increased from ~ 13% (800 °C) to more than 20% (900, 950, and 1000 °C).

Název v anglickém jazyce

Microstructure and Room Temperature Mechanical Properties of Different 3 and 4 Element Medium Entropy Alloys from HfNbTaTiZr System

Popis výsledku anglicky

Refractory high entropy alloys (HEA) are promising materials for high temperature applications. This work presents investigations of the room temperature tensile mechanical properties of selected 3 and 4 elements medium entropy alloys (MEA) derived from the HfNbTaTiZr system. Tensile testing was combined with fractographic and microstructure analysis, using scanning electron microscope (SEM), wavelength dispersive spectroscope (WDS) and X-Ray powder diffraction (XRD). The 5 element HEA alloy HfNbTaTiZr exhibits the best combination of strength and elongation while 4 and 3 element MEAs have lower strength. Some of them are ductile, some of them brittle, depending on microstructure. Simultaneous presence of Ta and Zr in the alloy resulted in a significant reduction of ductility caused by reduction of the BCC phase content. Precipitation of Ta rich particles on grain boundaries reduces further the maximum elongation to failure down to zero values.powders and subsequent sintering) with the primary aim of using it as a material for bio-applications. Sintered specimens were swaged and subsequently the influence of annealing temperature on the mechanical and structural properties was studied. Specimens were annealed at 800, 850, 900, 950, and 1000 °C for 0.5 h and water quenched. Significant changes in microstructure (i.e. precipitate dissolution or grain coarsening) were observed in relation to increasing annealing temperature. In correlation with those changes, the mechanical properties were also studied. The ultimate tensile strength increased from 925 MPa (specimen annealed at 800 °C) to 990 MPa (900 °C). Also the elongation increased from ~ 13% (800 °C) to more than 20% (900, 950, and 1000 °C).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA17-17016S" target="_blank" >GA17-17016S: Vliv defektů na vlastnosti biokompatibilních slitin s vysokou entropií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

ENTROPY

ISSN

1099-4300

e-ISSN

—

Svazek periodika

21

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

17

Strana od-do

1-17

Kód UT WoS článku

000460742200015

EID výsledku v databázi Scopus

—