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

Result code in 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>

Alternative codes found

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

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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).

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/GA17-17016S" target="_blank" >GA17-17016S: Influence of defects on properties of bio-compatible high entropy alloys</a><br>

Continuities

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

Publication year

2019

Confidentiality

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

Name of the periodical

ENTROPY

ISSN

1099-4300

e-ISSN

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Volume of the periodical

21

Issue of the periodical within the volume

2

Country of publishing house

CH - SWITZERLAND

Number of pages

17

Pages from-to

1-17

UT code for WoS article

000460742200015

EID of the result in the Scopus database

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