Effect of sintering temperature on the microstructure and properties of powder metallurgy Hf0.5Nb0.5Ta0.5Ti1.5Zr refractory high-entropy alloy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F19%3APU135823" target="_blank" >RIV/00216305:26210/19:PU135823 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Effect of sintering temperature on the microstructure and properties of powder metallurgy Hf0.5Nb0.5Ta0.5Ti1.5Zr refractory high-entropy alloy

Original language description

The present work is focused on the synthesis and mechanical properties evaluation of non-equiatomic Hf0.5Nb0.5Ta0.5Ti1.5Zr Refractory High-Entropy Alloy (RHEA). For the alloy production, a combination of mechanical alloying (MA) process in a planetary ball mill and hot pressing (HP) for powder densification was utilized. The effect of different sintering temperatures was explored in a temperature range of 1200 °C up to 1600 °C. The bulk material was then subject to investigation in terms of its microstructural features, elemental and phase composition and basic mechanical properties by scanning electron microscopy (SEM), X-ray diffraction (XRD), as well as hardness testing, density determination by Archimedes’ principle. The results show that very hard fine grained bulk materials were achieved in all microstructures, with an average hardness of (784 ± 5) HV0.2, (793 ± 3) HV0.2 and (814 ± 5) HV0.2 for the sintering temperatures of 1200 °C, 1300 °C and 1600 °C respectively. The slightly minimum increase in hardness might be attributed to the partial dissolution of a second-phase triggered by the increase in temperature.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

<a href="/en/project/GA19-22016S" target="_blank" >GA19-22016S: Dual phase alloys with extraordinary performance arising from nanotwinning</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

Article name in the collection

Metal 2019

ISBN

978-80-87294-92-5

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

1486-1491

Publisher name

Tanger Ltd.

Place of publication

Brno

Event location

Brno

Event date

May 22, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000539487400243