Publication detail
Preparation of AlCoCrFeNiTi0.5 High Entropy Alloy by SPS from Mechanically Alloyed Powders
MORAVČÍK, I. ČÍŽEK, J. HRYHA,E. DLOUHÝ, I.
Czech title
Příprava AlCoCrFeNiTi0.5 High Entropy slitiny SPS z mechanicky legovaných Powders
English title
Preparation of AlCoCrFeNiTi0.5 High Entropy Alloy by SPS from Mechanically Alloyed Powders
Type
conference paper
Language
en
Original abstract
High entropy alloys are newly developed class of materials with excellent properties and promising application potential. The present work reports synthesis of inequiatomic alloy AlCoCrFeNiTi0.5 prepared by mechanical alloying (MA) in planetary ball mill followed by spark plasma sintering (SPS). Alloying behaviour, microstructure, basic mechanical properties and thermal behaviour of the alloy were investigated by means of XRD, SEM and DSC analyses and microhardness testing. It was found that the MA process parameters significantly influence homogeneity and size of the obtained alloyed powders. During MA, Cr-based supersaturated solid solution with body-centered cubic (BCC) structure was formed. After SPS at 1000°C the fine grained microstructure consisted of BCC solid solution and ordered FCC phase. Low levels of retained porosity were observed. The alloy exhibited a high hardness of 762HV.
Czech abstract
Vysoká entropické slitiny jsou nově vyvinuté třídu materiálů s vynikajícími vlastnostmi a slibnou aplikačním potenciálem. V práci bola syntetizovaná AlCoCrFeNiTi0.5 slitina připravená mechanickým legováním (MA) v planetárním kulovém mlýnu a následně jiskra plazmovou sintrováním (SPS).
English abstract
High entropy alloys are newly developed class of materials with excellent properties and promising application potential. The present work reports synthesis of inequiatomic alloy AlCoCrFeNiTi0.5 prepared by mechanical alloying (MA) in planetary ball mill followed by spark plasma sintering (SPS). Alloying behaviour, microstructure, basic mechanical properties and thermal behaviour of the alloy were investigated by means of XRD, SEM and DSC analyses and microhardness testing. It was found that the MA process parameters significantly influence homogeneity and size of the obtained alloyed powders. During MA, Cr-based supersaturated solid solution with body-centered cubic (BCC) structure was formed. After SPS at 1000°C the fine grained microstructure consisted of BCC solid solution and ordered FCC phase. Low levels of retained porosity were observed. The alloy exhibited a high hardness of 762HV.
Keywords in English
powder metallurgy, alloying, entropy
RIV year
2015
Released
04.10.2015
Publisher
European powder metallurgy association
Location
Reims France
ISBN
978-1-899072-47-7
Book
EURO PM 2015 Proceedings
Pages from–to
1–6
Pages count
500
BIBTEX
@inproceedings{BUT120004,
author="Igor {Moravčík} and Jan {Čížek} and Ivo {Dlouhý},
title="Preparation of AlCoCrFeNiTi0.5 High Entropy Alloy by SPS from Mechanically Alloyed Powders",
booktitle="EURO PM 2015 Proceedings",
year="2015",
month="October",
pages="1--6",
publisher="European powder metallurgy association",
address="Reims France",
isbn="978-1-899072-47-7"
}