Abstract
Mechanical alloying (MA) is a high-energy ball milling process results in the obtaining of simple and stable microstructures having increased homogeneity compared to other nonequilibrium synthesis methods. The aim of this paper was to develop a high entropy alloy with an improved hardness value suitable for coating turbine blades working in geothermal steam. CoCrFeNiMo high entropy alloy was processed in solid state, using mechanical alloying. After 40h milling time in a planetary ball mill the alloyed sample was consolidated using spark plasma sintering process. The samples obtained were investigated with the aid of optical and electron microscope, X ray diffraction and the hardness value was determined. The results obtained revealed that the powder was completely alloyed after 40 hour milling and the mixture between BCC and FCC phases resulted in 34% improved hardness value in comparison with a stainless steel usually used for turbine blades working in geothermal environment.
| Original language | English |
|---|---|
| Title of host publication | Materials Research and Application II - 6th RoMat |
| Editors | Ioana Csaki, Iulian Antoniac |
| Publisher | Trans Tech Publications Ltd |
| Pages | 15-19 |
| Number of pages | 5 |
| ISBN (Print) | 9783035712179 |
| DOIs | |
| Publication status | Published - 2017 |
| Event | 6th International Conference on Materials Science and Technologies, RoMat 2016 - Bucharest, Romania Duration: 9 Nov 2016 → 12 Nov 2016 |
Publication series
| Name | Key Engineering Materials |
|---|---|
| Volume | 750 KEM |
| ISSN (Print) | 1013-9826 |
| ISSN (Electronic) | 1662-9795 |
Conference
| Conference | 6th International Conference on Materials Science and Technologies, RoMat 2016 |
|---|---|
| Country/Territory | Romania |
| City | Bucharest |
| Period | 9/11/16 → 12/11/16 |
Bibliographical note
Publisher Copyright:© 2017 Trans Tech Publications, Switzerland.
Other keywords
- Hardness
- High entropy alloys
- Mechanical alloying
- Solid solution