Microstructure and Mechanical Properties of High-Entropy Alloy FeCoNiCr(X) Produced by Laser Directed Energy Deposition Process: Effect of Compositional Changes
High-entropy alloys (HEAs) have shown promise as materials with improved mechanical properties compared to traditional materials. Achieving the desired mechanical properties depends on the alloy composition, both in terms of percentage and elements. Laser directed energy deposition technology allows...
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2024-12-01
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| author | Ekaterina Kovalenko Igor Krasanov Ekaterina Valdaytseva Stanislav Stankevich Olga Klimova-Korsmik Marina Gushchina |
| author_facet | Ekaterina Kovalenko Igor Krasanov Ekaterina Valdaytseva Stanislav Stankevich Olga Klimova-Korsmik Marina Gushchina |
| author_sort | Ekaterina Kovalenko |
| collection | DOAJ |
| description | High-entropy alloys (HEAs) have shown promise as materials with improved mechanical properties compared to traditional materials. Achieving the desired mechanical properties depends on the alloy composition, both in terms of percentage and elements. Laser directed energy deposition technology allows for the production of products with various complex geometries and dimensions (L-DED). It has been found that HEA FeCoNiCrCu alloys can be divided into regions with high concentrations of Fe + Co + Cr and Cu elements. Dendrite growth directions of HEA FeCoNiCrCu are (111) and (200), and the average microhardness is around 240 HV. All samples have cracks vertically along the height. Fine-grained and dendrite structures were observed. Cu-element is mainly found in cracks. The HEA FeCoNiCrCu alloy was compared with another HEA FeCoCrMnNi, successfully obtained by the same L-DED technology. Comparing the two HEAs FeCoNiCrCu and FeCoCrMnNi obtained with the same deposition parameters can help determine the impact of one element on the phase composition, microstructure and mechanical properties of the high-entropy alloy. Replacing the element Mn with Cu in HEA FeCoNiCrMn led to a shift in the dendrite growth from one to two predominant directions and a decrease in the average microhardness by 20%. |
| format | Article |
| id | doaj-art-c6a9dd670147455e95ed91f5757a0ede |
| institution | Kabale University |
| issn | 2075-4701 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj-art-c6a9dd670147455e95ed91f5757a0ede2025-01-24T13:41:26ZengMDPI AGMetals2075-47012024-12-011512610.3390/met15010026Microstructure and Mechanical Properties of High-Entropy Alloy FeCoNiCr(X) Produced by Laser Directed Energy Deposition Process: Effect of Compositional ChangesEkaterina Kovalenko0Igor Krasanov1Ekaterina Valdaytseva2Stanislav Stankevich3Olga Klimova-Korsmik4Marina Gushchina5World-Class Research Center “Advanced Digital Technologies”, State Marine Technical University, 190121 Saint Petersburg, RussiaWorld-Class Research Center “Advanced Digital Technologies”, State Marine Technical University, 190121 Saint Petersburg, RussiaWorld-Class Research Center “Advanced Digital Technologies”, State Marine Technical University, 190121 Saint Petersburg, RussiaWorld-Class Research Center “Advanced Digital Technologies”, State Marine Technical University, 190121 Saint Petersburg, RussiaWorld-Class Research Center “Advanced Digital Technologies”, State Marine Technical University, 190121 Saint Petersburg, RussiaWorld-Class Research Center “Advanced Digital Technologies”, State Marine Technical University, 190121 Saint Petersburg, RussiaHigh-entropy alloys (HEAs) have shown promise as materials with improved mechanical properties compared to traditional materials. Achieving the desired mechanical properties depends on the alloy composition, both in terms of percentage and elements. Laser directed energy deposition technology allows for the production of products with various complex geometries and dimensions (L-DED). It has been found that HEA FeCoNiCrCu alloys can be divided into regions with high concentrations of Fe + Co + Cr and Cu elements. Dendrite growth directions of HEA FeCoNiCrCu are (111) and (200), and the average microhardness is around 240 HV. All samples have cracks vertically along the height. Fine-grained and dendrite structures were observed. Cu-element is mainly found in cracks. The HEA FeCoNiCrCu alloy was compared with another HEA FeCoCrMnNi, successfully obtained by the same L-DED technology. Comparing the two HEAs FeCoNiCrCu and FeCoCrMnNi obtained with the same deposition parameters can help determine the impact of one element on the phase composition, microstructure and mechanical properties of the high-entropy alloy. Replacing the element Mn with Cu in HEA FeCoNiCrMn led to a shift in the dendrite growth from one to two predominant directions and a decrease in the average microhardness by 20%.https://www.mdpi.com/2075-4701/15/1/26high-entropy alloysadditive technologieslaser directed energy depositionmicrostructuremechanical properties |
| spellingShingle | Ekaterina Kovalenko Igor Krasanov Ekaterina Valdaytseva Stanislav Stankevich Olga Klimova-Korsmik Marina Gushchina Microstructure and Mechanical Properties of High-Entropy Alloy FeCoNiCr(X) Produced by Laser Directed Energy Deposition Process: Effect of Compositional Changes Metals high-entropy alloys additive technologies laser directed energy deposition microstructure mechanical properties |
| title | Microstructure and Mechanical Properties of High-Entropy Alloy FeCoNiCr(X) Produced by Laser Directed Energy Deposition Process: Effect of Compositional Changes |
| title_full | Microstructure and Mechanical Properties of High-Entropy Alloy FeCoNiCr(X) Produced by Laser Directed Energy Deposition Process: Effect of Compositional Changes |
| title_fullStr | Microstructure and Mechanical Properties of High-Entropy Alloy FeCoNiCr(X) Produced by Laser Directed Energy Deposition Process: Effect of Compositional Changes |
| title_full_unstemmed | Microstructure and Mechanical Properties of High-Entropy Alloy FeCoNiCr(X) Produced by Laser Directed Energy Deposition Process: Effect of Compositional Changes |
| title_short | Microstructure and Mechanical Properties of High-Entropy Alloy FeCoNiCr(X) Produced by Laser Directed Energy Deposition Process: Effect of Compositional Changes |
| title_sort | microstructure and mechanical properties of high entropy alloy feconicr x produced by laser directed energy deposition process effect of compositional changes |
| topic | high-entropy alloys additive technologies laser directed energy deposition microstructure mechanical properties |
| url | https://www.mdpi.com/2075-4701/15/1/26 |
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