AlCoCrFeNiTi-C alloy with TiC nano precipitates processed through mechanical alloying and spark plasma sintering
•Supersaturated solution of NiAl B2 phase and CrFe phase with nano TiC precipitates.•Enhanced compressive strength due to Orowan strengthening.•In-situ reactions favouring TiC formation rather than other carbide formations.•Phase stability at 800 °C and 1000 °C. AlCoCrFeNiTi-C High Entropy Alloy (HE...
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| Published in: | Materials letters Vol. 285; p. 129185 |
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| Format: | Journal Article |
| Language: | English |
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Elsevier B.V
15-02-2021
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| Abstract | •Supersaturated solution of NiAl B2 phase and CrFe phase with nano TiC precipitates.•Enhanced compressive strength due to Orowan strengthening.•In-situ reactions favouring TiC formation rather than other carbide formations.•Phase stability at 800 °C and 1000 °C.
AlCoCrFeNiTi-C High Entropy Alloy (HEA) develops a single BCC phase after 10 h of milling. Sintering at 1000 °C promotes the formation of NiAl rich B2, CrFe disordered BCC and TiC phases making the alloy a dual phase structure with TiC precipitates. Alloy also exhibits a good room temperature compressive strength of 2503 ± 8 MPa and hardness of 910 ± HV0.5 which can be attributed to the presence of nano sized TiC. |
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| AbstractList | AlCoCrFeNiTi-C High Entropy Alloy (HEA) develops a single BCC phase after 10 h of milling. Sintering at 1000 °C promotes the formation of NiAl rich B2, CrFe disordered BCC and TiC phases making the alloy a dual phase structure with TiC precipitates. Alloy also exhibits a good room temperature compressive strength of 2503 ± 8 MPa and hardness of 910 ± HV0.5 which can be attributed to the presence of nano sized TiC. •Supersaturated solution of NiAl B2 phase and CrFe phase with nano TiC precipitates.•Enhanced compressive strength due to Orowan strengthening.•In-situ reactions favouring TiC formation rather than other carbide formations.•Phase stability at 800 °C and 1000 °C. AlCoCrFeNiTi-C High Entropy Alloy (HEA) develops a single BCC phase after 10 h of milling. Sintering at 1000 °C promotes the formation of NiAl rich B2, CrFe disordered BCC and TiC phases making the alloy a dual phase structure with TiC precipitates. Alloy also exhibits a good room temperature compressive strength of 2503 ± 8 MPa and hardness of 910 ± HV0.5 which can be attributed to the presence of nano sized TiC. |
| ArticleNumber | 129185 |
| Author | Nair, Akash Hemanth Kumar, Anand Anil Sudhees, Akshai Krishnan, Jagath Sekhar, R. Anand Shifin, S. |
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| CitedBy_id | crossref_primary_10_3390_met13050929 crossref_primary_10_1007_s44210_024_00038_y crossref_primary_10_1016_j_matchemphys_2022_125908 crossref_primary_10_2339_politeknik_1078287 crossref_primary_10_1016_j_surfcoat_2021_127233 crossref_primary_10_1002_adem_202400516 |
| Cites_doi | 10.4028/www.scientific.net/MSF.745-746.768 10.1002/adem.200300567 10.1016/j.pnsc.2014.10.007 10.1016/j.actamat.2016.09.003 10.1016/j.matchemphys.2017.10.040 10.1016/j.msea.2015.08.056 10.1016/j.jallcom.2017.03.216 10.1007/s11665-018-3300-3 |
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| Snippet | •Supersaturated solution of NiAl B2 phase and CrFe phase with nano TiC precipitates.•Enhanced compressive strength due to Orowan strengthening.•In-situ... AlCoCrFeNiTi-C High Entropy Alloy (HEA) develops a single BCC phase after 10 h of milling. Sintering at 1000 °C promotes the formation of NiAl rich B2, CrFe... |
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| SubjectTerms | Chemical precipitation Compressive strength HEA High entropy alloys Materials science Mechanical alloying Microstructure Nanosize Nickel aluminides Nickel base alloys Nickel compounds Orowan strengthening Particles Plasma sintering Powder technology Precipitates Room temperature Solid phases Spark plasma sintering TiC |
| Title | AlCoCrFeNiTi-C alloy with TiC nano precipitates processed through mechanical alloying and spark plasma sintering |
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