Exceptional cryogenic strength-ductility synergy in Al0.3CoCrNi medium-entropy alloy through heterogeneous grain structure and nano-scale precipitates

Exceptional cryogenic strength-ductility synergy in Al0.3CoCrNi medium-entropy alloy through heterogeneous grain structure and nano-scale precipitates

We engineered an Al0.3CoCrNi medium-entropy alloy with heterogeneous grain structure and nanoscale precipitation through thermo-mechanical processing route, with an aim to achieve a remarkable combination of cryogenic yield strength and ductility. The alloy exhibited an exceptional combination of hi...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2019-10, Vol.766, p.138372, Article 138372
Hauptverfasser: Sathiyamoorthi, Praveen, Asghari-Rad, Peyman, Park, Jeong Min, Moon, Jongun, Bae, Jae Wung, Zargaran, Alireza, Kim, Hyoung Seop
Format: Artikel
Sprache:eng
Schlagworte:
Alloys
Cryogenic tensile properties
Deformation twins
Ductility
Elongation
Entropy
Grain structure
Heterogeneous microstructure
High-entropy alloy
Medium entropy alloys
Precipitates
Precipitation strengthening
Thermomechanical treatment
Yield strength
Yield stress
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Zusammenfassung:We engineered an Al0.3CoCrNi medium-entropy alloy with heterogeneous grain structure and nanoscale precipitation through thermo-mechanical processing route, with an aim to achieve a remarkable combination of cryogenic yield strength and ductility. The alloy exhibited an exceptional combination of high cryogenic yield strength of ∼1.1 GPa and high uniform elongation of ∼37%.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2019.138372