Journal
SCRIPTA MATERIALIA
Volume 69, Issue 4, Pages 342-345Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.05.020
Keywords
High-entropy alloy; Interstitial atoms; Martensite; Properties
Categories
Funding
- National Natural Science Foundation of China [51271001]
- Opening Project of Jiangsu Key Laboratory of Advanced Metallic Materials [AMM201201]
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A FeCoNiCrCuTiMoAlSiB0.5 high-entropy alloy (HEA) comprised of a lath-like martensite phase was fabricated by laser cladding. The alloy combines attractive properties including hardness (11.6 GPa), elastic constant (187.1 GPa), fracture toughness (50.9 MPa m(0.5)) and softening resistance (up to 900 degrees C). The nucleation of the martensite phase is co-triggered by laser rapid solidification and interstitial boron solute, owing to the improved lattice strain energy. The designed strengthening by martensite and interstitial solutes may enhance both hardness and toughness in other rapidly solidified HEAs. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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