Journal
MATERIALS LETTERS
Volume 307, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2021.130958
Keywords
Medium-entropy alloys; Lath martensite; Precipitation; Tensile strength; Hot rolling
Funding
- National Research Foundation of Korea [NRF:2016M3D1A1023384, 2017H1D3A1A01 013666, 2019H1D3A1A01102866]
- National Research Foundation of Korea [2019H1D3A1A01102866] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, a Fe50Co25Ni10Al5Ti5Mo5 medium entropy alloy was fabricated through casting and processed by hot rolling and heat treatment to achieve high strength via martensitic structure and precipitation. The resulting sample exhibited fine lath martensite structure, two types of precipitates, retained FCC phase, and high dislocation density, leading to superior tensile properties with an extremely high tensile strength of 1.7 GPa and good uniform elongation of 8%.
A Fe50Co25Ni10Al5Ti5Mo5 medium entropy alloy was fabricated through the casting route and processed by hot rolling and heat treatment to achieve high strength via martensitic structure and precipitation. The hot-rolled plate heat-treated at 1000 degrees C for 10 min exhibited fine lath martensite structure, two kind of precipitates, retained FCC phase, and high dislocation density. The sample with this complex microstructure exhibited su-perior tensile properties with an extremely high tensile strength of -1.7 GPa and a good uniform elongation of -8%.
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