A novel Fe-rich low-cost as-cast heterostructure medium entropy alloy with excellent mechanical properties

•A novel Fe-rich low-cost MEA was designed.•FCC+BCC+B2 heterostructures emerge in this MEA simply by casting.•This as-cast MEA shows excellent mechanical properties and low cost.•Complex interaction between solid solution and B2 nano-particles exists in this MEA. A novel FCC+BCC+B2 heterostructure F...

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Bibliographic Details
Published inMaterials letters Vol. 377; p. 137447
Main Authors Zhang, Guangzeng, Lei, Nuo, Zhou, Zixuan, Hu, Shuai, Wu, Shaojie, Cai, Yongfu, Wang, Tan, Li, Fushan, Wei, Ran, Guan, Shaokang, Chen, Chen
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.12.2024
Subjects
Casting
Heterostructure effect
Mechanical properties
Medium entropy alloys
Microstructure
Mechanical properties
Casting
Microstructure
Medium entropy alloys
Heterostructure effect
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Summary:•A novel Fe-rich low-cost MEA was designed.•FCC+BCC+B2 heterostructures emerge in this MEA simply by casting.•This as-cast MEA shows excellent mechanical properties and low cost.•Complex interaction between solid solution and B2 nano-particles exists in this MEA. A novel FCC+BCC+B2 heterostructure Fe2.5CrNiAl0.3Si0.3 medium entropy alloy (MEA) was successfully designed and fabricated via arc-melting. The micron-to-submicron-scale FCC and BCC phases and nano-scale B2 particles in both phases realize complex heterostructure effect, leading to superb ultimate tensile strength and high plasticity of this as-cast MEA, and its Fe-rich Co-free characteristic is beneficial for the combination of excellent mechanical properties and low raw material expenses. This work provides valuable insight and a novel route into developing new cost-effective and high-performance as-cast MEAs.
ISSN:0167-577X
DOI:10.1016/j.matlet.2024.137447