Effects of Al addition on the microstructure and mechanical property of AlxCoCrFeNi high-entropy alloys

2012 ◽  
Vol 26 ◽  
pp. 44-51 ◽  
Author(s):  
Woei-Ren Wang ◽  
Wei-Lin Wang ◽  
Shang-Chih Wang ◽  
Yi-Chia Tsai ◽  
Chun-Hui Lai ◽  
...  
Keyword(s):  
Mechanical Property ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Al Addition ◽  
Microstructure And Mechanical Property

scholarly journals Low neutron cross-section FeCrVTiNi based high-entropy alloys: design, additive manufacturing and characterization

2022 ◽  
Author(s):  
Bosheng Dong ◽  
Zhiyang Wang ◽  
Hanliang Zhu ◽  
Ondrej Muránsky ◽  
Zhijun Qiu ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Additive Manufacturing ◽  
Cross Section ◽  
Neutron Cross Section ◽  
Nominal Composition ◽  
High Entropy Alloys ◽  
Contributing Factors ◽  
Dendritic Microstructure ◽  
High Entropy ◽  
Chemical Segregation

The development of high-entropy alloys (HEAs) based on the novel alloying concept of multi-principal components presents opportunities for achieving new materials with desired properties for increasingly demanding applications. In this study, a low neutron cross-section FeCrVTiNi-based HEA was developed for potential nuclear applications. A face-centred cubic (FCC) HEA with the nominal composition of FeCr0.4V0.3Ti0.2Ni1.3 is proposed based on the empirical thermodynamic models and the CALculation of PHAse diagrams (CALPHAD) calculation. Verifications of the predictions were performed, including the additive manufacturing of the proposal material and a range of microstructural characterizations and mechanical property tests. Consistent with the prediction, the as-fabricated HEA consists of a dominant FCC phase and minor Ni3Ti precipitates. Moreover, significant chemical segregation in the alloy, as predicted by the CALPHAD modelling, was observed experimentally in the produced dendritic microstructure showing the enrichment of Ni and Ti elements in the interdendritic regions and the segregation of Cr and V elements in the dendritic cores. Heterogenous mechanical properties, including microhardness and tensile strengths, were observed along the building direction of the additively manufactured HEA. The various solid solution strengthening effects, due to the chemical segregation (in particular Cr and V elements) during solidification, are identified as significant contributing factors to the observed mechanical heterogeneity. Our study provides useful knowledge for the design and additive manufacturing of compositionally complex HEAs and their composition-microstructure-mechanical property correlation.

Effect of Al addition on the microstructures and deformation behaviors of non-equiatomic FeMnCoCr metastable high entropy alloys

2021 ◽  
Vol 119 (26) ◽  
pp. 261902
Author(s):  
Ning Xu ◽  
Zhimin Yang ◽  
Xing Mu ◽  
Yubo Huang ◽  
Shilei Li ◽  
...  
Keyword(s):  
High Entropy Alloys ◽  
High Entropy ◽  
Deformation Behaviors ◽  
Al Addition
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