Effects of Mo on microstructure and mechanical properties of Fe2Ni2CrMox eutectic high entropy alloys

Published on Feb 15, 2021in Materials Chemistry and Physics4.094
路 DOI :10.1016/J.MATCHEMPHYS.2020.124175
Wenna Jiao3
Estimated H-index: 3
(DUT: Dalian University of Technology),
Hui Jiang16
Estimated H-index: 16
(SDUST: Shandong University of Science and Technology)
+ 4 AuthorsTingju Li26
Estimated H-index: 26
(DUT: Dalian University of Technology)
Source
Abstract
Abstract Eutectic high-entropy alloys (EHEAs) have drawn extensive attention due to their excellent castability and remarkable combination of strength and plasticity. In this study, a new Fe2Ni2CrMox (x = 0.25, 0.50, 0.75, 1.0, 1.25, 1.50) EHEA family was designed and prepared, with the dependence of microstructural and mechanical evolution on the Mo addition investigated. As the increase of Mo addition in the Fe2Ni2CrMox EHEA, the microstructure evolves from hypoeutectic (x = 0.25) to near-eutectic (x = 1.25) and then to hypereutectic (x = 1.50), where the stacked lamellae consist of a face-centered cubic (FCC) phase and a topological close-packed (TCP) 蟽 phase. Among all the compositions, the Fe2Ni2CrMo1.5 EHEA exhibits the most excellent comprehensive mechanical properties, with the yield strength, fracture strength and compressive plasticity being 1503MPa, 2199MPa and 17.6%, respectively.
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References41
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#1Tingting Xu (DUT: Dalian University of Technology)H-Index: 1
#2Yiping Lu (DUT: Dalian University of Technology)H-Index: 34
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In this work, the alloying effects of Ta element on the microstructure evolution and mechanical properties of CoCu0.5FeNiTax (x = 0-0.6 at.%) high-entropy alloys were studied. The microstructure changed from single solid solution to hypoeutectic, then to eutectic, and finally to hypereutectic with the increase in Ta content, which is because Ta element facilitates the Laves phase to form. The volume fraction of hard and brittle Laves phase increases with the Ta content, which increases the yield...
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#1Qingfeng Wu (NPU: Northwestern Polytechnical University)H-Index: 26
#2Zhijun Wang (NPU: Northwestern Polytechnical University)H-Index: 29
Last. Jincheng Wang (NPU: Northwestern Polytechnical University)H-Index: 29
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Abstract Mechanical properties of casting alloys are generally limited. To make casting alloys applicable for a high level of service environments, a novel casting eutectic high entropy alloy (EHEA) with excellent mechanical properties is proposed. The hierarchical microstructures are with fine regular lamellar eutectic and coarse irregular eutectic. The eutectics consists of face-centered cubic (FCC) and ordered body-centered cubic (B2) phases with the semi-coherent interface. In the as-cast st...
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#1Barnasree Chanda (IIT-KGP: Indian Institute of Technology Kharagpur)H-Index: 4
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Abstract To overcome the limited mechanical properties of single-phase FCC/BCC high entropy alloys, a large effort is being made towards the development of eutectic composites. The eutectic/near eutectic high entropy alloys (EHEAs) with alternate lamellar phases provide an optimum balance between strength and ductility. Therefore, CoCrFeNiNb x (0.45 x 0.65) and CoCrFeNiTa y (0.2 y 2 Nb/Co 2 Nb type Laves phase were synthesized by arc-melting and were characterized by x-ray diffraction, scanning ...
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#6Jun Yang (CAS: Chinese Academy of Sciences)H-Index: 118
Abstract This paper is aimed to evaluate the high temperature tribological behaviors of CoCrFeNiNbx eutectic high entropy alloys which would be highly-promising candidates for high-temperature applications. The effects of testing temperature and material structure on the friction and wear properties are investigated. The CoCrFeNiNbx alloys display a low harness decrement rate about 35% from room temperature to 1000鈥癈, indicating good softening resistance. The main wear mechanisms are abrasion w...
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#1Xi Jin (HIT: Harbin Institute of Technology)H-Index: 9
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A series of CoCrFeNiMo x ( x = 0.2, 0.4, 0.6, 0.8, 1.0, and 1.2) high-entropy alloys were designed to develop a eutectic high-entropy alloy system and to acquire a superfine eutectic structure. The results show that for the CoCrFeNiMo x alloys, with the increase of Mo content from 0.2 to 1.2, the microstructures shift from a typical dendrite structure to a hypoeutectic microstructure ( x = 0.6), and then to a fully eutectic microstructure ( x = 0.8) with a lamellar spacing only 110 nm, and final...
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Abstract null null The present investigation was an evaluation of the microstructure and mechanical properties in as-cast non-equiatomic medium entropy alloys (MEAs) (AlNi2)70-xCo30Crx (with x = 2.5, 10, 17.5, and 25聽at.%), showing dual- or multi-phases structure (near-eutectic microstructure). The majority phase of developed MEAs was FCC (L12) phase and the minority phase was the ordered BCC (B2) phase. The t typical eutectic microstructure was formed in the matrix area of all MEAs and a little...
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Abstract null null TiC/Fe0.6MnNi1.4 medium entropy alloy matrix composites with different volume fractions of TiC particles (i.e., 5, 10 and 15 vol.%) were prepared by induction melting method. The experimental results showed that both the base alloy and the composite matrix possess face-centered cubic structure. The in-situ TiC reinforcement phase can significantly increase the mechanical properties of the composites at room temperature. In particular, the hardness, yield strength and ultimate ...
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