Plastic deformation and strengthening mechanism of FCC/HCP nano-laminated dual-phase CoCrFeMnNi high entropy alloy

2021 ◽  
Author(s):  
Cheng Huang ◽  
Yin Yao ◽  
Xianghe Peng ◽  
Shaohua Chen
Keyword(s):  
Plastic Deformation ◽  
Strengthening Mechanism ◽  
High Entropy Alloy ◽  
Dual Phase ◽  
High Entropy

Severe plastic deformation driven nanostructure and phase evolution in a Al 0.5 CoCrFeMnNi dual phase high entropy alloy

2017 ◽  
Vol 91 ◽  
pp. 150-157 ◽  
Author(s):  
T.S. Reddy ◽  
I.S. Wani ◽  
T. Bhattacharjee ◽  
S.R. Reddy ◽  
R. Saha ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Phase Evolution ◽  
High Entropy Alloy ◽  
Dual Phase ◽  
High Entropy

scholarly journals Structure and toughening mechanical properties of multi principal component high entropy alloy

2021 ◽  
Vol 25 (6 Part A) ◽  
pp. 4019-4025
Author(s):  
Junhao Dai
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Principal Component ◽  
Alloy System ◽  
Strengthening Mechanism ◽  
High Entropy Alloy ◽  
Toughening Mechanism ◽  
High Entropy ◽  
Specific Strength ◽  
Deformation Ability

At present, the strength and toughening degree of the multi-principal element high entropy alloy are not high, and the plastic deformation capacity is poor. In order to solve this problem, the structure and mechanical properties of the multi-element high entropy alloy were studied. The micro-structure and strengthening mechanism of the alloy were studied. By establishing a reliable random solid solution model and using the first principle to calculate the phase structure, thermodynamics, and elastic properties of the alloy, theoretical guidance is provided for the design and development of new high entropy alloy. The high entropy alloy system with high specific strength and high tensile plasticity was prepared, and its strengthening and toughening mechanism was studied. The experimental results show that with the increase of Zr content, the fracture strength of multi-component high entropy alloy first increases and then decreases. When it reaches a fixed value, the comprehensive mechanical properties of the alloy are the best. Compared with the two literature methods, the tensile strength of this method is 250 MPa, and the work hardening after yielding makes the alloy have higher strength and better plastic deformation ability.

Strengthening mechanism in two-phase FeCoCrNiMnAl high entropy alloy coating

2020 ◽  
Vol 530 ◽  
pp. 147205 ◽  
Author(s):  
Yan Cui ◽  
Junqi Shen ◽  
Sunusi Marwana Manladan ◽  
Keping Geng ◽  
Shengsun Hu
Keyword(s):  
Alloy Coating ◽  
Strengthening Mechanism ◽  
High Entropy Alloy ◽  
Two Phase ◽  
High Entropy

Microstructure and compression properties of a dual-phase FeCoCrMn high-entropy alloy

2021 ◽  
Author(s):  
Lijing Lin ◽  
Xin Xian ◽  
Zhihong Zhong ◽  
Kuijing Song ◽  
Chengyong Wang ◽  
...  
Keyword(s):  
High Entropy Alloy ◽  
Dual Phase ◽  
High Entropy ◽  
Compression Properties

Chemical evolution-induced strengthening on AlCoCrNi dual-phase high-entropy alloy with high specific strength

2019 ◽  
Vol 777 ◽  
pp. 828-834 ◽  
Author(s):  
Elyorjon Jumaev ◽  
Sung Hwan Hong ◽  
Jeong Tae Kim ◽  
Hae Jin Park ◽  
Young Seok Kim ◽  
...  
Keyword(s):  
Chemical Evolution ◽  
High Entropy Alloy ◽  
Dual Phase ◽  
High Entropy ◽  
Specific Strength ◽  
High Specific Strength

scholarly journals Small-Scale Plastic Deformation of Nanocrystalline High Entropy Alloy

Entropy ◽  
2018 ◽  
Vol 20 (11) ◽  
pp. 889 ◽  
Author(s):  
Sanghita Mridha ◽  
Mageshwari Komarasamy ◽  
Sanjit Bhowmick ◽  
Rajiv Mishra ◽  
Sundeep Mukherjee
Keyword(s):  
Plastic Deformation ◽  
Rate Sensitivity ◽  
Small Scale ◽  
High Entropy Alloy ◽  
Compression Tests ◽  
High Entropy ◽  
Grain Sizes ◽  
Plastic Deformation Behavior ◽  
High Strain Rate Sensitivity ◽  
Widespread Interest

High entropy alloys (HEAs) have attracted widespread interest due to their unique properties at many different length-scales. Here, we report the fabrication of nanocrystalline (NC) Al0.1CoCrFeNi high entropy alloy and subsequent small-scale plastic deformation behavior via nano-pillar compression tests. Exceptional strength was realized for the NC HEA compared to pure Ni of similar grain sizes. Grain boundary mediated deformation mechanisms led to high strain rate sensitivity of flow stress in the nanocrystalline HEA.

Influence of plastic deformation on the phase composition, texture, and mechanical properties of the CrMnFeCoNi2Cu high-entropy alloy

2015 ◽  
Vol 37 (1) ◽  
pp. 21-26 ◽  
Author(s):  
I. V. Karpets’ ◽  
O. M. Myslyvchenko ◽  
M. O. Krapivka ◽  
V. F. Gorban’ ◽  
O. S. Makarenko ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Phase Composition ◽  
High Entropy Alloy ◽  
High Entropy

Influence of alumina whisker or nano-carbon contents on the microstructure and mechanical properties of CuZrTiAlNi refractory high entropy alloy composites

2020 ◽  
Vol 62 (7) ◽  
pp. 678-688
Author(s):  
X. Jiang ◽  
J. Chen ◽  
H. Sun ◽  
Z. Shao
Keyword(s):  
Mechanical Properties ◽  
Load Transfer ◽  
Microwave Sintering ◽  
Fracture Morphology ◽  
Strengthening Mechanism ◽  
Cold Isostatic Pressing ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Structure And Property ◽  
Fine Grain

Abstract High-entropy alloy composites were fabricated by ball milling, cold isostatic pressing and microwave sintering to which were added varied contents of Al2O3 whiskers, La-Ce, and carbon nanotubes-graphene, respectively. The structure and mechanical properties of the composites were investigated by X-ray diffraction, scanning electron microscopy and a microhardness tester. The high-entropy alloy and composites show amorphous phases and some crystalline phases. Accordingly, the addition of the reinforcement phase can refine the grain size. The formation mechanism of the phase is mainly related to the factors of mixing entropy, enthalpy, differences in atomic size, and the structure and property of the elements. The hardness of the composites is higher than that of the alloy (437.5 HV), and those composites reinforced by 0.5 wt.-% nanotubes- 0.5 wt.-% graphene are the highest (593.99 HV). The fracture morphology of the Al2O3 whisker reinforced composite shows a river pattern, indicating brittle cleavage. According to the research results, it can be concluded that the strengthening mechanism of the high entropy alloy composites mainly reflects fine grain strengthening and load transfer, and the toughening mechanism mainly crack bridging and a pulling out of the reinforcing phase.

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