scholarly journals Formation, Stability and Ultrahigh Strength of Novel Nanostructured Alloys by Partial Crystallization of High-Entropy (Fe 0.25Co 0.25Ni 0.25Cr 0.125Mo 0.125) 86‒89B 11‒14 Amorphous Phase

2019 ◽  
Author(s):  
F. Wang ◽  
Akihisa Inoue ◽  
F. L. Kong ◽  
S. L. Zhu ◽  
E. Shalaan ◽  
...  
Keyword(s):  
Amorphous Phase ◽  
Nanostructured Alloys ◽  
High Entropy ◽  
Ultrahigh Strength ◽  
Partial Crystallization

scholarly journals Effects of Silicon Content on the Microstructures and Mechanical Properties of (AlCrTiZrV)-Six-N High-Entropy Alloy Films

Entropy ◽  
2019 ◽  
Vol 21 (1) ◽  
pp. 75 ◽  
Author(s):  
Jingrui Niu ◽  
Wei Li ◽  
Ping Liu ◽  
Ke Zhang ◽  
Fengcang Ma ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Amorphous Phase ◽  
Silicon Content ◽  
High Entropy Alloy ◽  
Strengthening Effect ◽  
Nanocomposite Structure ◽  
High Entropy ◽  
Nanocrystalline Structures ◽  
Microstructures And Mechanical Properties

A series of (AlCrTiZrV)-Six-N films with different silicon contents were deposited on monocrystalline silicon substrates by direct-current (DC) magnetron sputtering. The films were characterized by the X-ray diffractometry (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and nano-indentation techniques. The effects of the silicon content on the microstructures and mechanical properties of the films were investigated. The experimental results show that the (AlCrTiZrV)N films grow in columnar grains and present a (200) preferential growth orientation. The addition of the silicon element leads to the disappearance of the (200) peak, and the grain refinement of the (AlCrTiZrV)-Six-N films. Meanwhile, the reticular amorphous phase is formed, thus developing the nanocomposite structure with the nanocrystalline structures encapsulated by the amorphous phase. With the increase of the silicon content, the mechanical properties first increase and then decrease. The maximal hardness and modulus of the film reach 34.3 GPa and 301.5 GPa, respectively, with the silicon content (x) of 8% (volume percent). The strengthening effect of the (AlCrTiZrV)-Six-N film can be mainly attributed to the formation of the nanocomposite structure.

Amorphous phase stability of NbTiAlSiN X high-entropy films

Rare Metals ◽  
2017 ◽  
Vol 37 (8) ◽  
pp. 682-689 ◽  
Author(s):  
Wen-Jie Sheng ◽  
Xiao Yang ◽  
Jie Zhu ◽  
Cong Wang ◽  
Yong Zhang
Keyword(s):  
Amorphous Phase ◽  
Phase Stability ◽  
High Entropy

High-entropy alloy particle reinforced Al-based amorphous alloy composite with ultrahigh strength prepared by spark plasma sintering

2016 ◽  
Vol 109 ◽  
pp. 219-226 ◽  
Author(s):  
Zhen Tan ◽  
Lu Wang ◽  
Yunfei Xue ◽  
Peng Zhang ◽  
Tangqing Cao ◽  
...  
Keyword(s):  
Amorphous Alloy ◽  
Spark Plasma Sintering ◽  
High Entropy Alloy ◽  
Alloy Composite ◽  
Alloy Particle ◽  
High Entropy ◽  
Ultrahigh Strength ◽  
Plasma Sintering ◽  
Spark Plasma

Amorphous phase formation rules in high-entropy alloys

2017 ◽  
Vol 26 (1) ◽  
pp. 018104 ◽  
Author(s):  
Qiu-Wei Xing ◽  
Yong Zhang
Keyword(s):  
Amorphous Phase ◽  
Phase Formation ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Amorphous Phase Formation

scholarly journals Effects of Nb Addition on Microstructures and Mechanical Properties of Nbx-CoCrFeMnNi High Entropy Alloy Films

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1539
Author(s):  
Yu-Hsuan Liang ◽  
Chia-Lin Li ◽  
Chun-Hway Hsueh
Keyword(s):  
Mechanical Properties ◽  
Amorphous Phase ◽  
Compressive Yield Strength ◽  
High Entropy Alloy ◽  
Face Centered Cubic ◽  
Compression Tests ◽  
Alloy Films ◽  
High Entropy ◽  
Microstructures And Mechanical Properties ◽  
Nb Addition

In the present work, Nbx-CoCrFeMnNi high entropy alloy films (HEAFs, 0 to 7.2 at.% Nb) were fabricated by radio frequency (RF) magnetron co-sputtering of CoCrFeMnNi alloy and Nb targets. The effects of Nb addition on the microstructures and mechanical properties of HEAFs were systematically investigated. For Nb-free film (0 at.% Nb), the face-centered cubic (FCC) peaks were identified in the X-ray diffraction (XRD) pattern. The addition of Nb resulted in a broadening of diffraction peaks, a decrease in peak intensity, and the vanishment of high-angle peaks. Transmission electron microscope (TEM) images indicated the formation of nanotwins at low Nb concentrations, and a transition from a single phase FCC solid solution to an amorphous phase was observed with the increasing Nb concentration. The films were strengthened with an increase in Nb concentration. Specifically, the hardness characterized by nanoindentation increased from 6.5 to 8.1 GPa. The compressive yield strength and fracture strength measured from micropillar compression tests were improved from 1.08 GPs and 2.56 GPa to 2.70 GPa and 5.76 GPa, respectively, whereas the fracture strain decreased from >29.4% (no fracture) to 15.8%. Additionally, shear banding was observed in the presence of amorphous phase.

Development of ultrahigh strength novel Co–Cr–Fe–Ni–Zr quasi-peritectic high entropy alloy by an integrated approach using experiment and simulation

Materialia ◽  
2020 ◽  
Vol 14 ◽  
pp. 100896
Author(s):  
Reliance Jain ◽  
Avi Jain ◽  
M.R. Rahul ◽  
Ashok Kumar ◽  
Mrigendra Dubey ◽  
...  
Keyword(s):  
Integrated Approach ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Ultrahigh Strength ◽  
Experiment And Simulation

Effect of Annealing Treatment on the Microstructure and Magnetic Properties of FeSiBAlNi(C, Ce) High Entropy Alloys

2016 ◽  
Vol 849 ◽  
pp. 52-57 ◽  
Author(s):  
Jing Xu ◽  
Zheng Feng Zhao ◽  
Yan Wang
Keyword(s):  
Magnetic Properties ◽  
Amorphous Phase ◽  
Annealing Treatment ◽  
Particle Morphology ◽  
High Entropy Alloys ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
High Entropy ◽  
Temperature Range ◽  
Microstructure And Magnetic Properties

In this paper, the effects of annealing treatment on the microstructure, thermal property and magnetic properties of mechanical alloyed FeSiBAlNiC and FeSiBAlNiCe amorphous high entropy alloys has been systematically investigated using X-ray diffraction, differential scanning calorimetry, field emission scanning electron microscopy and alternation gradient magnetometry. The results showed that annealing at different temperature range induced the pronounced microstructural evolution from the amorphous phase to a mixture of amorphous phase and intermetallics but without any formation of solid solutions. In addition, the thermal stability and heat resistance were enhanced with increasing the annealing temperature. Similarly, annealing treatment also had significant effect on the particle morphology, making the particles evolve from near-round shape to plate-like shape. Furthermore, subsequent annealing of W6-Ce amorphous HEAs enhanced the saturation magnetization (Ms) remarkably (from 0.6 emu/g of 140 h as-milled W6-Ce to 20.17 emu/g). But for the Ms values of the 140 h as-milled amorphous W6-C HEAs, annealing in different temperature range all exhibited a slightly decreased effect.

Ultrahigh-strength CoCrFeMnNi high-entropy alloy wire rod with excellent resistance to hydrogen embrittlement

2018 ◽  
Vol 732 ◽  
pp. 105-111 ◽  
Author(s):  
Young Jin Kwon ◽  
Jong Woo Won ◽  
Sung Hyuk Park ◽  
Jeong Hun Lee ◽  
Ka Ram Lim ◽  
...  
Keyword(s):  
Hydrogen Embrittlement ◽  
High Entropy Alloy ◽  
Alloy Wire ◽  
High Entropy ◽  
Wire Rod ◽  
Ultrahigh Strength
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