scholarly journals Tribological Behavior of Boronized Fe40Mn20Cr20Ni20 High-Entropy Alloys

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1561
Author(s):  
Xin Guo ◽  
Xi Jin ◽  
Xiaohui Shi ◽  
Huijun Yang ◽  
Min Zhang ◽  
...  
Keyword(s):  
Wear Rate ◽  
Abrasive Wear ◽  
Wear Mechanism ◽  
Tribological Behavior ◽  
Deionized Water ◽  
Cubic Phase ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Delamination Wear ◽  
Hot Rolled

The tribological behavior of hot-rolled and boronized Fe40Mn20Cr20Ni20 high-entropy alloys (HEAs) sliding against a Si3N4 ball was investigated in the air, deionized water and seawater. The results showed that the hot-rolled Fe40Mn20Cr20Ni20 HEA was composed of an FCC (face-centered cubic) phase. In addition, the boronized HEA was composed of a great number of borides, including CrB, FeB, MnB, Fe2B, Fe3B and MnB2. The hardness increased from 139 HV to 970 HV after boronizing. In air, the wear rate decreased from 4.51 × 10−4 mm3/Nm to 0.72 × 10−4 mm3/Nm after boronizing. The wear mechanism transformed from abrasive wear and oxidative wear to the polishing effect. After boronizing, in the deionized water, the wear rate decreased from 1.27 × 10−4 mm3/Nm to 8.43 × 10−5 mm3/Nm. The wear mechanism transformed from abrasive wear and delamination wear to delamination wear. In the seawater, the wear rate decreased by about ten times that of hot-rolled alloy.

Stability and structure prediction of cubic phase in as cast high entropy alloys

2013 ◽  
Vol 30 (3) ◽  
pp. 363-369 ◽  
Author(s):  
Z.-S. Nong ◽  
J.-C. Zhu ◽  
Y. Cao ◽  
X.-W. Yang ◽  
Z.-H. Lai ◽  
...  
Keyword(s):  
Structure Prediction ◽  
Cubic Phase ◽  
High Entropy Alloys ◽  
High Entropy

Tribological Behavior of AlCoCrFeNi(Ti0.5) High Entropy Alloys under Oil and MACs Lubrication

2016 ◽  
Vol 32 (5) ◽  
pp. 470-476 ◽  
Author(s):  
Yuan Yu ◽  
Jun Wang ◽  
Jinshan Li ◽  
Jun Yang ◽  
Hongchao Kou ◽  
...  
Keyword(s):  
Tribological Behavior ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals High-Temperature Deformation Behaviors of the C-Doped and N-Doped High Entropy Alloys

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1517
Author(s):  
Hailong Yi ◽  
Yifan Zhang ◽  
Renyi Xie ◽  
Mengyuan Bi ◽  
Daixiu Wei
Keyword(s):  
High Temperature ◽  
Strain Rate ◽  
Flow Behavior ◽  
Temperature Deformation ◽  
Cubic Phase ◽  
High Entropy Alloys ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Recrystallization Mechanism ◽  
Low Strain Rate

High entropy alloys (HEAs) containing multi-principal metallic constituents have attracted much attention. A good understanding of their hot-deformation behavior and recrystallization mechanism is the prerequisite for microstructures tuning and for optimizing mechanical performance. Here, the flow behavior and recrystallization mechanism of the N-doped and C-doped face-centered cubic phase HEAs are produced at high temperatures by hot-compression at 1123–1273 K, with strain rates of 0.1–0.001 s−1. Constitutive equations were successfully constructed to reveal flow behavior, and stress-strain curves were predicted using strain compensated polynomial functions. Discontinuous and continuous dynamic recrystallization proceeded concurrently when compressed at a low temperature and high strain rate, whereas discontinuous recrystallization, which occurs at primary grain boundaries, became predominant at a high temperature and low strain rate, significantly contributing to the refinement and homogenization of the grains. For this reason, a relatively high temperature and a low strain rate, in which the recrystallized grains exhibit equiaxed morphology and very weak texture, are more suitable for refining grains. The average size of the grains was approximately 10 μm. This study sheds light on grain optimization and mechanical properties through thermomechanical processing.

Phase evolution and wear mechanism of AlCoCrFeNiSix high-entropy alloys produced by arc melting

2018 ◽  
Vol 5 (9) ◽  
pp. 096505 ◽  
Author(s):  
Bingqian Jin ◽  
Nannan Zhang ◽  
Fengzhen Wang ◽  
Yue Zhang ◽  
Deyuan Li
Keyword(s):  
Wear Mechanism ◽  
Phase Evolution ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Arc Melting

Tribological behavior of boronized Al0.1CoCrFeNi high-entropy alloys under dry and lubricated conditions

Wear ◽  
2020 ◽  
Vol 460-461 ◽  
pp. 203452 ◽  
Author(s):  
Y.H. Wu ◽  
H.J. Yang ◽  
R.P. Guo ◽  
X.J. Wang ◽  
X.H. Shi ◽  
...  
Keyword(s):  
Tribological Behavior ◽  
High Entropy Alloys ◽  
High Entropy

Microstructure and Abrasion Resistance of Laser Cladding CoCrFeNiTiNbB1.25 High-Entropy Alloys Coatings Treated by Aging

2021 ◽  
Vol 13 (8) ◽  
pp. 1479-1487
Author(s):  
Lin Ding ◽  
Hongxin Wang ◽  
Xiumin Quan
Keyword(s):  
Abrasive Wear ◽  
Mass Loss ◽  
Laser Cladding ◽  
Aging Temperature ◽  
Abrasion Resistance ◽  
Volume Fraction ◽  
High Entropy Alloys ◽  
H13 Steel ◽  
High Entropy ◽  
The Right

Laser cladding CoCrFeNiTiNbB1.25 high-entropy alloys coatings on H13 steel was fabricated. The microstructure and abrasion resistance of aged high-entropy alloys coatings at different temperature were researched. Results showed the phase was not changed in the high-entropy alloys coatings as the aging temperature elevated, the volume fraction of TiB phase was firstly increased, then reduced. The diffraction peak of fcc phase was firstly shifted to the right, and then shifted to the left. The aged high-entropy alloys coatings consisted of typical dendrite, interdendritic eutectic and dispersed intermetallic compound, and the dendrite obviously was coarsened after aging at 850 °C. Compared with non-aged high-entropy alloys coatings, the microhardness of aged high-entropy alloys coatings was firstly elevated as the aging temperature elevated, then decreased, and the mass loss was opposite. The microhardness and mass loss was decreased by 4.3% and 11.9%, respectively, for the aging at 750 °C. The abrasion mechanism of non-aged high-entropy alloys coatings was the abrasive wear, and was the abrasive wear and adhesive wear after aging.

scholarly journals Effects of CeO2 Content on Friction and Wear Properties of SiCp/Al-Si Composite Prepared by Powder Metallurgy

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4547
Author(s):  
Bin Yang ◽  
Aiqin Wang ◽  
Kunding Liu ◽  
Chenlu Liu ◽  
Jingpei Xie ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Abrasive Wear ◽  
Wear Mechanism ◽  
Friction And Wear ◽  
Wear Properties ◽  
Minimum Value ◽  
Maximum Value ◽  
Friction And Wear Properties

SiCp/Al-Si composites with different CeO2 contents were prepared by a powder metallurgy method. The effect of CeO2 content on mechanical properties, friction and wear properties of the composites was studied. The results show that with the increase in CeO2 content from 0 to 1.8 wt%, the density, hardness, friction coefficient of the composites first increases and then decreases, the coefficient of thermal expansion (CTE) and wear rate of the composites first decreases and then increases. When the content of CeO2 was 0.6 wt%, the density and hardness of the composite reached the maximum value of 98.54% and 113.7 HBW, respectively, the CTE of the composite reached the minimum value of 11.1 × 10−6 K−1, the friction coefficient and wear rate of the composite reached the maximum value of 0.32 and the minimum value of 1.02 mg/m, respectively. CeO2 has little effect on the wear mechanism of composites, and the wear mechanism of composites with different CeO2 content is mainly abrasive wear under the load of 550 N. Compared with the content of CeO2, load has a great influence on the wear properties of the composites. The wear mechanism of the composites is mainly oxidation wear and abrasive wear under low load. With the increase in load, the wear degree of abrasive particles is aggravated, and adhesive wear occurs under higher load.

scholarly journals Microstructure and Properties of AA6061/SiCp Composites Sintered under Ultra High-Pressure

2020 ◽  
Vol 10 (20) ◽  
pp. 7363
Author(s):  
Lei Xu ◽  
Erkuo Yang ◽  
Yasong Wang ◽  
Changyun Li ◽  
Zhiru Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Wear Resistance ◽  
Wear Rate ◽  
Abrasive Wear ◽  
Wear Mechanism ◽  
Adhesive Wear ◽  
Wear Property ◽  
Ultra High Pressure ◽  
High Pressure Sintering

Ultra high-pressure sintering (UHPS) was used to prepare AA6061/SiCp composites with different contents and the effect of sintering temperatures on microstructure and mechanical properties was investigated in this study. The results showed that a uniform distribution of nano-SiC particles (N-SiCp) is obtained by the UHPS method. With the increase in N-SiCp contents, the higher hardness and better wear resistance could be inspected. The interfacial reactions and Al4C3 phase appeared above 550 °C. The relative density of composites first increased and then decreased; with the temperature raising it reached 99.58% at 600 °C. The hardness and wear property showed the same trend with the hardness reaching 52 HRA and wear rate being 1.0 × 10−6 g/m at 600 °C. Besides, the wear mechanism of the composites is mainly composed of abrasive wear and adhesive wear.

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