Heat Treatment Influence on Tribological Properties of AlCoCrCuFeNi High-Entropy Alloy in Hydrogen Peroxide-Solution

2019 ◽  
Vol 26 (8) ◽  
pp. 1286-1294 ◽  
Author(s):  
X. S. Luo ◽  
J. Li ◽  
Y. L. Jin ◽  
C. P. Hu ◽  
D. Jia ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Hydrogen Peroxide ◽  
Tribological Properties ◽  
Hydrogen Peroxide Solution ◽  
High Entropy Alloy ◽  
High Entropy

Tribological properties of AlCoCrFeNiCu high-entropy alloy in hydrogen peroxide solution and in oil lubricant

Wear ◽  
2013 ◽  
Vol 297 (1-2) ◽  
pp. 1045-1051 ◽  
Author(s):  
Haitao Duan ◽  
Yong Wu ◽  
Meng Hua ◽  
Chengqing Yuan ◽  
Ding Wang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Tribological Properties ◽  
Hydrogen Peroxide Solution ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Influence of V and Heat Treatment on Characteristics of WMoNbTaV Refractory High-Entropy Alloy Coatings by Mechanical Alloying

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 265
Author(s):  
Chun-Liang Chen ◽  
Sutrisna
Keyword(s):  
Heat Treatment ◽  
Mechanical Alloying ◽  
Annealing Treatment ◽  
High Energy ◽  
304 Stainless Steel ◽  
Homogeneous Distribution ◽  
High Entropy Alloy ◽  
Solid Solution Phase ◽  
High Entropy ◽  
Steel Substrates

Refractory high-entropy alloy (RHEA) is one of the most promising materials for use in high-temperature structural materials. In this study, the WMoNbTaV coatings on 304 stainless steel substrates has been prepared by mechanical alloying (MA). Effects of V addition and subsequent heat treatment on properties of the WMoNbTaV coatings were investigated. The results show that the RHEA coatings with nanocrystalline body-centered cubic (BCC) solid-solution phase were generated by the mechanical alloying process. The presence of the V element promotes a uniform microstructure and homogeneous distribution of composition in the RHEA coatings due to improving alloying efficiency, resulting in an increase of hardness. After the annealing treatment of the RHEA coatings, microstructure homogeneity was further enhanced; however, the high affinity of Ta for oxygen causes the formation of Ta-rich oxides. Annealing also removes strain hardening generated by high-energy ball milling and thus decreases the hardness of the RHEA coating and alters microstructure evolution and mechanical properties.

scholarly journals Effect of Microstructures and Mechanical Properties of Large Deformation High Entropy Alloy CoCrCuFeNi in Semi-solid Isothermal Heat Treatment

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Lajie WANG ◽  
Jiao XIONG ◽  
Jun LIU ◽  
X J YANG
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cold Rolling ◽  
Liquid Fraction ◽  
Grain Morphology ◽  
High Entropy Alloy ◽  
Isothermal Heat Treatment ◽  
Scanning Calorimetry ◽  
High Entropy ◽  
Semi Solid

The semi-solid slurries of the CoCrCuFeNi high entropy alloy (HEA) were fabricated through the recrystallization and partial melting (RAP) process by cold-rolling and partial remelting. The temperature range of the semi-solid region and the relationship between the liquid fraction and the temperature were determined by the differential scanning calorimetry (DSC) curve. The effect of isothermal temperature and holding time on the evolution of the microstructure and mechanical properties of the rolled samples was analyzed. The results show that the microstructure was significantly deformed, and the tensile strength has been increased by 107% after 63% rolling deformation of the CoCrCuFeNi high entropy alloy (HEA). The high-entropy alloy after cold rolling was maintained at 1150 and 1300 ° C for 20, 30, 60, and 120 minutes respectively, the plasticity has been improved compared with the rolled high entropy alloy. The optimal plasticity was reached 13.7% and 7.9% at 1150 ℃ and 1300℃ for 30 minutes, respectively. After semi-solid isothermal heat treatment, the grain morphology changed from dendritic of as-cast or rolled to spherulite and the grain size increased significantly with time and the holding temperature increased.

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