Effect of heat treatment on the microstructure, microhardness, and wear characteristics of AlCrFeCuNi high-entropy alloy

2020 ◽  
Vol 111 (7-8) ◽  
pp. 2021-2029
Author(s):  
N. Malatji ◽  
T. Lengopeng ◽  
S. Pityana ◽  
A. P. I. Popoola
Keyword(s):  
Heat Treatment ◽  
High Entropy Alloy ◽  
Wear Characteristics ◽  
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.

Effect of heat treatment on the interface of high-entropy alloy particles reinforced aluminum matrix composites

2020 ◽  
Vol 822 ◽  
pp. 153658 ◽  
Author(s):  
Zhanwei Yuan ◽  
Wenbin Tian ◽  
Fuguo Li ◽  
Qinqin Fu ◽  
Xingang Wang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
High Entropy Alloy ◽  
Matrix Composites ◽  
High Entropy ◽  
Alloy Particles

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.

Microstructure inhomogeneity of as-cast high-entropy alloy and heat treatment improvement

2019 ◽  
Vol 35 (14) ◽  
pp. 1749-1755
Author(s):  
Zhi-Sheng Nong ◽  
Zu-Ping Zhang ◽  
He-Nan Wang ◽  
Xi-Guang Deng
Keyword(s):  
Heat Treatment ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Treatment Improvement

scholarly journals Phase and Structural Changes during Heat Treatment of Additive Manufactured CrFeCoNi High-Entropy Alloy

2021 ◽  
pp. 161495
Author(s):  
Yulia O. Kuzminova ◽  
Egor A. Kudryavtsev ◽  
Jae-Kyung Han ◽  
Megumi Kawasaki ◽  
Stanislav A. Evlashin
Keyword(s):  
Heat Treatment ◽  
Structural Changes ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Phase And Structural Changes

Effect Of Heat Treatment On Microstructure And Properties of High Entropy Alloy Reinforced Titanium Metal Matrix Composites

2019 ◽  
Vol 18 ◽  
pp. 2409-2414
Author(s):  
CH.V. Satyanarayanaraju ◽  
Rahul Dixit ◽  
Pooja Miryalkar ◽  
S. Karunanidhi ◽  
A. AshokKumar ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
High Entropy Alloy ◽  
Matrix Composites ◽  
Titanium Metal ◽  
High Entropy ◽  
Microstructure And Properties
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