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

Laser Assisted High Entropy Alloy Coating on Low Carbon Steel

2019 ◽  
Vol 813 ◽  
pp. 159-164
Author(s):  
Carlos Alberto Souto ◽  
Gustavo Faria Melo da Silva ◽  
Laura Angelica Ardila Rodriguez ◽  
Aline C. de Oliveira ◽  
Kátia Regina Cardoso
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
High Hardness ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
Nominal Composition ◽  
Low Carbon ◽  
High Entropy ◽  
Scan Speed

Coatings with high entropy alloys of the AlCoCrFeNiV system were obtained by selective laser melting on low carbon steel substrates. The effect of the variation of the Fe and V contents as well as the laser processing parameters in the development of the coating were evaluated. The coatings were obtained from the simple powder mixtures of the high purity elemental components in a planetary ball mill. The coatings were obtained by using CO2 laser with a power of 100 W, diameter of 0.16 mm, and scan speed varying from 3 to 12 mm/s. Phase constituents, microstructure and hardness were investigated by XRD, SEM, and microhardness tester, respectively. Wear resistance measurements were carried out by the micro-abrasion method using ball-cratering tests. The coatings presented good adhesion to the substrate and high hardness, of the order of 480 to 650 HV. Most homogeneous coating with nominal composition was obtained by using the higher scan speed, 12 mm/s. Vanadium addition increased hardness and gave rise to a high entropy alloy coating composed by BCC solid solutions. Ball cratering tests conducted on HEA layer showing improvement of material wear resistance, when compared to base substrate, decreasing up to 88% its wear rate, from 1.91x10-6 mm3/Nmm to 0.23x10-6 mm3/Nmm.

Rapid fabrication of the continuous AlFeCrCoNi high entropy alloy coating on aluminum alloy by resistance seam welding

2020 ◽  
Vol 517 ◽  
pp. 145980 ◽  
Author(s):  
Dechao Zhao ◽  
Tomiko Yamaguchi ◽  
Jinfeng Shu ◽  
Tatsuya Tokunaga ◽  
Tsubasa Danjo
Keyword(s):  
Aluminum Alloy ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
Seam Welding ◽  
High Entropy ◽  
Rapid Fabrication
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