Fracture and wear mechanisms of FeMnCrNiCo + x(TiC) composite high-entropy alloy cladding layers

FeCoCrNiMnAlx high-entropy alloy (HEA) cladding layers were successfully fabricated on H13 steel by laser cladding. The microstructure and properties of the FeCoCrNiMnAlx HEA cladding layers were systematically studied. The influence of Al content on high-temperature wear resistance of HEAs was investigated by depth-of-field microscopy, XRD, SEM and EDS. Addition of Al element affected the mechanism of oxidation and strengthening of the cladding layers, and effectively promoted its anti-oxidant and abrasion resistance. Compared with the FeCoCrNiMn cladding layer, the FeCoCrNiMnAl0.75 cladding layer enhanced the anti-plastic deformation capacity by 7.1% and reduced oxidation weight gain and total wear weight loss at high temperature by 36.79% and 79.0%, respectively. The wear mechanisms of the cladding layer at high temperature were mainly oxidation wear and abrasive wear, while adhesive wear took a backseat.

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Evolution mechanisms of TiC ceramic particles in FeCoCrNiAl high-entropy alloy laser cladding layers

Materials Research Express ◽

10.1088/2053-1591/ab405d ◽

2019 ◽

Vol 6 (10) ◽

pp. 1065d2 ◽

Cited By ~ 1

Author(s):

Yangchuan Cai ◽

Sansan Ao ◽

Sunusi Marwana Manladan ◽

Jichao Xue ◽

Zhen Luo

Keyword(s):

Laser Cladding ◽

High Entropy Alloy ◽

Ceramic Particles ◽

High Entropy ◽

Cladding Layers

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Instant and Persistent Hydrogen Production Using Nano High Entropy Catalyst

10.26434/chemrxiv.9777257.v1 ◽

2019 ◽

Author(s):

Nirmal Kumar ◽

Subramanian Nellaiappan ◽

Ritesh Kumar ◽

Kirtiman Deo Malviya ◽

K. G. Pradeep ◽

...

Keyword(s):

Formic Acid ◽

Minimum Energy ◽

High Entropy Alloy ◽

Hydrogen Energy ◽

High Entropy ◽

Electro Oxidation ◽

The Individual ◽

Novel Catalyst ◽

Cell Anode ◽

Fuel Cell Anode

<div>Renewable harvesting clean and hydrogen energy using the benefits of novel multicatalytic materials of high entropy alloy (HEA equimolar Cu-Ag-Au-Pt-Pd) from formic acid with minimum energy input has been achieved in the present investigation. The synthesis effect of pristine elements in the HEA drives the electro-oxidation reaction towards non-carbonaceous pathway . The atomistic simulation based on DFT rationalize the distinct lowering of the d-band center for the individual atoms in the HEA as compared to the pristine counterparts. This catalytic activity of the HEA has also been extended to methanol electro-oxidation to show the unique capability of the novel catalyst. The nanostructured HEA, properties using a combination of casting and cry omilling techniques can further be utilized as fuel cell anode in direct formic acid/methanol fuel cells (DFFE).<br></div>

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