Structure and high-temperature property of amorphous composite coating synthesized by laser cladding FeCrCoNiSiB high-entropy alloy powder

Shu, Fengyuan; Liu, S.; Zhao, Hongyun; He, Wenxiong; Sui, Shaohua; Zhang, J.; He, Peng; Xu, Ben-Qi

doi:10.1016/j.jallcom.2017.08.248

Cited by 105 publications

(18 citation statements)

References 25 publications

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“…However, it is not clear, whether HEAs can be successfully laser beam welded. Recently, laser-based processes were only investigated for cladding of HEAs, where the main emphasis was given to production coatings with advanced properties [43][44][45][46], while laser welding has received rather limited attention [41]. Therefore the effect of fiber laser beam welding on the structure and hardness of the CoCrFeNiMn-type HEA was reported in the present study.…”

Section: Introductionmentioning

confidence: 93%

Laser beam welding of a CoCrFeNiMn-type high entropy alloy produced by self-propagating high-temperature synthesis

et al. 2018

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Section: Introductionmentioning

confidence: 93%

Laser beam welding of a CoCrFeNiMn-type high entropy alloy produced by self-propagating high-temperature synthesis

et al. 2018

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“…Due to the non-equilibrium process in the MA process, metastable supersaturated solid solutions formed more easily. So with the improvement of laser power, the heat input per unit area also increased rapidly, which promoted a more stable phase to form and reduce defects caused in MA [4,28,29]. Figure 5 illustrates the variation law of the microhardness of AlCoCrFeNiTi HEACs along the depth of the cross section.…”

Section: Microstructure Of the Alcocrfeniti Heacsmentioning

confidence: 99%

Phase Evolution, Microstructure and Mechanical Property of AlCoCrFeNiTi High-Entropy Alloy Coatings Prepared by Mechanical Alloying and Laser Cladding

Wang

et al. 2019

Metals

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AlCoCrFeNiTi high-entropy alloy coatings (HEACs) were prepared by mechanical alloying (MA) and laser cladding (LC) process on H13 hot-working die steel substrate. Phase evolution, microstructure, and mechanical properties of the alloyed powder and HEACs were investigated in detail. The final milling AlCoCrFeNiTi coating powders exhibited simple body centered cubic (BCC) phase and mean granular size of less than 4 μm. With the increase of heat input of the laser, partial BCC phase transformed into minor face centered cubic (FCC) phase during LC. AlCoCrFeNiTi HEACs showed excellent metallurgical bonding with the substrate, and few defects. Moreover, the microhardness of AlCoCrFeNiTi HEACs reached 1069 HV due to the existence of the hard oxidation and the second phase grains, which are about five times that of the substrate. The laser surface cladding HEACs exhibited deteriorated tensile property compared with that of the substrate and the fracture generally occurred in the region of HEACs. The fracture mechanism of AlCoCrFeNiTi HEACs was dominated by the comprehensive influence of brittle fracture and ductile fracture.

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“…It is indicated that within the crystallized region, due to the melting of the substrate at the interface, the composition of the cladding layer was diluted by the substrate, and the elemental composition in this region deviated from the nominal composition of the amorphous alloy. In the laser cladding process, the key factors affecting the glass forming ability are the cooling rate and the composition of the cladding layer [22]. The dilution of the nominal composition near the bond zone will reduce the glass forming ability and favor the growth of the crystalline phase.…”

Section: Phase and Microstructurementioning

confidence: 99%

Microstructure and Wear Resistance of Fe-Cr-Mo-Co-C-B Amorphous Composite Coatings Synthesized by Laser Cladding

Hou

Wang

et al. 2018

Metals

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A novel amorphous composite coating was synthesized successfully on 3Cr13 stainless steel by laser cladding Fe-Cr-Mo-Co-C-B amorphous alloy powder. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD) were used to analyze the microstructure, composition, and phase structure of the coatings. Hardness and friction wear testers were used to analyze the hardness and wear resistance of the coatings. Results show that the cladding layer has an amorphous/crystalline composite structure, which is composed of a columnar grain region at the bottom and an amorphous region in the upper layer. The solute redistribution between the coating and the substrate in the bonding zone and the lower cooling rate at bottom account for the occurrence of crystallization. The highest hardness of the cladding layer is 1179 HV0.5, which is about 6 times that of the 3Cr13 stainless steel substrate (200 HV0.5). The cladding layer greatly improves the wear resistance of the substrate with a much lower coefficient of friction and wear mass loss compared with the substrate.

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Structure and high-temperature property of amorphous composite coating synthesized by laser cladding FeCrCoNiSiB high-entropy alloy powder

Cited by 105 publications

References 25 publications

Laser beam welding of a CoCrFeNiMn-type high entropy alloy produced by self-propagating high-temperature synthesis

Laser beam welding of a CoCrFeNiMn-type high entropy alloy produced by self-propagating high-temperature synthesis

Phase Evolution, Microstructure and Mechanical Property of AlCoCrFeNiTi High-Entropy Alloy Coatings Prepared by Mechanical Alloying and Laser Cladding

Microstructure and Wear Resistance of Fe-Cr-Mo-Co-C-B Amorphous Composite Coatings Synthesized by Laser Cladding

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