Effect of Ti content on structure and properties of Al2CrFeNiCoCuTix high-entropy alloy coatings

Qiu, Xingwu; Zhang, Y.P.; Liu, C.G.

doi:10.1016/j.jallcom.2013.09.083

Cited by 196 publications

(61 citation statements)

References 20 publications

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“…Compared with the Q235 steel, the corrosion current density was reduced by 1-2 orders of magnitude. The corrosion resistance of the Al 2 CrFeCoCuNiTi x HEA coatings was enhanced in 0.5 M HNO 3 solutions by increasing the Ti content [53]. However, with the increase of the Ni content, the corrosion resistance first increased and then decreased in the 0.6 M NaCl [54].…”

Section: Coating By Laser Claddingmentioning

confidence: 94%

“…The Al x CoCrCuFeNi coatings possessed better corrosion resistance than the 314 L stainless steel (18 wt % Cr, 9 wt % Ni, 1 wt % Si, 2 wt % Mn) in the 0.05 mol/L HCl [52]. Qiu et al studied the effects of Ti and Ni contents on the corrosion behavior of the Al 2 CoCrCuFeNiTi x and Al 2 CoCrCuFeTiNi x coatings deposited on Q235 carbon steel (0.17 wt % C, 0.30 wt % Si, 0.35-0.80 wt % Mn) [53,54]. The HEA coatings consisted of cladding, bounding, and heat-affected zones.…”

Section: Coating By Laser Claddingmentioning

confidence: 99%

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Corrosion-Resistant High-Entropy Alloys: A Review

Shi

Yang

Liaw

2017

Metals

684

205

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Corrosion destroys more than three percent of the world's gross domestic product. Therefore, the design of highly corrosion-resistant materials is urgently needed. By breaking the classical alloy-design philosophy, high-entropy alloys (HEAs) possess unique microstructures, which are solid solutions with random arrangements of multiple elements. The particular locally-disordered chemical environment is expected to lead to unique corrosion-resistant properties. In this review, the studies of the corrosion-resistant HEAs during the last decade are summarized. The corrosion-resistant properties of HEAs in various aqueous environments and the corrosion behavior of HEA coatings are presented. The effects of environments, alloying elements, and processing methods on the corrosion resistance are analyzed in detail. Furthermore, the possible directions of future work regarding the corrosion behavior of HEAs are suggested.

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Section: Coating By Laser Claddingmentioning

confidence: 94%

Section: Coating By Laser Claddingmentioning

confidence: 99%

Corrosion-Resistant High-Entropy Alloys: A Review

Shi

Yang

Liaw

2017

Metals

684

205

View full text Add to dashboard Cite

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“…49,50 Qiu et al found many Ti-rich nanocrystals distributed inside the equiaxed grains in the Al 2 CrFeCoCuTiNi 1.5 coating, which was mainly composed of simple solid-solution phases, as shown in Fig. 6c and d. 46 Ye et al 36 found Widmanstaten precipitates of about 30 nm in length in the Al 1.3 FeCoNiCuCr coating.…”

Section: Nanoscale Precipitatesmentioning

confidence: 99%

“…A columnar-to-equiaxed growth transition takes place when the nucleation of equiaxed grains occurs in the liquid ahead of the columnar zone, and this transition is always controlled by the ratio of the temperature gradient (G) to crystal growth velocity (V s ). 46 Figure 3 presents a schematic of the longitudinal cross-section along the clad centerline, showing the laser melting process and the evolution of V s and G along the solid/liquid interface. The velocity of isotherms V s depends on the location and is linked to the heat source velocity (i.e., laser scanning velocity V v ) along the centerline.…”

Section: Columnar-to-equiaxed Crystal Transitionmentioning

confidence: 99%

“…The lengths of columnar grain in the FeCoNiCrCu 38 and Al 2 CrFeNiCoCuTi 0.54 6 coatings were much shorter than those in conventional alloy coatings. Figure 4 even shows that the rapid directionally solidified dendrites or columnar grains almost disappeared and were replaced by equiaxed grains near the bonding areas in the Fe 6 CoNiCr AlTiSi, 49 Al 2 CrFeCoCuTiNi 1.5 , 46 and FeCoNiCrCu TiMoAlSiB 0.5 coatings. 50 The difference in the CET mechanism for HEA coatings should originate from the unique compositions and melt features of HEAs.…”

Section: Columnar-to-equiaxed Crystal Transitionmentioning

confidence: 99%

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Application Prospects and Microstructural Features in Laser-Induced Rapidly Solidified High-Entropy Alloys

Zhang

et al. 2014

JOM

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Recently, high-entropy alloys (HEAs) have attracted much interest in the materials community, as they offer massive opportunities to observe new phenomena, explore new structure, and develop new materials. Particularly, it is attractive to prepare high-performance HEA coatings by laser-induced rapid solidification, which can be formed on the surface of components and parts in a variety of sizes and shapes with a lower cost in comparison with those bulk material fabrication methods. From the technical point of view, laser-induced rapid solidification could hamper the compositional segregation, improve the solubility in solid-solution phases, and lead to the strengthening effect by the grain refinement. This article reviews the recent work on the typical microstructural features and the mechanical and chemical properties in laser-induced rapidly solidified HEAs, and these data are compared with conventional Co-and Ni-based alloy coatings. The article concludes with suggestions for future research and development in HEAs, from considerations of their characteristic properties.

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A Review on High Entropy Alloys Coatings: Fabrication Processes and Property Assessment

et al. 2019

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Surface coatings can enhance the mechanical and functional properties of substrates and keep good balance between specific mechanical properties and sufficient surface performance of the components. Coatings composed of high entropy alloys (HEAs) and HEA‐based materials, including metallic, ceramics, and composites have attracted the global attention and developed rapidly over the last decade, owing to their outstanding properties. Here, the authors provide a critical review of the state‐of‐the‐art for HEA‐based coatings, aiming to address the related conceptions, designing principles, microstructural, and mechanical evolutions during fabrication and post‐treatments process. The surface properties which are not limited to anti‐corrosion, anti‐radiation, and anti‐diffusion and their underlying mechanisms are analyzed. The development tendency and future applications are classified and discussed, including the basic researches about HEAs, the regulations of fabrication techniques and the exploring of functional properties of HEA‐based coatings. Due to their superior mechanical and functional potentials as well as abundant element‐constitutions of designing, surface coatings composed of HEA‐based materials are considered to have promising applications in engineering and industrial manufacturing.

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Effect of Ti content on structure and properties of Al2CrFeNiCoCuTix high-entropy alloy coatings

Cited by 196 publications

References 20 publications

Corrosion-Resistant High-Entropy Alloys: A Review

Corrosion-Resistant High-Entropy Alloys: A Review

Application Prospects and Microstructural Features in Laser-Induced Rapidly Solidified High-Entropy Alloys

A Review on High Entropy Alloys Coatings: Fabrication Processes and Property Assessment

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