Direct laser deposition cladding of Al CoCrFeNi high entropy alloys on a high-temperature stainless steel

Chao, Qi; Guo, Tingting; Jarvis, Tom; Wu, Xinhua; Hodgson, Peter; Fabijanic, Daniel

doi:10.1016/j.surfcoat.2017.09.072

Cited by 147 publications

(39 citation statements)

References 49 publications

(119 reference statements)

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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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“…In the case of DLD, the powder size range utilized is between 50 μm and 150 μm and thus is comparatively larger than the powder size range used in the SLM process (10 μm to 50 μm). [34][35] The laser used for DLD is typically an Nd:YAG diode or CO 2 laser, while the metal powder is fed through a coaxial or multijet nozzle. 36 In order to maintain an inert atmosphere, an argon shielding gas may be introduced via the powder feed as shown in Figure 1(b).…”

Section: Metal Additive Manufacturingmentioning

confidence: 99%

Corrosion of Additively Manufactured Alloys: A Review

et al. 2018

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Additive manufacturing (AM), often termed 3D printing, has recently emerged as a mainstream means of producing metallic components from a variety of metallic alloys. The numerous benefits of AM include net shape manufacturing, efficient use of material, suitability to low volume production runs, and the ability to explore alloy compositions not previously accessible to conventional casting. The process of AM, which is nominally performed using laser (or electron) based local melting, has a definitive role in the resultant alloy microstructure. Herein, the corrosion of alloys prepared by AM using laser and electronbased methods, relating the corrosion performance to the microstructural features influenced by AM processing, are reviewed. Such features include unique porosity, grain structures, dislocation networks, residual stress, solute segregation, and surface roughness. Correlations between reported results and deficiencies in present understanding are highlighted.

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“…However, the present investigations in terms of HEAs mainly focus on the component optimization in different bulk HEAs prepared by the melting method. Some multicomponent systems have been explored (CrMnFeCoNi [27,28], CoCrCuFeNi [29,30], AlCoCrFeNi [31,32], AlCoCrFeNiTi [33,34] and so on [35,36]), among which AlCoCrFeNiTi attracts more attentions due to its higher plasticity/toughness, hardness and excellent corrosion resistance.However, there are few reports about the AlCoCrFeNiTi coatings prepared on titanium alloys (especially by laser cladding). Moreover, Cr as a main corrosion-resistant component in HEAs plays an essential role in improvement of corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Investigation into corrosion and wear behaviors of laser-clad coatings on Ti6Al4V

Zhang

Jiang

et al. 2020

Mater. Res. Express

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TiAlCoCr x FeNihigh-entropy alloys (HEAs) coatings were fabricated on the surface of Ti6Al4V by laser cladding. Their microstructural evolution with the increase in x value (x=0, x=1.0, x=2.0) was investigated in detail. Besides that, the investigation into the effects of the Cr content on their corrosion behaviors and mechanical properties (in terms of hardness and wear resistance) was also carried out comprehensively. The results indicated that two kinds of phases (a solid solution with thehexagonal close-packed (HCP) structureand Ti 2 Ni) were synthesized in the coatings, and the HCP content was gradually increased with the increase in x accompanied with the decrease in Ti 2 Ni content. A HEA coating only composed of single HCP was successfully prepared when x reached 2.0. The electrochemical and immersion tests all confirmed that the coating with x=2.0demonstrated the most excellent corrosion resistance in a0.1 mol·L −1 HCl solution from different aspects including corrosion tendency and corrosion rate without the applied potential, the formation difficult/stability of the passive film and the dissolution rate in the passive state, and corrosion surface morphology. The averagemicrohardness values of the coatings weregraduallyincreasedfrom 656HV 0.2 to 800 HV 0.2 with increasing xfrom 0 to 2.0, which wereabout double that of the substrate (350 HV 0.2 ). Wear resistance of the coatings also exhibited the upward tendency with increasing the x values (0.562 mm 3 at x=2.0, 0.640 mm 3 at x=1.0, 0.641 mm 3 at x=0 and 1.419 mm 3 for the substrate). More Cr addition into the cladding material will contribute to the formation of a HEA coating composed of single HCPwith excellent corrosion and wear resistance.

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Direct laser deposition cladding of Al CoCrFeNi high entropy alloys on a high-temperature stainless steel

Cited by 147 publications

References 49 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

Corrosion of Additively Manufactured Alloys: A Review

Investigation into corrosion and wear behaviors of laser-clad coatings on Ti6Al4V

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