Effect of chromium on the formation of intermetallic phases in hot-dipped aluminide Cr–Mo steels

Cheng, Wei-Jen; Wang, Chaur-Jeng

doi:10.1016/j.apsusc.2013.04.015

Cited by 55 publications

(22 citation statements)

References 20 publications

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“…Furthermore, according to the thermodynamic principles, the standard Gibbs free energy to form Fe 2 Al 5 is higher than FeAl 3 [18], so the formation of FeAl 3 was prior to the formation of Fe 2 Al 5 . In other words, the precipitations in the cladding layer could be considered to be FeAl 3 and the bulk and needle-like structure of FeAl 3 were also in agreement with previous works [19,20]. Moreover, W and C elements were uniformly distributed in the WC particles.…”

Section: Electron Probe Micro-analyzer Mapping and X-ray Diffractionsupporting

confidence: 80%

Microstructure and Wear Behavior of Cermet/Iron Alloy Cladding Layers on A6061 Alloy Coated by Resistance Seam Welding Method

Wang

Yamaguchi

Nishio

2015

Acta Metall. Sin. (Engl. Lett.)

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Cermet/iron alloy cladding layers were coated on the surface of Al-Mg-Si alloy (A6061) plates by resistance seam welding method with tungsten carbide (WC) and high-carbon iron alloy (SHA) powders. The cladding layer consisted of WC reinforcement, SHA binder, A6061 and FeAl 3 . The effect of WC ratio (30 wt%, 50 wt% and 70 wt%) on the microstructure and wear behavior of the cladding layers was investigated in detail. Abrasive wear test was performed under two kinds of load condition by using a rubber wheel apparatus to evaluate wear resistance. The results showed that the wear resistance of the cladding layer was improved by 3.5-5 times than that of the substrate. At lower load, the wear resistances of the samples 30% and 70% WC were nearly the same, which suggested that FeAl 3 played an important role in improvement of the wear resistance instead of WC. While at higher load, the amount of WC determined the wear resistance of the cladding layer. Furthermore, wear behavior of these cladding layers was explained with reference to the observed microstructure of the worn surface.

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Section: Electron Probe Micro-analyzer Mapping and X-ray Diffractionsupporting

confidence: 80%

Microstructure and Wear Behavior of Cermet/Iron Alloy Cladding Layers on A6061 Alloy Coated by Resistance Seam Welding Method

Wang

Yamaguchi

Nishio

2015

Acta Metall. Sin. (Engl. Lett.)

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“…In short, the main alloying element Cr was involved in the thermal diffusion process of Fe and Al atoms during aluminization. A similar phenomenon was also observed in hot-dipped aluminide Cr-Mo steels [37]. Besides, the Cr content in aluminide coatings increased with the Cr concentration in steel substrates, which was quite expected.…”

Section: Aluminization Of Al Coatingsupporting

confidence: 79%

Effect of Steel Substrates on the Formation and Deuterium Permeation Resistance of Aluminide Coatings

et al. 2019

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The effect of steel substrates on the formation and deuterium permeation resistance of aluminide coatings for tritium permeation barrier applications was investigated. It was found that the average thickness and crystal structure of electrodeposited Al coatings varied with Cr steel substrates. After aluminization in vacuum, significant differences existed in the composition and thickness of (Fe,Cr) 2 Al 5 -type aluminide layers formed on different Cr steel substrates, in which the alloying element Cr from steel substrates was involved. Thereafter, the scale microstructural feature and thickness also changed with the Cr steel substrate after selective oxidation in an Ar gas stream. Consequently, the deuterium permeation resistance of the formed aluminide tritium permeation barriers (TPBs) differed by steel substrates, indicating that the substrate effect existed in aluminide TPB coatings and thus could have a significant influence on the formation and eventual performance of aluminide TPBs.

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“…Moreover, Boulesteix et al have shown the presence of a Cr segregation at the interface between the interdiffusion zone and the substrate [20], that can act as a diffusion barrier for the compounds contained in the substrate [41].…”

Section: Aluminised P92 Ferritic-martensitic Steelmentioning

confidence: 99%

Steam oxidation of aluminide coatings under high pressure and for long exposures

2018

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B2-FeAl-based aluminide coatings were elaborated on P92 ferritic-martensitic steels by slurry. Under atmospheric pressure of steal and 650°C, a thin protective α-Al 2 O 3 oxide layer formed and was maintained until 5000 h. With increasing pressure to 300 bar, the morphology of α-Al 2 O 3 changed markedly. Iron oxide clusters started to appear at the surface of the scale after 5000 h of exposure and kept on growing till 10000 h. It appears that pressure increased the outward diffusion of Fe through the coating and through the oxide scale and fostered the propagation of the tensile cracks of the coating.

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Effect of chromium on the formation of intermetallic phases in hot-dipped aluminide Cr–Mo steels

Cited by 55 publications

References 20 publications

Microstructure and Wear Behavior of Cermet/Iron Alloy Cladding Layers on A6061 Alloy Coated by Resistance Seam Welding Method

Microstructure and Wear Behavior of Cermet/Iron Alloy Cladding Layers on A6061 Alloy Coated by Resistance Seam Welding Method

Effect of Steel Substrates on the Formation and Deuterium Permeation Resistance of Aluminide Coatings

Steam oxidation of aluminide coatings under high pressure and for long exposures

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