Influence of copper and aluminum substitution on high‐temperature oxidation of the FeCoCrNiMn “Cantor” alloy

Bürckner, Mary‐Lee; Mengis, Lukas; White, Emma; Galetz, Mathias C.

doi:10.1002/maco.202213382

Cited by 6 publications

(14 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The as-solidified chemical compositions and microstructures were previously determined and discussed and are listed in Table 1 [24,25].…”

Section: Resultsmentioning

confidence: 99%

“…Table 1. Chemical compositions in wt.% (from EDS) and microstructural descriptions of the investigated Al-and Cu-containing HEAs (adapted from [24,25]).…”

Section: Resultsmentioning

confidence: 99%

“…The single phase FCC Cantor composition has been extensively discussed in terms of dry air oxidation resistance elsewhere [6,7,9,11,12,25] and so is only briefly included as a baseline in the current study. HEA+Mn forms a thick oxide at 800 • C for up to 500 h as seen in Figure 1.…”

Section: Cantor (Hea+mn)mentioning

confidence: 99%

“…At 620 • C in a low-oxygen partial pressure atmosphere, the Alcontaining alloys had thermally grown Al 2 O 3 or Cr 2 O 3 scales and effectively inhibited carbon ingress [24]. These alloys, plus the Cantor composition for comparison, were also studied at higher temperatures of 600-800 • C for up to 500 h in synthetic air to elucidate their oxidation mechanisms [25]. Of even further scientific and industrial interest is the performance of this set of transition metal HEAs under humid atmospheres.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

High-Temperature Oxidation Behavior of FeCoCrNi+(Cu/Al)-Based High-Entropy Alloys in Humid Air

White,

Bürckner,

Schlereth

et al. 2023

Crystals

View full text Add to dashboard Cite

Previous studies showed some transition metal high-entropy alloy (HEA) compositions can have good oxidation resistance in air up to 800 °C. Four equiatomic HEAs have been developed based on FeCoCrNi with additions of Mn, Cu, Al or Al+Cu. The oxidation behavior of these HEAs was compared in humid (10 vol.% H2O) air at 800 °C for 100–500 h to investigate the influence of water vapor on the oxidation mechanisms. The Cu- and Al-containing alloys exhibited improved oxidation resistance over the Mn composition. For the Cu-containing alloy, a local attack of the Cu-rich phase was observed, which formed an Fe/Ni/Co/Cr spinel that was surrounded by Cr2O3. This oxide was thicker for the humid air atmosphere when compared to dry air, and the transition of the Cu oxide to the spinel was accelerated. The Al-containing HEA formed a thin Al2O3 scale with humidity suppressing AlN formation and forming a smoother oxide layer. The Al+Cu composition had the highest overall oxidation resistance (minimal local attack, no nitridation) and also showed a smooth oxide scale topography under humid air oxidation as opposed to a plate-like, rougher scale under dry air.

show abstract

“…The as-solidified chemical compositions and microstructures were previously determined and discussed and are listed in Table 1 [24,25].…”

Section: Resultsmentioning

confidence: 99%

“…Table 1. Chemical compositions in wt.% (from EDS) and microstructural descriptions of the investigated Al-and Cu-containing HEAs (adapted from [24,25]).…”

Section: Resultsmentioning

confidence: 99%

Section: Cantor (Hea+mn)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-Temperature Oxidation Behavior of FeCoCrNi+(Cu/Al)-Based High-Entropy Alloys in Humid Air

White,

Bürckner,

Schlereth

et al. 2023

Crystals

View full text Add to dashboard Cite

show abstract

“…The oxidation behavior of equimolar CoCrFeMnNi alloys was earlier explored at temperature ranging from 500 to 800 °C, for example by Laplanche et al [14], Stephan-Scherb et al [15] or Bürckner et al [16]. In contrast, there are seemingly very few oxidation studies which were carried out at temperatures beyond 1000 °C.…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric Study of the Oxidation Behavior of the Cantor’s Alloy at 1000 °C and Beyond

Berthod,

Aranda

2024

High-Temperature Materials

View full text Add to dashboard Cite

A polycrystalline Cantor alloy, equimolar in Co, Cr, Fe, Mn and Ni, was cast. It was subjected to oxidation in a thermo-balance in a flow of synthetic dry air, at 1000, 1050, 1100 and 1150 °C. The mass gain was globally parabolic but rather irregular. The parabolic constants, ranging from 55 to 700 × 10 −12 • g 2 • cm −4 • s −1 , are much higher than for a chromia-forming alloy. They obey an Arrhenius law with an activation energy equal to 270 kJ/mol. The external oxide scales formed are composed of an outer part made of manganese oxide and an inner part made of (Cr,Mn) oxide containing a thin internal layer of chromia. The Mn and Cr-depleted depths and the Mn and Cr masses lost by the alloy increase with the oxidation temperature. Cr-rich acicular particles precipitated in subsurface at 1100 °C and internal oxidation along the grain boundaries are present in the whole thickness of the sample oxidized at 1150 °C. Oxide spallation occurred during the cooling, at temperatures in the 200-350 °C range, only for the alloys oxidized at 1050 and 1100 °C. Not too thick scale (1000 °C) or deep internal oxidation (1150 °C) may be favorable for scale adherence.

show abstract

Oxidation properties of complex concentrated alloys FeAlCrV and FeAlCrMo

Jača,

Hotař,

Pešička

et al. 2023

J Mater Sci

View full text Add to dashboard Cite

Complex concentrated alloys (CCAs) are attracting considerable interest due to their potential applications under extreme conditions. This study focuses on two complex concentrated alloys, the FeAlCrV and the FeAlCrMo alloys, which already exhibited exceptional mechanical properties at high temperatures. In this regard, room temperature corrosion resistance and high-temperature oxidation were studied to investigate their potential applicability in harsh environments. It is shown that the corrosion resistance of both CCAs is much higher than that of AISI 304 and P91 steels in 0.5 M H2SO4 solution, while in 3.5% NaCl solution was comparable. On the contrary, high-temperature oxidation of CCAs was unsatisfactory, especially exceeding 700 °C. The intensive analysis of the formed oxide scales revealed that the protective oxide layer is not being formed at temperatures above 700 °C, primarily because of the occurrence of vanadium corrosion (FeAlCrV) and evaporation of Mo oxides (FeAlCrMo). The results of this study unambiguously showed the importance of studying oxidation properties at high temperatures parallel with the mechanical properties for the development of CCAs for cutting-edge technical applications.

show abstract

Influence of copper and aluminum substitution on high‐temperature oxidation of the FeCoCrNiMn “Cantor” alloy

Cited by 6 publications

References 26 publications

High-Temperature Oxidation Behavior of FeCoCrNi+(Cu/Al)-Based High-Entropy Alloys in Humid Air

High-Temperature Oxidation Behavior of FeCoCrNi+(Cu/Al)-Based High-Entropy Alloys in Humid Air

Thermogravimetric Study of the Oxidation Behavior of the Cantor’s Alloy at 1000 °C and Beyond

Oxidation properties of complex concentrated alloys FeAlCrV and FeAlCrMo

Contact Info

Product

Resources

About