Effect of Cu on oxidation behaviour of FCC Fe-Ni-Cr-Al and Ni-Cr-Al based alloys

Hayashi, Shigenari; Kudo, Daiki; Nagashima, Ryouta; Utsumi, Haruki

doi:10.1016/j.corsci.2019.108273

Cited by 23 publications

(8 citation statements)

References 33 publications

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“…It was reported that Cu could reduce the critical Al content in FCC matrix alloys. 28) Therefore, the excellent oxidation performance by formation of an external protective Al 2 O 3 scale on HEAs might be attributed to higher Cu content in the alloy.…”

Section: Elemental Distribution Of Oxide Scalesmentioning

confidence: 99%

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Oxidation Behavior of Cu-Containing Concentrated Solid Solution Alloys under Steam Conditions

Hashimoto

Hayashi

et al. 2021

Mater. Trans.

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The oxidation behavior of CuNi, CuFeNi, CrCu 0.3 FeNi, and Al 0.4 CrCuFeNi 2 Co-free Cu-containing concentrated solid solution alloys was investigated in steam conditions under 500, 600, and 700°C for 25 h. All the alloys have a face-centered cubic structure. The kinetic curves of oxidation were measured, and the microstructure and elemental distribution of oxide scales were analyzed. The oxidation of all the Cucontaining alloys indicated parabolic behavior, and those appeared to have better corrosion resistance than normal 316 SS. The parabolic rate constant increased with increasing temperature. The oxidation resistance of CuNi and CuFeNi were relatively poor due to the formation of unprotective NiO and Fe 3 O 4 oxide scales, which were thicker than that of CrCu 0.3 FeNi and Al 0.4 CrCuFeNi 2 at all testing temperatures. Crosssectional electron probe microanalysis (EPMA) and X-ray diffraction (XRD) results revealed that, by the addition of Cr and Al, CrCu 0.3 FeNi and Al 0.4 CrCuFeNi 2 had the enhanced oxidation resistance, which is probably due to the formation of Cr 2 O 3 and Al 2 O 3 inner oxide layer.

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Section: Elemental Distribution Of Oxide Scalesmentioning

confidence: 99%

“…26,27) Recent research also found that Cu addition was beneficial to enhance the formation of external Al 2 O 3 scale on both the Fe and Ni-based FCC alloys. 28) Therefore, the oxidation performance of Cu-containing CSSAs and HEAs must be properly estimated.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of Cu-Containing Concentrated Solid Solution Alloys under Steam Conditions

Hashimoto

Hayashi

et al. 2021

Mater. Trans.

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“…The development of suitable materials that could help to prolong production operations in these types of conditions is thus important from both an industrial and an environmental point of view. As a result, recent research developments have identified that viable options that have the potential to offer the best resistance to aggressive MD environments via coating are: (i) the introduction of alloying elements that are able to form protective oxides, such as chromium (Cr), aluminium (Al), and silicon (Si), to the nickel based alloys; (ii) the inhibition of the catalytic effect of iron (Fe), nickel (Ni), and cobalt (Co) on the formation of solid carbon from the gas phase through the addition of copper (Cu) and tin (Sn); and (iii) the development of high-entropy alloys as coatings [5]. These options are currently being explored globally in research and development (R&D) spaces for future industrial consideration.…”

Section: Introductionmentioning

confidence: 99%

DESIGN OF CUBIC Ni-BASED ALLOYS FOR USE AS COATING IN PETROCHEMICAL INDUSTRY – A FIRST PRINCIPLES APPROACH

Phasha

Mulaudzi²,

Möller³

2022

SAJIE

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This work presents the structural stability and mechanical properties of ordered face-centred cubic (FCC) Ni-Cr binary and ternary alloys. The effects of alloying on these properties have been evaluated using the first principles density functional theory (DFT) within generalised gradient approximation (GGA). The calculated heats of formation show that the introduction of third elements (Al, Ti, Mo, Sn) improved the thermodynamic stability of the usually unstable L12 Ni3Cr phase. Unsurprisingly, ternary alloys that yielded higher mechanical properties were those alloyed with Al and Ti owing to their ability to form a very stable L12 phase with Ni. Therefore, the theoretical technique has been successfully employed to identify promising high-strength cubic Ni-based ternary intermetallic alloys that can be used as coatings.

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“…[ 14 ] Elements such as Nb, Y, V, Zr, Hf, Ce, Cu, Ti, and Ta have been added to investigate their effects on the oxidation behavior of AFA alloys, and many of these elements play an important role in the oxidation resistance. [ 15–19 ] Due to its influence on the oxide scale evolution, Nb is regarded as a good candidate to improve the elevated temperature oxidation resistance.…”

Section: Introductionmentioning

confidence: 99%

“…resistance. [15][16][17][18][19] Due to its influence on the oxide scale evolution, Nb is regarded as a good candidate to improve the elevated temperature oxidation resistance.…”

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confidence: 99%

Roles of Nb on the oxidation characteristics and oxide scale evolution of Fe‐25Cr‐35Ni‐2.5Al‐_XNb alloys at 1000°C and 1100°C

Jia

Pan

et al. 2022

Materials & Corrosion

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The oxidation characteristics of Fe-25Cr-35Ni-2.5Al-X Nb (0, 0.6, and 1.2 wt%) alumina-forming austenitic alloys at 1000°C and 1100°C in air were investigated. Results show that Nb has an important effect on the hightemperature oxidation resistance. A bilayer oxide scale with a Cr 2 O 3 -rich outer layer and Al 2 O 3 -rich internal layer forms on the surface of the Nb-free alloy and exhibits a poor oxidation resistance at 1000°C and 1100°C. With Nb addition, both the 0.6Nb-addition and 1.2Nb-addition alloys exhibit better oxidation resistance at 1000°C. Because of the third element effect, Nb addition reduces the critical Al content and forms a single external protective Al 2 O 3 scale, which greatly improves the oxidation resistance. After oxidation at 1100°C, niobium oxides (mainly Nb 2 O 5 ) are formed on the surface of the 1.2Nb-addition alloy and destroy the integrity of the Al 2 O 3 scale, which causes the formation of Cr-rich oxide nodules and eventually develops to be a loose bilayer oxide scale with NiCr 2 O 4 , Cr 2 O 3 , and Fe 2 O 3 outer layers and Al 2 O 3 inner layer. K E Y W O R D S AFA alloys, Al 2 O 3 scale, high-temperature oxidation, Nb addition, Nb oxide | INTRODUCTIONIncoloy 800 is a typical Cr 2 O 3 -forming Ni-Fe-Cr-based alloy that has excellent oxidation resistance and creeprupture properties in the range of specified temperatures. [1][2][3] Incoloy 800 is widely used in furnace components and equipment, petrochemical furnace cracker tubes, and nuclear reactors. [2,4] However, when oxidizing at higher temperatures or water vapor conditions, the Cr 2 O 3 scale will evaporate and lose its protective effect on the matrix. [5][6][7][8] To solve this type of limitation of chromia-forming alloys, the Oak Ridge National Laboratory invented special alloys named alumina-forming austenitic (AFA) alloys. [9,10] AFA alloys can form a stable protective alumina (Al 2 O 3 ) scale, which offers excellent oxidation resistance at high temperatures. [5,11,12] Thus, AFA alloys have become potential alloys for elevated temperature applications. [13] Research to promote the formation of a protective alumina scale has been ongoing for several years. First of all, Al is recognized as the key point of the AFA alloys, so enough Al is needed to form a continuous and compact Al 2 O 3 scale. [14] Elements such as Nb, Y, V, Zr, Hf, Ce, Cu, Ti, and Ta have been added to investigate their effects on the oxidation behavior of AFA alloys, and many of these elements play an important role in the oxidation

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Effect of Cu on oxidation behaviour of FCC Fe-Ni-Cr-Al and Ni-Cr-Al based alloys

Cited by 23 publications

References 33 publications

Oxidation Behavior of Cu-Containing Concentrated Solid Solution Alloys under Steam Conditions

Oxidation Behavior of Cu-Containing Concentrated Solid Solution Alloys under Steam Conditions

DESIGN OF CUBIC Ni-BASED ALLOYS FOR USE AS COATING IN PETROCHEMICAL INDUSTRY – A FIRST PRINCIPLES APPROACH

Roles of Nb on the oxidation characteristics and oxide scale evolution of Fe‐25Cr‐35Ni‐2.5Al‐_XNb alloys at 1000°C and 1100°C

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Effect of Cu on oxidation behaviour of FCC Fe-Ni-Cr-Al and Ni-Cr-Al based alloys

Cited by 23 publications

References 33 publications

Oxidation Behavior of Cu-Containing Concentrated Solid Solution Alloys under Steam Conditions

Oxidation Behavior of Cu-Containing Concentrated Solid Solution Alloys under Steam Conditions

DESIGN OF CUBIC Ni-BASED ALLOYS FOR USE AS COATING IN PETROCHEMICAL INDUSTRY – A FIRST PRINCIPLES APPROACH

Roles of Nb on the oxidation characteristics and oxide scale evolution of Fe‐25Cr‐35Ni‐2.5Al‐XNb alloys at 1000°C and 1100°C

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Roles of Nb on the oxidation characteristics and oxide scale evolution of Fe‐25Cr‐35Ni‐2.5Al‐_XNb alloys at 1000°C and 1100°C