CrMnFeCoNi high entropy alloys with carbon and nitrogen: mechanical properties, wear and corrosion resistance

Chmielak, L.; Roncery, L. Mujica; Niederhofer, Philipp; Weber, Sebastian; Theisen, W.

doi:10.1007/s42452-021-04814-y

Cited by 15 publications

(6 citation statements)

References 28 publications

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“…Additionally, all the systems exhibit a reduction in ductility, strength, and specific fracture energy as the temperature increases. Wear resistance at room temperature was lower than that of austenitic steels, whereas surface corrosion performance was comparable to that of reported austenitic steels [27]. In contrast to the previous results, other studies focused on the addition of small amounts of boron to the equiatomic and non-equiatomic FeMnCoCrNi Cantor alloy [28,29], finding that the material exhibits boron segregation, which has a direct effect on grain size and, as a result, stronger cohesion at the grain boundaries, without resulting in a reduction in ductility.…”

Section: Introductionsupporting

confidence: 78%

“…The alloy Fe 20 Mn 20 Co 20 Cr 20 Ni 20 , also known as the Cantor alloy, solidifies in a single FCC phase, demonstrating exceptional mechanical properties, strength, and ductility at the same time, showing a notable gap concerning conventional alloys, inclusive at cryogenic temperatures [ 22 , 23 , 24 , 25 ]. Currently, the study of HEAs has focused on the addition of non-equiatomic quantities of elements, as well as the incorporation of interstitial elements such as C, N, and B, considering that the hardening of the alloys is influenced by these components, in addition to the main elements that comprise the solid solution [ 26 , 27 , 28 , 29 , 30 ]. Chmielak et al recently investigated the addition of C and in combination with N as interstitial elements in the CrMnFeCoNi alloy, focusing on its mechanical properties from 77 K to 673 K, microstructure, corrosion resistance, and wear resistance [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

“…Currently, the study of HEAs has focused on the addition of non-equiatomic quantities of elements, as well as the incorporation of interstitial elements such as C, N, and B, considering that the hardening of the alloys is influenced by these components, in addition to the main elements that comprise the solid solution [ 26 , 27 , 28 , 29 , 30 ]. Chmielak et al recently investigated the addition of C and in combination with N as interstitial elements in the CrMnFeCoNi alloy, focusing on its mechanical properties from 77 K to 673 K, microstructure, corrosion resistance, and wear resistance [ 27 ]. In comparison to the interstitial free FeMnCoCrNi reference alloy, the addition of C and N results in an increase in yield strength and ultimate tensile strength, and a decrease in the ductility.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic and Ab Initio Design of Multicomponent Alloys Based on (Fe50Mn30Co10Cr10)-xBx (x = 0, 5, 7, 10, and 15 at.%)

Vargas-Osorio,

Torres-Mejia,

Mujica-Roncery

et al. 2023

Materials

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Multicomponent alloys have attained general interest in recent years due to their remarkable performance. Non-equiatomic alloys with boron addition as an interstitial element are being studied, exhibiting outstanding mechanical properties. In order to estimate the mechanical behavior of potential alloys, thermodynamic and ab initio calculations were utilized in this work to investigate phase stability and stacking fault energy (SFE) for (Fe50Mn30Co10Cr10)-xBx (x = 0, 5, 7, 10, and 15 at.%) systems. Thermodynamic experiments revealed two structural variations of borides, M2B(C16) with a tetragonal structure and M2B(CB) with an orthorhombic structure. Borides precipitate when boron content increases, and the FCC matrix becomes deficient in Mn and Cr. According to ab initio calculations, the presence of boron in the FCC and HCP structures primarily disrupts the surroundings of the Fe and Mn atoms, resulting in an increased distortion of the crystal lattice. This is related to the antiferromagnetic condition of the alloys. Furthermore, for alloys with a low boron concentration, the stacking fault energy was found to be near 20 mJ/m2 and greater than 50 mJ/m2 when 10 and 15 at.% boron was added. As boron concentrations increase, M2B borides are formed, generating changes in the matrix composition prone to fault-induced phase transitions that could modify and potentially impair mechanical properties.

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Section: Introductionsupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamic and Ab Initio Design of Multicomponent Alloys Based on (Fe50Mn30Co10Cr10)-xBx (x = 0, 5, 7, 10, and 15 at.%)

Vargas-Osorio,

Torres-Mejia,

Mujica-Roncery

et al. 2023

Materials

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Section: Introductionmentioning

confidence: 99%

“…[23,24] Alloying with N has been demonstrated to not only improve the mechanical properties but also to substantially enhance the corrosion and wear resistance of Ni containing HEAs and stainless steels. [25,26] The application of severe plastic deformation (SPD) has proven to be an effective means of modification of as-cast microstructure and mechanical properties. [27][28][29][30] Among the various SPD methods, friction stir processing (FSP) stands out as a highly feasible technique capable of enforcing enormous true strains, thus achieving ultrafine microstructures.…”

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confidence: 99%

Revealing the Effects of Friction Stir Processing on the Microstructural Evolutions and Mechanical Properties of As‐Cast Interstitial FeMnCoCrN High‐Entropy Alloy

Abbasi,

Zarei‐Hanzaki,

Charkhchian

et al. 2024

Adv Eng Mater

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The present study aims to investigate the effect of friction stir processing (FSP) on the microstructural evolutions and mechanical properties of a nonequiatomic interstitial high‐entropy alloy (HEA). To achieve this, an as‐cast FeMnCoCrN interstitial HEA undergoes FSP to modify the as‐cast microstructure and investigate the resulting effects on mechanical properties. The grain size, sub‐boundaries, martensite fraction, and accommodated strain exhibit a gradient from the base metal (BM) to the stir zone (SZ). As a result of FSP, the average grain size in the upper SZ is significantly decreased from ≈700 μm in BM to 1.5 μm, which is around 500 times finer than that of the BM. Furthermore, the martensitic transformation in a single metastable face‐centered‐cubic phase specifically occurs in the thermomechanical‐affected and heat‐affected zones. Continuous and geometric dynamic recrystallizations triggered by FSP lead to the development of a refined equiaxed microstructure. This gradient microstructure, in turn, plays a pivotal role in achieving significantly improved mechanical properties when compared to the as‐cast microstructure. Remarkably, the yield strength doubles, the ultimate tensile strength increases from 548 to 852 MPa, and ductility increases by 16%.

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Distinguishing Elements at the Sub‐Nanometer Scale on the Surface of a High Entropy Alloy

Kim,

Scougale,

Sharma

et al. 2024

Advanced Materials

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Materials in crystalline form possess translational symmetry (TS) when the unit cell is repeated in real space with long and short range orders. The periodic potential in the crystal regulates the electron wave function and results in unique band structures, which further define the physical properties of the materials. On the other hand, amorphous materials lack long range order TS due to the randomization of distances and arrangements between atoms, causing the electron wave function to lack a well‐defined momentum. High entropy materials provide another way to break the TS by randomizing the potential strength at periodic atomic sites and provide unique physical and chemical properties. The configuration of the elemental distribution has a great impact on catalytic behavior and magnetic interactions in high entropy materials. Thus, it is critical to distinguish elements at the sub‐nanometer scale to uncover the detailed correlations between the configuration of the elemental distribution and the material's properties. Here, we demonstrate the use of synchrotron X‐ray scanning tunneling microscopy (SX‐STM) with sub‐nm scale resolution in identifying elements on the surface of a HEA. By examining the elemental fingerprints of X‐ray absorption spectroscopy (XAS) with a STM tip to enhance the spatial resolution, the elemental distribution on the surface of a HEA at a sub‐nm scale was extracted. The results shown here open a pathway towards a quantitative understanding of high entropy materials and their correlated material properties.This article is protected by copyright. All rights reserved

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CrMnFeCoNi high entropy alloys with carbon and nitrogen: mechanical properties, wear and corrosion resistance

Cited by 15 publications

References 28 publications

Thermodynamic and Ab Initio Design of Multicomponent Alloys Based on (Fe50Mn30Co10Cr10)-xBx (x = 0, 5, 7, 10, and 15 at.%)

Thermodynamic and Ab Initio Design of Multicomponent Alloys Based on (Fe50Mn30Co10Cr10)-xBx (x = 0, 5, 7, 10, and 15 at.%)

Revealing the Effects of Friction Stir Processing on the Microstructural Evolutions and Mechanical Properties of As‐Cast Interstitial FeMnCoCrN High‐Entropy Alloy

Distinguishing Elements at the Sub‐Nanometer Scale on the Surface of a High Entropy Alloy

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