Deformation behavior and strengthening effects of an eutectic AlCoCrFeNi2.1 high entropy alloy probed by in-situ synchrotron X-ray diffraction and post-mortem EBSD

Shen, Jiajia; Lopes, José Gabriel Pereira; Zeng, Zhi; Choi, Yeon Taek; Maawad, Emad; Schell, Norbert; Kim, Hyoung Seop; Mishra, Rajiv S.; Oliveira, J.P.

doi:10.1016/j.msea.2023.144946

Cited by 51 publications

(3 citation statements)

References 89 publications

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“…A material’s characteristic sizes on the micro and nano scales, such as grain size and dimensions, can significantly affect its mechanical behavior [ 84 , 85 ]. Nanoindentation, tensile and torsion tests of fibers with diameters of microns, as well as bending and tensile tests of ribbons indicate that the yield strength of a material increases with a decreasing diameter or thickness of the samples.…”

Section: The Effects Of Texture Sizes and D -Orbit...mentioning

confidence: 99%

Toughening of Ni-Mn-Based Polycrystalline Ferromagnetic Shape Memory Alloys

Ma,

Zhang,

Zheng

et al. 2023

Materials

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Solid-state refrigeration technology is expected to replace conventional gas compression refrigeration technology because it is environmentally friendly and highly efficient. Among various solid-state magnetocaloric materials, Ni-Mn-based ferromagnetic shape memory alloys (SMAs) have attracted widespread attention due to their multifunctional properties, such as their magnetocaloric effect, elastocaloric effect, barocaloric effect, magnetoresistance, magnetic field-induced strain, etc. Recently, a series of in-depth studies on the thermal effects of Ni-Mn-based magnetic SMAs have been carried out, and numerous research results have been obtained. It has been found that poor toughness and cyclic stability greatly limit the practical application of magnetic SMAs in solid-state refrigeration. In this review, the influences of element doping, microstructure design, and the size effect on the strength and toughness of Ni-Mn-based ferromagnetic SMAs and their underlying mechanisms are systematically summarized. The pros and cons of different methods in enhancing the toughness of Ni-Mn-based SMAs are compared, and the unresolved issues are analyzed. The main research directions of Ni-Mn-based ferromagnetic SMAs are proposed and discussed, which are of scientific and technological significance and could promote the application of Ni-Mn-based ferromagnetic SMAs in various fields.

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Section: The Effects Of Texture Sizes and D -Orbit...mentioning

confidence: 99%

Toughening of Ni-Mn-Based Polycrystalline Ferromagnetic Shape Memory Alloys

Ma,

Zhang,

Zheng

et al. 2023

Materials

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“…[22][23][24][25][26][27] The Rietveld analysis, facilitated by the Materials Analysis Using Diffraction (MAUD) software, can be employed to improve the fit of the diffraction peaks profiles that are influenced by different factors. [28,29] The use of high-intensity synchrotron X-Ray sources and detectors with high angular resolution usually produces better quality results than a conventional X-Ray technique. [22,27,29] This work aims to investigate how cold rolling and subsequent thermal treatment affect the microstructure and consequently the hardness of Fe-24Mn-3Al-1Ni-2Si-0.06C steels using high-resolution XRD.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Parameters of Cold‐Rolled and Annealed Fe–24Mn–3Al–1Ni–2Si–0.06C Steel Obtained by X‐Ray Diffraction

de Lima,

Siqueira,

Freitas Neto

et al. 2023

steel research int.

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Twinning‐induced plasticity (Twip) steel is characterized by the presence of twins and austenite at room temperature. In the present work, Fe‐24Mn‐3Al‐1Ni‐2Si‐0.06C steel is cold‐rolled at 30, 50, and 80%, thickness reduction and subsequently annealed at temperatures between 300 and 1100°C for 15 min. The microstructure, and hardness are analyzed and dislocation density, stacking fault, and twin probability are calculated using the diffraction method based on the intensity of X‐rays generated in a synchrotron facility. The Rietveld analysis using Materials Analysis Using Diffraction (MAUD) software was performed, and Popa Model was employed. Cold rolling increases hardness due to the formation of deformation twins, stacking fault, and dislocation in different degrees depending on the thickness reduction. During annealing, recrystallization influences the parameters obtained by X‐ray diffraction such as stacking fault probability and dislocation density.This article is protected by copyright. All rights reserved.

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“…Amorphous alloys, also known as metallic glasses, have a unique arrangement of short-range ordered and long-range disordered atoms and the absence of defects, such as grain boundaries and dislocations [1,2]. Compared with conventional crystalline materials, amorphous alloys have excellent physical properties, chemical properties and biocompatibility, such as high strength, high hardness, high ductility, and good corrosion resistance [3,4].…”

Section: Introductionmentioning

confidence: 99%

Crystallization of Zr-Based Amorphous Alloys in Laser Welding

Yan

Song

Huang

et al. 2023

Metals

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Crystallization often occurs in the laser welding of amorphous alloys, reducing the properties of amorphous alloys. Therefore, the research in this thesis focuses on the experimental selection of suitable welding parameters to prevent crystallization of Zr-based amorphous alloys during the laser welding process. As such, it is necessary to simulate the temperature field curve of the welding area by computer and then determine the power and laser moving speed of laser welding. In this paper, the temperature field curve of the Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit1) amorphous alloy in laser welding is obtained by finite element analysis. The continuous heating curve (CHT) of Vit1 is fitted by the Vogel–Fulcher–Tammann (VFT) equation and the Kissinger equation. If the temperature field curve intersects with the CHT curve, crystallization occurs. The experiment results show that the VFT equation can be used to predict the crystallization of Vit1 better in laser welding. The temperature and welding time are increased by using a low welding speed. Therefore, the temperature of the weld zone cannot fall in time, resulting in the intersection of the temperature field curve and the CHT curve. Thus, crystallization can be avoided if the welding speed is controlled within a reasonable range, and the highest temperature is kept under the CHT curve. The combination of the CHT curve and the temperature field curve shows that the samples at 300 W-3 mm/s and 300 W-6 mm/s welding parameters all undergo crystallization, while the samples at 300 W-9 mm/s and 300 W-12 mm/s welding parameters do not undergo crystallization. Through the flexural test, it is found that the flexural strength of the welded interface is at its the maximum under 300 W-9 mm/s.

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Deformation behavior and strengthening effects of an eutectic AlCoCrFeNi2.1 high entropy alloy probed by in-situ synchrotron X-ray diffraction and post-mortem EBSD

Cited by 51 publications

References 89 publications

Toughening of Ni-Mn-Based Polycrystalline Ferromagnetic Shape Memory Alloys

Toughening of Ni-Mn-Based Polycrystalline Ferromagnetic Shape Memory Alloys

Microstructural Parameters of Cold‐Rolled and Annealed Fe–24Mn–3Al–1Ni–2Si–0.06C Steel Obtained by X‐Ray Diffraction

Crystallization of Zr-Based Amorphous Alloys in Laser Welding

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