scholarly journals High-entropy alloys and the periodic table of elements

2021 ◽  
Vol 64 (3) ◽  
pp. 214-216
Author(s):  
E. G. Vinokurov ◽  
V. V. Farafonov ◽  
V. P. Meshalkin
Keyword(s):  
Research And Development ◽  
Periodic Table ◽  
Web Of Science ◽  
Chemical Elements ◽  
Chemical Information ◽  
High Entropy Alloys ◽  
New Materials ◽  
High Entropy ◽  
Frequency Of Use

To select the compositions of high-entropy alloys (HEA) consisting of five or more elements, it is necessary to use methods that take into account many variables and the complexity of assessing the relationships between them. Based on chemical information approaches to the analysis of Web of Science databases, data on the frequency of use of chemical elements in the described HEAs were obtained, which allow us to determine trends in the research and development of new materials.

scholarly journals A general and transferable deep learning framework for predicting phase formation in materials

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Shuo Feng ◽  
Huadong Fu ◽  
Huiyu Zhou ◽  
Yuan Wu ◽  
Zhaoping Lu ◽  
...  
Keyword(s):  
Deep Learning ◽  
Phase Formation ◽  
Periodic Table ◽  
Glass Forming Ability ◽  
High Entropy Alloys ◽  
New Materials ◽  
High Entropy ◽  
Learning Framework ◽  
Glass Forming ◽  
Small Dataset

AbstractMachine learning has been widely exploited in developing new materials. However, challenges still exist: small dataset is common for most tasks; new datasets, special descriptors and specific models need to be built from scratch when facing a new task; knowledge cannot be readily transferred between independent models. In this paper we propose a general and transferable deep learning (GTDL) framework for predicting phase formation in materials. The proposed GTDL framework maps raw data to pseudo-images with some special 2-D structure, e.g., periodic table, automatically extracts features and gains knowledge through convolutional neural network, and then transfers knowledge by sharing features extractors between models. Application of the GTDL framework in case studies on glass-forming ability and high-entropy alloys show that the GTDL framework for glass-forming ability outperformed previous models and can correctly predicted the newly reported amorphous alloy systems; for high-entropy alloys the GTDL framework can discriminate five types phases (BCC, FCC, HCP, amorphous, mixture) with accuracy and recall above 94% in fivefold cross-validation. In addition, periodic table knowledge embedded in data representations and knowledge shared between models is beneficial for tasks with small dataset. This method can be easily applied to new materials development with small dataset by reusing well-trained models for related materials.

scholarly journals Nanoindentation Test Conducted on Single Scan Tracks for the Development of New Multi-Principal Element Alloys

2021 ◽  
Author(s):  
Giulio Cattano ◽  
Massimo Lorusso ◽  
Flaviana Calignano ◽  
Marco Actis Grande ◽  
Diego Manfredi ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Phase Evolution ◽  
Nanoindentation Test ◽  
High Temperature Strength ◽  
High Entropy Alloys ◽  
New Materials ◽  
Effective Technique ◽  
Principal Element ◽  
High Entropy ◽  
Nanoindentation Testing

Urgent environmental challenges and emerging additive manufacturing (AM) technologies push research towards more performant and new materials. In the field of metallurgy, high entropy alloys (HEAs) have recently represented a topic of intense research because of their promising properties, such as high temperature strength and stability. Moreover, this class of multi-principal element alloys (MPEAs) have opened up researcher community to unexplored compositional spaces, making prosper literature of high-throughput methodologies and tools for rapidly screening large number of alloys. However, none of the methods has been aimed to design new MPEAs for AM process known as selective laser melting (SLM) so far. Here we conducted nanoindentation testing on single scan tracks of elemental powder blends and pre-alloyed powders after ball milling of AlTiCuNb and AlTiVNb. Results show that nanoindentation can represent an effective technique to gain information about phase evolution during laser scanning, contributing to accelerate the development of new MPEAs.

Soft chemistry of pure silver as unique plasmonic metal of the Periodic Table of Elements

2020 ◽  
Vol 92 (7) ◽  
pp. 1007-1028
Author(s):  
Anna A. Semenova ◽  
Irina A. Veselova ◽  
Nadezhda A. Brazhe ◽  
Andrei V. Shevelkov ◽  
Eugene A. Goodilin
Keyword(s):  
Raman Spectroscopy ◽  
Periodic Table ◽  
Chemical Elements ◽  
Surface Enhanced Raman Spectroscopy ◽  
New Materials ◽  
Soft Chemistry ◽  
Pure Silver ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Practical Tool

AbstractThe International Year of The Periodic Table of Chemical Elements revealed that the Table remains both a deeply fundamental paradigm for various branches of chemistry and a universal practical tool for predictable design of new materials. Silver is a notable “nanoelement” particularly known by its plasmonic properties. A key advantage of this metal is an easily achievable morphological variety of nanostructured materials. This element represents a research branch of precise engineering of shapes and sizes of nanoparticle ensembles and smart hierarchic nanostructures. In the review, unique features of silver are discussed with respect to the development of novel analytical methods for forthcoming applications of surface-enhanced Raman spectroscopy (SERS) in ecology, biology and medicine.

scholarly journals High Entropy Alloys Behaviour During Welding

2001 ◽  
Vol 71 (3) ◽  
pp. 219-233
Author(s):  
Elena Scutelnicu ◽  
George Simion ◽  
Carmen Catalina Rusu ◽  
Marius Corneliu Gheonea ◽  
Ionelia Voiculescu ◽  
...  
Keyword(s):  
Electron Beam Welding ◽  
Chemical Elements ◽  
Laser Beam Welding ◽  
Welding Process ◽  
Advanced Materials ◽  
Technical Solution ◽  
High Entropy Alloys ◽  
Shielded Metal Arc Welding ◽  
High Entropy ◽  
Friction Stir

The High Entropy Alloys have been developed in the last two decades by mixing at least four chemical elements in equiatomic or quasi-equiatomic proportions. Due to the large range of structures and outstanding properties, these advanced materials can be used for structural, high-temperature, wear-resistant, corrosion-resistant, oxidation-resistant, and electrical elements. In order to extend the applicability area of High Entropy Alloys and to improve the knowledge in terms of their behaviour, the researchers worldwide have investigated the phenomena generated by the welding process and its effects produced on their properties. The findings have revealed that these special alloys can be recommended to be used both in high and low-temperature applications. This paper presents a review focused on the weldability and behaviour of CoCrFeMnNi, AlCoCrCuFeNi, AlCrFeCoNi, and CoCrFeNi alloys during Friction Stir Welding, Electron Beam Welding, Laser Beam Welding, and Tungsten Inert Gas. Original results related to the weldability and behaviour of new AlCrFeMnNi alloys developed and subjected to Shielded Metal Arc Welding, as a technical solution for performing morpho-functional structures used in the military field, are presented and discussed, too. The experimental results demonstrated that an appropriate selection of joining technique and filler metal, as well as an optimal combination of process parameters led to performing quality joints, free of defects.

scholarly journals Prospects for the Implementation of New Materials and Technologies in the Aerospace Industry

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Taras Yanko ◽  
Olexii Dmytrenko
Keyword(s):  
Titanium Alloys ◽  
Carbon Materials ◽  
Nickel Foam ◽  
Aerospace Industry ◽  
Aviation Industry ◽  
High Entropy Alloys ◽  
New Materials ◽  
High Entropy ◽  
Materials Used ◽  
Aircraft Production

Abstract This article considers the main materials used to make aircraft, both fuselage and engines. First, the problems that force developers to introduce new materials in aircraft production are identified. We then present features of the introduction of heat-resistant titanium alloys, ways of improving the mechanical properties of parts made of titanium alloys, and methods of manufacturing complex details. Other promising materials for the aviation industry, such as high-entropy alloys, quasicrystals, carbon-carbon materials, and nickel foam, are also considered.

Research and development of welding methods and welding mechanism of high-entropy alloys: A review

2021 ◽  
pp. 102503
Author(s):  
Yali Zhang ◽  
Xiaosong Jiang ◽  
Yan Fang ◽  
Yongjian Fang ◽  
Bing Liu ◽  
...  
Keyword(s):  
Research And Development ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals High-Entropy Alloys Including 3d, 4d and 5d Transition Metals from the Same Group in the Periodic Table

2016 ◽  
Vol 57 (7) ◽  
pp. 1197-1201 ◽  
Author(s):  
Akira Takeuchi ◽  
Kenji Amiya ◽  
Takeshi Wada ◽  
Kunio Yubuta
Keyword(s):  
Transition Metals ◽  
Periodic Table ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals Study of Structure and Distribution of Chemical Elements in Cast High-Entropy Alloys of Al$_{x}$FeNiCoCuCr System

2016 ◽  
Vol 36 (10) ◽  
pp. 1327-1342 ◽  
Author(s):  
V. M. Nadutov ◽  
◽  
S. Yu. Makarenko ◽  
P. Yu. Volosevych ◽  
V. P. Zalutskii ◽  
...  
Keyword(s):  
Chemical Elements ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals Laves Phase Formation in High Entropy Alloys

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1962
Author(s):  
Roman Ryltsev ◽  
Vasiliy Gaviko ◽  
Svetlana Estemirova ◽  
Evgenii Sterkhov ◽  
Lubov Cherepanova ◽  
...  
Keyword(s):  
Single Phase ◽  
Chemical Elements ◽  
Laves Phase ◽  
Structural Defects ◽  
Clear Understanding ◽  
High Entropy Alloys ◽  
High Concentration ◽  
Laves Phases ◽  
High Entropy ◽  
Chemical Complexity

One of the intriguing recent results in the field of high-entropy alloys is the discovery of single-phase equiatomic multi-component Laves intermetallics. However, there is no clear understanding that a combination of chemical elements will form such high-entropy compounds. Here we contribute to understanding this issue by modifying the composition of duodenary TiZrHfNbVCrMoMnFeCoNiAl (12x) alloy in which we recently reported the fabrication of hexagonal C14 Laves phase. We consider three alloys based on 12x: 7x = 12x-VCrMoMnFe, 12x + Sc, 12x + Be and observe that all of them crystalize with the formation of C14 Laves phase as a dominant structure. We report that 12x + Be alloy reveals a single-phase C14 structure with a very high concentration of structural defects and ultra-fine dendritic microstructure with an almost homogenous distribution of the constituted elements over the alloy matrix. The analysis of electrical and magnetic properties reveals that the Laves phases are Curie-Weiss paramagnets, which demonstrate metallic conduction; 7x and 12x alloys also reveal a pronounced Kondo-like anomaly. Analysis of experimental data as well as ab initio calculations suggest that chemical complexity and compositional disorder cause strong s-d band scattering and thus the rather high density of d-states in the conduction band.

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