High Entropy Alloys & Materials最新文献

Synthesis of Multi-component Alloys (Co_20Cr_20Fe_20Mn_20Ti_20 and Co_20Cr_20Fe_20Mn_20Ti_20Ni_20) by Mechanical Alloying Route 通过机械合金化路线合成多组分合金（Co_20Cr_20Fe_20Mn_20Ti_20 和 Co_20Cr_20Fe_20Mn_20Ti_20Ni_20

High Entropy Alloys & Materials Pub Date : 2024-01-13 DOI: 10.1007/s44210-023-00025-9

Turin Datta, Indranil Manna, J. Majumdar

引用次数: 0

An Experimental High-Throughput to High-Fidelity Study Towards Discovering Al–Cr Containing Corrosion-Resistant Compositionally Complex Alloys 高通量到高保真度的Al-Cr复合耐蚀合金实验研究

High Entropy Alloys & Materials Pub Date : 2023-11-08 DOI: 10.1007/s44210-023-00020-0

Debashish Sur, Emily F. Holcombe, William H. Blades, Elaf A. Anber, Daniel L. Foley, Brian L. DeCost, Jing Liu, Jason Hattrick-Simpers, Karl Sieradzki, Howie Joress, John R. Scully, Mitra L. Taheri

{"title":"An Experimental High-Throughput to High-Fidelity Study Towards Discovering Al–Cr Containing Corrosion-Resistant Compositionally Complex Alloys","authors":"Debashish Sur, Emily F. Holcombe, William H. Blades, Elaf A. Anber, Daniel L. Foley, Brian L. DeCost, Jing Liu, Jason Hattrick-Simpers, Karl Sieradzki, Howie Joress, John R. Scully, Mitra L. Taheri","doi":"10.1007/s44210-023-00020-0","DOIUrl":"https://doi.org/10.1007/s44210-023-00020-0","url":null,"abstract":"Abstract Compositionally complex alloys hold the promise of simultaneously attaining superior combinations of properties, such as corrosion resistance, light-weighting, and strength. Achieving this goal is a challenge due in part to a large number of possible compositions and structures in the vast alloy design space. High-throughput methods offer a path forward, but a strong connection between the synthesis of an alloy of a given composition and structure with its properties has not been fully realized to date. Here, we present the rapid identification of corrosion-resistant alloys based on combinations of Al and Cr in a base Al–Co–Cr–Fe–Ni alloy. Previously unstudied alloy stoichiometries were identified using a combination of high-throughput experimental screening coupled with key metallurgical and electrochemical corrosion tests, identifying alloys with excellent passivation behavior. The alloy native oxide performance and its self-healing attributes were probed using rapid tests in deaerated 0.1-mol/L H 2 SO 4 . Importantly, a correlation was found between the electrochemical impedance modulus of the exposure-modified air-formed film and self-healing rate of the CCAs. Multi-element extended x-ray absorption fine structure analyses connected more ordered type chemical short-range order in the Ni–Al 1st nearest-neighbor shell to poorer corrosion resistance. This report underscores the utility of high-throughput exploration of compositionally complex alloys for the identification and rapid screening of a vast stoichiometric space. Graphical Abstract","PeriodicalId":496743,"journal":{"name":"High Entropy Alloys & Materials","volume":"29 25","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135391351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

High-Entropy Alloys: A Critical Review of Aqueous Corrosion Behavior and Mechanisms 高熵合金:水腐蚀行为和机理的评述

High Entropy Alloys & Materials Pub Date : 2023-10-28 DOI: 10.1007/s44210-023-00021-z

J. Y. Zhang, B. Xiao, T. H. Chou, B. X. Cao, Y. L. Zhao, B. Liu, K. Huang, S. B. Yang, J. C. Su, Y. Liu, T. Yang

{"title":"High-Entropy Alloys: A Critical Review of Aqueous Corrosion Behavior and Mechanisms","authors":"J. Y. Zhang, B. Xiao, T. H. Chou, B. X. Cao, Y. L. Zhao, B. Liu, K. Huang, S. B. Yang, J. C. Su, Y. Liu, T. Yang","doi":"10.1007/s44210-023-00021-z","DOIUrl":"https://doi.org/10.1007/s44210-023-00021-z","url":null,"abstract":"Advances in corrosion-resistant alloys have primarily been driven by new corrosion mechanisms and new alloys. As a new class of structural and functional materials, high-entropy alloys (HEAs) represent a novel compositional design concept, which not only enhances the in-depth understanding of the corrosion mechanisms of traditional corrosion-resistant alloys, but also broadens the spectrum of high-performance corrosion-resistant alloys with better damage tolerance. HEAs break through the characteristics of a single component of traditional corrosion-resistant alloys, and their copious degrees of freedom in the selection of alloying elements provide a broad compositional design space for alloys with various chemical structures. Among them, the fascinating solid-solution microstructures of single-phase HEAs and the outstanding mechanical properties exhibited by dual-phase HEAs have facilitated the study of the corrosion of HEAs. In this review, the corrosion behavior and mechanisms of the currently reported HEAs have been summarized in consideration of microstructures and phase structures by comparing with traditional corrosion-resistant alloys, such as Fe-based stainless steels (SS) and Ni-based superalloys. In terms of aqueous corrosion behavior, HEAs can exhibit corrosion properties comparable or even superior to traditional corrosion-resistant alloys via controlling composition and phase structure. This comprehensive review of the composition–structure–corrosion relationship of HEAs will allow for continuous advancement in corrosion-resistant alloys.","PeriodicalId":496743,"journal":{"name":"High Entropy Alloys & Materials","volume":"2019 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136159363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructural and Micromechanical Analysis of Cold Sprayed CrMnCoFeNi High Entropy Cantor Alloy Coatings 冷喷涂CrMnCoFeNi高熵康托合金涂层的显微组织和力学分析

High Entropy Alloys & Materials Pub Date : 2023-10-27 DOI: 10.1007/s44210-023-00022-y

Maya M. Harfouche, Sima A. Alidokht, Nicolas Brodusch, Raynald Gauvin, Richard R. Chromik

{"title":"Microstructural and Micromechanical Analysis of Cold Sprayed CrMnCoFeNi High Entropy Cantor Alloy Coatings","authors":"Maya M. Harfouche, Sima A. Alidokht, Nicolas Brodusch, Raynald Gauvin, Richard R. Chromik","doi":"10.1007/s44210-023-00022-y","DOIUrl":"https://doi.org/10.1007/s44210-023-00022-y","url":null,"abstract":"CrMnCoFeNi High Entropy Alloy (or Cantor alloy) powder was cold sprayed using nitrogen process gas. A thick and dense coating was successfully obtained on a mild steel substrate with a process gas temperature and pressure of 950 °C and 4.9 MPa, respectively. Due to its unique properties and complex composition, rising interest in the CrMnCoFeNi Cantor High Entropy Alloy and its use in thermal spray coatings has been noted since its creation in 2004. In this work, an in-depth analysis of the cold sprayed CrMnCoFeNi coating was done to provide insight on the mechanical properties and features present in the different microstructural regions of the coating. X-ray diffraction analysis of the coating showed that the single-phase FCC structure of the CrMnCoFeNi feedstock powder was retained after cold spraying. Significant deformation of the powder particles was observed. Nanocrystalline regions were observed at the splat interfaces which exhibited a high nano-hardness (~ 5.4 GPa) due to deformation-induced grain refining. The splat centers did not undergo grain refining, but still exhibited a higher nano-hardness (~ 4.5 GPa) than the feedstock powder (~ 3.3 GPa) due to the presence of deformation-induced dislocations revealed with scanning transmission electron microscopy. Furthermore, electron channeling contrast imaging and scanning transmission electron microscopy revealed the presence of linear deformation-induced dislocations in the coating microstructure, indicating that mechanical twinning could be a deformation mechanism occurring during cold spray of Cantor alloy powder.","PeriodicalId":496743,"journal":{"name":"High Entropy Alloys & Materials","volume":"12 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136234014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High Entropy Alloys and Materials 高熵合金和材料

High Entropy Alloys & Materials Pub Date : 2023-10-27 DOI: 10.1007/s44210-023-00019-7

Ian Baker, Brian Cantor, Jien-Wei Yeh

引用次数: 1