{"title":"Formation of single-phased B2 multi-principal element intermetallics: From experiments to modeling","authors":"","doi":"10.1016/j.scriptamat.2024.116437","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, a variety of Co-Ni-Ti-Zr alloys with various compositions were examined to identify potential single-phase B2 intermetallics. While classical theoretical models suggested that most compositions would present multiple phases or even amorphous phases, the equiatomic CoNiTiZr alloy revealed a stable single-phased B2 structure even under extended annealing at temperatures approaching its melting point. Notably, this alloy showcased desirable properties, such as a strong Elinvar effect and a high elastic strain limit. To aid in the design of B2 multi-principal elemental intermetallics (MPEIs), we proposed a pseudo-binary system model that counts for both chemical long-range order across two sublattices and random atom mixing within each sublattice. The outcome of this study is expected to accelerate the identification of valuable B2 MPEIs.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scripta Materialia","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S135964622400472X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, a variety of Co-Ni-Ti-Zr alloys with various compositions were examined to identify potential single-phase B2 intermetallics. While classical theoretical models suggested that most compositions would present multiple phases or even amorphous phases, the equiatomic CoNiTiZr alloy revealed a stable single-phased B2 structure even under extended annealing at temperatures approaching its melting point. Notably, this alloy showcased desirable properties, such as a strong Elinvar effect and a high elastic strain limit. To aid in the design of B2 multi-principal elemental intermetallics (MPEIs), we proposed a pseudo-binary system model that counts for both chemical long-range order across two sublattices and random atom mixing within each sublattice. The outcome of this study is expected to accelerate the identification of valuable B2 MPEIs.
期刊介绍:
Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.