{"title":"Understanding the tensile ductility of a novel low-activation BCC high-entropy alloy deformed at intermediate temperature","authors":"H. Jiang , B.B. He , M.X. Huang","doi":"10.1016/j.scriptamat.2024.116269","DOIUrl":null,"url":null,"abstract":"<div><p>Low-activation body-centered cubic (BCC) high-entropy alloys (HEAs) often possess poor tensile ductility. Here we report a novel low-activation VCrFeMn<sub>0.33</sub> BCC HEA that exhibits good tensile ductility at 650 °C and above. However, it shows poor tensile ductility at 500 °C and below, indicating that the ductile-to-brittle transition temperature (DBTT) of the current HEA falls between 500 °C and 650 °C. At temperatures above DBTT, the current BCC HEA deforms via dislocation glide, similar to the tensile deformation observed in conventional ductile BCC alloys, which is rarely reported for non-refractory BCC HEAs.</p></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-07-10","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/S135964622400304X","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
Low-activation body-centered cubic (BCC) high-entropy alloys (HEAs) often possess poor tensile ductility. Here we report a novel low-activation VCrFeMn0.33 BCC HEA that exhibits good tensile ductility at 650 °C and above. However, it shows poor tensile ductility at 500 °C and below, indicating that the ductile-to-brittle transition temperature (DBTT) of the current HEA falls between 500 °C and 650 °C. At temperatures above DBTT, the current BCC HEA deforms via dislocation glide, similar to the tensile deformation observed in conventional ductile BCC alloys, which is rarely reported for non-refractory BCC HEAs.
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.