Outstanding shear resistance in a low-density refractory Ti3NbVAl high-entropy alloy subjected to dynamic loading

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2025-02-25 DOI:10.1016/j.scriptamat.2025.116610

Na Yan , Shiteng Zhao , Zezhou Li , Rui Feng , Peter․ K․ Liaw , Marc André Meyers

{"title":"Outstanding shear resistance in a low-density refractory Ti3NbVAl high-entropy alloy subjected to dynamic loading","authors":"Na Yan , Shiteng Zhao , Zezhou Li , Rui Feng , Peter․ K․ Liaw , Marc André Meyers","doi":"10.1016/j.scriptamat.2025.116610","DOIUrl":null,"url":null,"abstract":"<div><div>The mechanical property of a low-density refractory Ti3NbVAl high-entropy alloy (HEA) with an ordered B2 structure is investigated in the dynamic regime. The yield strength increased from 751 MPa at a strain rate of 10–3 s-1 to 1,400 MPa at a strain rate of ∼ 103 s-1, indicating an extraordinary strain-rate-hardening capability. Dynamic compression of the hat-shaped sample suggests that it also exhibits excellent shear resistance under a deviatoric strain rate of 105 s-1, which resists the adiabatic shear-band formation at a large imposed shear strain of ∼16. The microstructure inside the shear bands shows that a severe grain refinement combined with a B2 to body-centered-cubic (BCC) crystal structure transition occurred during shear localization. Our results demonstrate that the Ti3NbVAl HEA exhibits great toughness under dynamic-loading conditions. An excellent load-bearing capacity under high-strain rate loading conditions leads to its promising applications in aerospace, transportation, and energy.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"261 ","pages":"Article 116610"},"PeriodicalIF":5.3000,"publicationDate":"2025-02-25","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/S1359646225000739","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

The mechanical property of a low-density refractory Ti₃NbVAl high-entropy alloy (HEA) with an ordered B₂ structure is investigated in the dynamic regime. The yield strength increased from 751 MPa at a strain rate of 10^–3 s^-1 to 1,400 MPa at a strain rate of ∼ 10³ s^-1, indicating an extraordinary strain-rate-hardening capability. Dynamic compression of the hat-shaped sample suggests that it also exhibits excellent shear resistance under a deviatoric strain rate of 10⁵ s^-1, which resists the adiabatic shear-band formation at a large imposed shear strain of ∼16. The microstructure inside the shear bands shows that a severe grain refinement combined with a B₂ to body-centered-cubic (BCC) crystal structure transition occurred during shear localization. Our results demonstrate that the Ti₃NbVAl HEA exhibits great toughness under dynamic-loading conditions. An excellent load-bearing capacity under high-strain rate loading conditions leads to its promising applications in aerospace, transportation, and energy.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

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.