采用简单热轧策略实现分层异质层状AlCoCrFeNi2.1共晶高熵合金的强度-塑性协同增强

IF 7.9 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Qidong Ren , Tianxin Li , Hengke Xie , Yuhao Jia , Mingpan Wan , Chaowen Huang , Chaoyi Chen , Junqi Li , Yiping Lu
{"title":"采用简单热轧策略实现分层异质层状AlCoCrFeNi2.1共晶高熵合金的强度-塑性协同增强","authors":"Qidong Ren ,&nbsp;Tianxin Li ,&nbsp;Hengke Xie ,&nbsp;Yuhao Jia ,&nbsp;Mingpan Wan ,&nbsp;Chaowen Huang ,&nbsp;Chaoyi Chen ,&nbsp;Junqi Li ,&nbsp;Yiping Lu","doi":"10.1016/j.matdes.2025.114734","DOIUrl":null,"url":null,"abstract":"<div><div>Eutectic high-entropy alloys (EHEAs) have attracted considerable interest due to their superior multifunctional performance. However, the inherent tendency of stress concentration at irregular phase boundaries frequently leads to premature fracture. This study presents a facile hot-rolling strategy to achieve synergistic strength-ductility enhancement in AlCoCrFeNi<sub>2.1</sub> EHEA via constructing a hierarchical hetero-lamellar structure (HHLS). Through controlled per-pass rolling reduction (PPRD), we induce strain-partitioning-mediated microstructural refinement in the hot-rolled EHEA and activate synergistic deformation mechanisms including stacking faults, Lomer-Cottrell locks, and deformation twinning. The resultant HHLS (aligned FCC/B2 lamellae, partially recrystallized FCC regions, and intragranular B2 precipitates) triggers pronounced hetero-deformation-induced (HDI) strengthening. Consequently, the EHEA with HHLS exhibits exceptional properties: yield strength of 1202 MPa, ultimate tensile strength of 1489 MPa, and uniform elongation of 11.5 %, which are 112 %, 45 %, and 6 % higher than those of the as-cast alloy, respectively. The superior properties originate from HDI effect and FCC phase-mediated deformation mechanisms, which enable the EHEA to maintain exceptional work-hardening rate despite high dislocation density, effectively delaying plastic instability. These findings not only establish a readily implementable thermomechanical processing strategy for EHEAs, but also provide a novel paradigm for improving mechanical properties, paving the way for their application in high-performance structural materials.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114734"},"PeriodicalIF":7.9000,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Achieving synergistic strength-ductility enhancement in a hierarchical hetero-lamellar AlCoCrFeNi2.1 eutectic high-entropy alloy via facile hot-rolling strategy\",\"authors\":\"Qidong Ren ,&nbsp;Tianxin Li ,&nbsp;Hengke Xie ,&nbsp;Yuhao Jia ,&nbsp;Mingpan Wan ,&nbsp;Chaowen Huang ,&nbsp;Chaoyi Chen ,&nbsp;Junqi Li ,&nbsp;Yiping Lu\",\"doi\":\"10.1016/j.matdes.2025.114734\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Eutectic high-entropy alloys (EHEAs) have attracted considerable interest due to their superior multifunctional performance. However, the inherent tendency of stress concentration at irregular phase boundaries frequently leads to premature fracture. This study presents a facile hot-rolling strategy to achieve synergistic strength-ductility enhancement in AlCoCrFeNi<sub>2.1</sub> EHEA via constructing a hierarchical hetero-lamellar structure (HHLS). Through controlled per-pass rolling reduction (PPRD), we induce strain-partitioning-mediated microstructural refinement in the hot-rolled EHEA and activate synergistic deformation mechanisms including stacking faults, Lomer-Cottrell locks, and deformation twinning. The resultant HHLS (aligned FCC/B2 lamellae, partially recrystallized FCC regions, and intragranular B2 precipitates) triggers pronounced hetero-deformation-induced (HDI) strengthening. Consequently, the EHEA with HHLS exhibits exceptional properties: yield strength of 1202 MPa, ultimate tensile strength of 1489 MPa, and uniform elongation of 11.5 %, which are 112 %, 45 %, and 6 % higher than those of the as-cast alloy, respectively. The superior properties originate from HDI effect and FCC phase-mediated deformation mechanisms, which enable the EHEA to maintain exceptional work-hardening rate despite high dislocation density, effectively delaying plastic instability. These findings not only establish a readily implementable thermomechanical processing strategy for EHEAs, but also provide a novel paradigm for improving mechanical properties, paving the way for their application in high-performance structural materials.</div></div>\",\"PeriodicalId\":383,\"journal\":{\"name\":\"Materials & Design\",\"volume\":\"259 \",\"pages\":\"Article 114734\"},\"PeriodicalIF\":7.9000,\"publicationDate\":\"2025-09-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials & Design\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0264127525011542\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials & Design","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0264127525011542","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

共晶高熵合金(EHEAs)由于其优越的多功能性能而引起了人们的广泛关注。然而,不规则相界处固有的应力集中倾向往往导致过早断裂。本研究提出了一种简单的热轧策略,通过构建层次化异质层状结构(HHLS)来实现AlCoCrFeNi2.1 EHEA的强度-塑性协同增强。通过控制每道次轧制压下(PPRD),我们在热轧EHEA中诱导了应变分配介导的微观组织细化,并激活了包括层错、limer - cottrell锁和变形孪晶在内的协同变形机制。由此产生的HHLS(排列的FCC/B2片层、部分再结晶的FCC区和粒内B2沉淀)引发了明显的异质变形诱导(HDI)强化。结果表明,含HHLS的EHEA合金的屈服强度为1202 MPa,极限抗拉强度为1489 MPa,均匀伸长率为11.5%,分别比铸态合金高112%、45%和6%。优异的性能源于HDI效应和FCC相介导的变形机制,这使得EHEA在高位错密度的情况下仍能保持优异的加工硬化速率,有效地延缓了塑性不稳定性。这些发现不仅为EHEAs建立了一种易于实现的热机械加工策略,而且为改善其机械性能提供了一种新的范例,为其在高性能结构材料中的应用铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Achieving synergistic strength-ductility enhancement in a hierarchical hetero-lamellar AlCoCrFeNi2.1 eutectic high-entropy alloy via facile hot-rolling strategy

Achieving synergistic strength-ductility enhancement in a hierarchical hetero-lamellar AlCoCrFeNi2.1 eutectic high-entropy alloy via facile hot-rolling strategy
Eutectic high-entropy alloys (EHEAs) have attracted considerable interest due to their superior multifunctional performance. However, the inherent tendency of stress concentration at irregular phase boundaries frequently leads to premature fracture. This study presents a facile hot-rolling strategy to achieve synergistic strength-ductility enhancement in AlCoCrFeNi2.1 EHEA via constructing a hierarchical hetero-lamellar structure (HHLS). Through controlled per-pass rolling reduction (PPRD), we induce strain-partitioning-mediated microstructural refinement in the hot-rolled EHEA and activate synergistic deformation mechanisms including stacking faults, Lomer-Cottrell locks, and deformation twinning. The resultant HHLS (aligned FCC/B2 lamellae, partially recrystallized FCC regions, and intragranular B2 precipitates) triggers pronounced hetero-deformation-induced (HDI) strengthening. Consequently, the EHEA with HHLS exhibits exceptional properties: yield strength of 1202 MPa, ultimate tensile strength of 1489 MPa, and uniform elongation of 11.5 %, which are 112 %, 45 %, and 6 % higher than those of the as-cast alloy, respectively. The superior properties originate from HDI effect and FCC phase-mediated deformation mechanisms, which enable the EHEA to maintain exceptional work-hardening rate despite high dislocation density, effectively delaying plastic instability. These findings not only establish a readily implementable thermomechanical processing strategy for EHEAs, but also provide a novel paradigm for improving mechanical properties, paving the way for their application in high-performance structural materials.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Materials & Design
Materials & Design Engineering-Mechanical Engineering
CiteScore
14.30
自引率
7.10%
发文量
1028
审稿时长
85 days
期刊介绍: Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry. The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信