Roles of Al on microstructures, mechanical properties and oxidation resistances of FCC AlxCoCrNiFe high entropy alloy coatings prepared by laser directed energy deposition

IF 6.1 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science and Engineering: A Pub Date : 2025-02-01 DOI:10.1016/j.msea.2024.147626
Jian Zhu , Kefeng Lu , Xidong Hui , Zhen Li , Zekun Wang , Yongling Wu , Hongyu Zheng , Yang Zhao , Sheng Zhu , Xiaoming Wang , Jinman Yu , Haiming Yu , Yi Xu
{"title":"Roles of Al on microstructures, mechanical properties and oxidation resistances of FCC AlxCoCrNiFe high entropy alloy coatings prepared by laser directed energy deposition","authors":"Jian Zhu ,&nbsp;Kefeng Lu ,&nbsp;Xidong Hui ,&nbsp;Zhen Li ,&nbsp;Zekun Wang ,&nbsp;Yongling Wu ,&nbsp;Hongyu Zheng ,&nbsp;Yang Zhao ,&nbsp;Sheng Zhu ,&nbsp;Xiaoming Wang ,&nbsp;Jinman Yu ,&nbsp;Haiming Yu ,&nbsp;Yi Xu","doi":"10.1016/j.msea.2024.147626","DOIUrl":null,"url":null,"abstract":"<div><div>In this work, FCC Al<sub><em>x</em></sub>CoCrFeNi high entropy alloys (HEAs) coatings were by laser directed energy deposition (L-DED). Single FCC microstructures were formed in all the coatings. With the addition of Al, the microstructures transformed from columnar crystals to equiaxed crystals and grain refinement was obtained, owing to the transformation starting from FCC to B2. Sub-grains with the sizes of 5∼10 μm can be found due to the cyclic thermal activation effect. Besides, a comparative number of dislocations and stacking faults were found inside the sub-grains. The addition of Al played the dual effect of enhancing strength and plasticity. Multiple mechanisms such as fine-grain strengthening, dislocation strengthening and solid solution strengthening together contributed to the strength and plasticity in this work. Al0.3 coating retained its original characteristics exposured at 850 °C for 30 h, signaling excellent oxidation resistance to high-temperature. The anti-oxidation effect of Al was much stronger than that of Cr. Al was required to reach a sufficient content to generate a dense full-covered protective film of Al<sub>2</sub>O<sub>3</sub>, which hindered the oxidation flaking of other alloying elements.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"922 ","pages":"Article 147626"},"PeriodicalIF":6.1000,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science and Engineering: A","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921509324015570","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

Abstract

In this work, FCC AlxCoCrFeNi high entropy alloys (HEAs) coatings were by laser directed energy deposition (L-DED). Single FCC microstructures were formed in all the coatings. With the addition of Al, the microstructures transformed from columnar crystals to equiaxed crystals and grain refinement was obtained, owing to the transformation starting from FCC to B2. Sub-grains with the sizes of 5∼10 μm can be found due to the cyclic thermal activation effect. Besides, a comparative number of dislocations and stacking faults were found inside the sub-grains. The addition of Al played the dual effect of enhancing strength and plasticity. Multiple mechanisms such as fine-grain strengthening, dislocation strengthening and solid solution strengthening together contributed to the strength and plasticity in this work. Al0.3 coating retained its original characteristics exposured at 850 °C for 30 h, signaling excellent oxidation resistance to high-temperature. The anti-oxidation effect of Al was much stronger than that of Cr. Al was required to reach a sufficient content to generate a dense full-covered protective film of Al2O3, which hindered the oxidation flaking of other alloying elements.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
求助全文
约1分钟内获得全文 去求助
来源期刊
Materials Science and Engineering: A
Materials Science and Engineering: A 工程技术-材料科学:综合
CiteScore
11.50
自引率
15.60%
发文量
1811
审稿时长
31 days
期刊介绍: Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.
期刊最新文献
Synergistic enhancement of strength-ductility in ODS copper alloy by exploring heterogeneous structure Enhancing strength and toughness of 7xxx aluminum alloys via TiC nanoparticles in electron beam rapid additive manufacturing Unveiling the deformation behaviors and mechanisms of Fe2.5Ni2.5CrAl multi-principal elements alloy Severe plastic deformation of bulk polycrystalline beryllium at room temperature Architecture of bimodal interconnected structure in Al-Ce-Ni ternary alloy by super-gravity solidification and Mg doping
×
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
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 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 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1