High creep performance of a nano-SiC particulate reinforced 7775 aluminium matrix composite at elevated temperatures

IF 4.7 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Yong-Chong Kang , Barton Arkhurst , Sammy Lap Ip Chan
{"title":"High creep performance of a nano-SiC particulate reinforced 7775 aluminium matrix composite at elevated temperatures","authors":"Yong-Chong Kang ,&nbsp;Barton Arkhurst ,&nbsp;Sammy Lap Ip Chan","doi":"10.1016/j.matchemphys.2025.131270","DOIUrl":null,"url":null,"abstract":"<div><div>The applicability of a nanometric silicon carbide (SiC)-reinforced 7775 aluminium matrix composite (AMC) at elevated temperatures and the underlying creep mechanisms were investigated. AMCs with 1 vol% nanometric and micrometric SiC particles, along with an unreinforced 7775 Al alloy, were studied. Under applied stresses of 42, 32, and 22 MPa at 673, 723, and 773 K, respectively, the nanometric SiC-reinforced AMC exhibited creep resistance nearly two orders of magnitude higher than the unreinforced and micrometric-reinforced AMCs. Microstructural analyses revealed finely dispersed precipitates that grew with increasing creep temperature and fully dissolved at 773 K, leading to rapid creep in the unreinforced and micrometric AMCs. In contrast, the nanometric SiC particles substituted for the precipitates and served as the primary obstacles to creep deformation. The enhanced creep resistance is attributed to a higher threshold stress and strong dislocation–precipitate interactions. This is the first report demonstrating effective creep resistance of a 7775 AMC with a very small volume fraction of nano-reinforcement at a high temperature of 773 K (0.85 of the liquidus temperature).</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"345 ","pages":"Article 131270"},"PeriodicalIF":4.7000,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Chemistry and Physics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0254058425009162","RegionNum":3,"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 applicability of a nanometric silicon carbide (SiC)-reinforced 7775 aluminium matrix composite (AMC) at elevated temperatures and the underlying creep mechanisms were investigated. AMCs with 1 vol% nanometric and micrometric SiC particles, along with an unreinforced 7775 Al alloy, were studied. Under applied stresses of 42, 32, and 22 MPa at 673, 723, and 773 K, respectively, the nanometric SiC-reinforced AMC exhibited creep resistance nearly two orders of magnitude higher than the unreinforced and micrometric-reinforced AMCs. Microstructural analyses revealed finely dispersed precipitates that grew with increasing creep temperature and fully dissolved at 773 K, leading to rapid creep in the unreinforced and micrometric AMCs. In contrast, the nanometric SiC particles substituted for the precipitates and served as the primary obstacles to creep deformation. The enhanced creep resistance is attributed to a higher threshold stress and strong dislocation–precipitate interactions. This is the first report demonstrating effective creep resistance of a 7775 AMC with a very small volume fraction of nano-reinforcement at a high temperature of 773 K (0.85 of the liquidus temperature).

Abstract Image

纳米碳化硅颗粒增强7775铝基复合材料高温高蠕变性能研究
研究了纳米碳化硅(SiC)增强7775铝基复合材料(AMC)的高温适用性及其蠕变机理。研究了含有1 vol%纳米级和微米级SiC颗粒的复合材料,以及未增强的7775铝合金。在673、723和773 K分别为42,32和22 MPa的外加应力下,纳米sic增强的AMC的抗蠕变性能比未增强和微增强的AMC高出近两个数量级。显微组织分析表明,随着蠕变温度的升高,细小的析出物逐渐分散,在773 K时完全溶解,导致未增强和微米级碳纤维快速蠕变。相反,纳米SiC颗粒取代了析出相,成为蠕变变形的主要障碍。蠕变抗力的增强是由于较高的阈值应力和较强的位错-析出相互作用。这是第一个证明在773 K(液相温度的0.85)高温下,具有非常小体积分数纳米增强的7775 AMC具有有效的抗蠕变性能的报告。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Materials Chemistry and Physics
Materials Chemistry and Physics 工程技术-材料科学:综合
CiteScore
8.70
自引率
4.30%
发文量
1515
审稿时长
69 days
期刊介绍: Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.
×
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