A Study on the Microstructure and Properties of Cu-Fe-Mg-Ti Alloys Based on Composition Regulation.

IF 3.1 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Materials Pub Date : 2025-03-17 DOI:10.3390/ma18061325

Yu Ding, Xiangpeng Xiao, Dawei Yuan, Jinshui Chen

{"title":"A Study on the Microstructure and Properties of Cu-Fe-Mg-Ti Alloys Based on Composition Regulation.","authors":"Yu Ding, Xiangpeng Xiao, Dawei Yuan, Jinshui Chen","doi":"10.3390/ma18061325","DOIUrl":null,"url":null,"abstract":"This study systematically investigates how Fe-Ti atomic ratios (1:1, 1:2, and 2:1) influence the microstructure, mechanical properties, and softening resistance of Cu-Fe-Mg-Ti alloys under fixed total Fe + Ti content. Through hardness testing, electrical conductivity measurements, and multiscale characterization (optical microscopy, scanning/transmission electron microscopy, and X-ray diffraction), we reveal a previously unreported phenomenon: Ti-dominated ratios (1:2) enable superior strength-conductivity synergy. After 70% cold rolling and 550 °C aging, the alloy with a 2:1 Fe/Ti ratio exhibits peak hardness (166.5 HV) and conductivity (64.1% IACS), outperforming both 1:1 (173.9 HV, 51.3% IACS) and 1:2 (189.5 HV, 44.2% IACS) counterparts. Critical microstructure analysis confirms that increased Ti content promotes high-density Fe2Ti nanoprecipitation (5-15 nm) with coherent interfaces, enhancing strength while mitigating electron scattering. This work establishes atomic ratio optimization as a novel strategy to break the traditional strength-conductivity trade-off in copper alloys, providing a 21% hardness improvement over conventional Fe-Ti systems without sacrificing essential electrical performance.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 6","pages":""},"PeriodicalIF":3.1000,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11944126/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.3390/ma18061325","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

This study systematically investigates how Fe-Ti atomic ratios (1:1, 1:2, and 2:1) influence the microstructure, mechanical properties, and softening resistance of Cu-Fe-Mg-Ti alloys under fixed total Fe + Ti content. Through hardness testing, electrical conductivity measurements, and multiscale characterization (optical microscopy, scanning/transmission electron microscopy, and X-ray diffraction), we reveal a previously unreported phenomenon: Ti-dominated ratios (1:2) enable superior strength-conductivity synergy. After 70% cold rolling and 550 °C aging, the alloy with a 2:1 Fe/Ti ratio exhibits peak hardness (166.5 HV) and conductivity (64.1% IACS), outperforming both 1:1 (173.9 HV, 51.3% IACS) and 1:2 (189.5 HV, 44.2% IACS) counterparts. Critical microstructure analysis confirms that increased Ti content promotes high-density Fe₂Ti nanoprecipitation (5-15 nm) with coherent interfaces, enhancing strength while mitigating electron scattering. This work establishes atomic ratio optimization as a novel strategy to break the traditional strength-conductivity trade-off in copper alloys, providing a 21% hardness improvement over conventional Fe-Ti systems without sacrificing essential electrical performance.

查看原文本刊更多论文

基于成分调控的Cu-Fe-Mg-Ti合金组织与性能研究

本研究系统研究了固定总Fe + Ti含量下Fe-Ti原子比（1:1、1:2和2:1）对Cu-Fe-Mg-Ti合金显微组织、力学性能和抗软化性能的影响。通过硬度测试、电导率测量和多尺度表征（光学显微镜、扫描/透射电子显微镜和x射线衍射），我们揭示了一个以前未报道的现象：钛占主导的比例（1:2）能够实现卓越的强度-电导率协同作用。经70%冷轧和550℃时效处理后，Fe/Ti比例为2:1的合金硬度峰值为166.5 HV，电导率峰值为64.1%，优于1:1 （173.9 HV, 51.3% IACS）和1:2 （189.5 HV, 44.2% IACS）的合金。关键微观结构分析证实，Ti含量的增加促进了高密度Fe2Ti纳米沉积（5-15 nm），具有相干界面，增强了强度，同时减轻了电子散射。这项工作建立了原子比优化作为一种新策略，打破了铜合金传统的强度-导电性权衡，在不牺牲基本电性能的情况下，比传统的Fe-Ti系统提供了21%的硬度提高。

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 MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

5.80

自引率

14.70%

发文量

7753

审稿时长

1.2 months

期刊介绍： Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.