Heterogeneity of interfacial microstructure and fracture behavior of friction plug welds for 2219-T87 AlCu alloy

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Materials Characterization Pub Date : 2025-02-20 DOI:10.1016/j.matchar.2025.114864

Bo Du , Minglin He , Wenshen Tang , Xinqi Yang , Jiang Yi , Shuai Wang

{"title":"Heterogeneity of interfacial microstructure and fracture behavior of friction plug welds for 2219-T87 AlCu alloy","authors":"Bo Du , Minglin He , Wenshen Tang , Xinqi Yang , Jiang Yi , Shuai Wang","doi":"10.1016/j.matchar.2025.114864","DOIUrl":null,"url":null,"abstract":"<div><div>Bonding interface is the weakest zone in defect-free friction plug weld (FPW) of 2219 aluminum alloy. To elucidate the specific fracture mechanism, the bonding interface of the FPW joint was precisely sampled and detailed characterized in this study. The bonding interface exhibit a heterogeneous microstructure along the thickness direction of FPW joint. In the middle part of the bonding interface, the recrystallization is the most adequate and the grain size is smallest, due to the largest interfacial normal force compared with the upper and lower parts. More importantly, a coarse θ-phase layer is identified along the bonding interface in the lower part of the FPW joint. These coarse θ phases are mainly formed by the accumulation and growth of original θ phases in the matrix, due to the inadequate interfacial normal force in the lower part. Cracks are easily formed and expanded along this coarse θ-phase layer, eventually leading to the low ultimate tensile strength and elongation of the defect-free FPW joint.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"222 ","pages":"Article 114864"},"PeriodicalIF":4.8000,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Characterization","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1044580325001536","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}

引用次数: 0

Abstract

Bonding interface is the weakest zone in defect-free friction plug weld (FPW) of 2219 aluminum alloy. To elucidate the specific fracture mechanism, the bonding interface of the FPW joint was precisely sampled and detailed characterized in this study. The bonding interface exhibit a heterogeneous microstructure along the thickness direction of FPW joint. In the middle part of the bonding interface, the recrystallization is the most adequate and the grain size is smallest, due to the largest interfacial normal force compared with the upper and lower parts. More importantly, a coarse θ-phase layer is identified along the bonding interface in the lower part of the FPW joint. These coarse θ phases are mainly formed by the accumulation and growth of original θ phases in the matrix, due to the inadequate interfacial normal force in the lower part. Cracks are easily formed and expanded along this coarse θ-phase layer, eventually leading to the low ultimate tensile strength and elongation of the defect-free FPW joint.

Abstract Image

查看原文

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 Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.