Liu Fei, Bai Pucun, Hou Xiaohu, Tong Naiqiang, Cui Xiaoming
{"title":"Transmission Electron Microscopic Observation of a Novel Al3Zr-η′ Core-shell Particle in Al-Zn-Mg-Cu Alloy","authors":"Liu Fei, Bai Pucun, Hou Xiaohu, Tong Naiqiang, Cui Xiaoming","doi":"10.1016/S1875-5372(18)30231-5","DOIUrl":null,"url":null,"abstract":"<div><p>The Al<sub>3</sub>Zr-<em>η</em>′ core-shell particles were observed in the Al-12Zn-2.4Mg-1.1Cu-0.5Ni-0.2Zr alloy using high-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED). Two types of Al<sub>3</sub>Zr particles appear in the Al matrix: one is a standalone Al<sub>3</sub>Zr particle that is coherent with the matrix, and the other is an as-core Al<sub>3</sub>Zr particle acting as a nucleation site of the <em>η</em>′ precipitates, resulting in a core-shell particle which is semi-coherent with the matrix. The shell is composed of <em>η</em>′ precipitates with four variants. The strain in the as-core Al<sub>3</sub>Zr is lower than that in the standalone Al<sub>3</sub>Zr, and a considerable amount of strain exists across the interfacial regions between the <em>η</em>′ precipitates and the matrix.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 11","pages":"Pages 3272-3276"},"PeriodicalIF":0.6000,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30231-5","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"稀有金属材料与工程","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1875537218302315","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 4
Abstract
The Al3Zr-η′ core-shell particles were observed in the Al-12Zn-2.4Mg-1.1Cu-0.5Ni-0.2Zr alloy using high-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED). Two types of Al3Zr particles appear in the Al matrix: one is a standalone Al3Zr particle that is coherent with the matrix, and the other is an as-core Al3Zr particle acting as a nucleation site of the η′ precipitates, resulting in a core-shell particle which is semi-coherent with the matrix. The shell is composed of η′ precipitates with four variants. The strain in the as-core Al3Zr is lower than that in the standalone Al3Zr, and a considerable amount of strain exists across the interfacial regions between the η′ precipitates and the matrix.
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