Al-Mg-Sc-Zr合金核壳析出的异常SAXS和APT研究

IF 9.3 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Acta Materialia Pub Date : 2025-10-09 DOI:10.1016/j.actamat.2025.121593

I. Amedeo , N. Kirby , P. Mota Santiago , F. De Geuser , M. Perez , S. Cazottes , T. Dorin

{"title":"Al-Mg-Sc-Zr合金核壳析出的异常SAXS和APT研究","authors":"I. Amedeo , N. Kirby , P. Mota Santiago , F. De Geuser , M. Perez , S. Cazottes , T. Dorin","doi":"10.1016/j.actamat.2025.121593","DOIUrl":null,"url":null,"abstract":"<div><div>Understanding the compositional evolution of core–shell <span><math><msub><mrow><mi>L1</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> <span><math><msub><mrow><mi>Al</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>(Sc,Zr) precipitates in aluminium alloys is critical for tailoring their mechanical performance. In this study, we combine atom probe tomography (APT) and anomalous small-angle X-ray scattering (ASAXS) to characterise, for the first time, the in situ chemical evolution of these precipitates during a two-step ageing treatment. APT confirms the sequential formation of a Sc-rich core followed by a Zr-enriched shell, while ASAXS, conducted near the Zr K-edge, enables time-resolved tracking of Zr incorporation during precipitation. Two alloys with and without Mg were compared to investigate the effects of Mg on the precipitation kinetics, morphology of precipitates and strengthening behaviour.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"301 ","pages":"Article 121593"},"PeriodicalIF":9.3000,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Anomalous SAXS and APT investigation of core–shell precipitation in Al–Mg–Sc–Zr alloys\",\"authors\":\"I. Amedeo , N. Kirby , P. Mota Santiago , F. De Geuser , M. Perez , S. Cazottes , T. Dorin\",\"doi\":\"10.1016/j.actamat.2025.121593\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Understanding the compositional evolution of core–shell <span><math><msub><mrow><mi>L1</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> <span><math><msub><mrow><mi>Al</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>(Sc,Zr) precipitates in aluminium alloys is critical for tailoring their mechanical performance. In this study, we combine atom probe tomography (APT) and anomalous small-angle X-ray scattering (ASAXS) to characterise, for the first time, the in situ chemical evolution of these precipitates during a two-step ageing treatment. APT confirms the sequential formation of a Sc-rich core followed by a Zr-enriched shell, while ASAXS, conducted near the Zr K-edge, enables time-resolved tracking of Zr incorporation during precipitation. Two alloys with and without Mg were compared to investigate the effects of Mg on the precipitation kinetics, morphology of precipitates and strengthening behaviour.</div></div>\",\"PeriodicalId\":238,\"journal\":{\"name\":\"Acta Materialia\",\"volume\":\"301 \",\"pages\":\"Article 121593\"},\"PeriodicalIF\":9.3000,\"publicationDate\":\"2025-10-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Materialia\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1359645425008791\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Materialia","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359645425008791","RegionNum":1,"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

摘要

了解铝合金中L12L12 Al3Al3（Sc,Zr）核壳相的组成演变对调整铝合金的力学性能至关重要。在这项研究中，我们结合了原子探针断层扫描（APT）和异常小角度x射线散射（ASAXS），首次表征了这些沉淀在两步老化处理过程中的原位化学演化。APT证实了富sc核心随后是富Zr壳层的顺序形成，而ASAXS在靠近Zr k边缘进行，能够在沉淀过程中对Zr掺入进行时间分辨跟踪。比较了含Mg和不含Mg两种合金，研究了Mg对合金析出动力学、析出相形态和强化行为的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Anomalous SAXS and APT investigation of core–shell precipitation in Al–Mg–Sc–Zr alloys

查看原文本刊更多论文

Anomalous SAXS and APT investigation of core–shell precipitation in Al–Mg–Sc–Zr alloys

Understanding the compositional evolution of core–shell

{L1}_{2}

{Al}_{3}

(Sc,Zr) precipitates in aluminium alloys is critical for tailoring their mechanical performance. In this study, we combine atom probe tomography (APT) and anomalous small-angle X-ray scattering (ASAXS) to characterise, for the first time, the in situ chemical evolution of these precipitates during a two-step ageing treatment. APT confirms the sequential formation of a Sc-rich core followed by a Zr-enriched shell, while ASAXS, conducted near the Zr K-edge, enables time-resolved tracking of Zr incorporation during precipitation. Two alloys with and without Mg were compared to investigate the effects of Mg on the precipitation kinetics, morphology of precipitates and strengthening behaviour.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Acta Materialia 工程技术-材料科学：综合

CiteScore

16.10

自引率

8.50%

发文量

801

审稿时长

53 days

期刊介绍： Acta Materialia serves as a platform for publishing full-length, original papers and commissioned overviews that contribute to a profound understanding of the correlation between the processing, structure, and properties of inorganic materials. The journal seeks papers with high impact potential or those that significantly propel the field forward. The scope includes the atomic and molecular arrangements, chemical and electronic structures, and microstructure of materials, focusing on their mechanical or functional behavior across all length scales, including nanostructures.