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3D morphology of the petal-like precipitates in Cu-Fe alloys: Experimental study and phase field modelling
aSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China.
bGPM, UMR CNRS 6634, Université de Rouen-Normandy, 76575 Saint Étienne du Rouvray, France, 76575 Saint Étienne du Rouvray.
aSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China.
aSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; cState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, PR China.
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2024 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 270, article id 119874Article in journal (Refereed) Published
Abstract [en]

Precipitation hardening is a well-known phenomenon which is widely harnessed in alloy design strategy. In particular, the microstructural features such as shape, size, precipitate number density and volume fraction determine the mechanical behaviour of materials. During service, the morphology of precipitates sometimes achieves a complex 3D shape upon displaying branching and/or splitting patterns. Unfortunately, the detailed information about this intricate morphology cannot be retrieved through traditional experimental techniques based on 2D visualization. Here, we report the implementation of a 3D analysis technique combining Focused Ion Beam (FIB) and Scanning Electron Microscopy (SEM) tomography to visualize the atypical petal-like morphology of Fe-rich precipitates in a Cu-Fe alloy. Using Phase-Field modelling (PFM), we identify the mechanism responsible for the unusual morphologies of Fe-rich particles. Our work highlights the significance of 3D characterization of precipitates and provides a fascinating pathway for refining understanding of precipitation mechanisms in metals and alloys.

Place, publisher, year, edition, pages
Elsevier BV , 2024. Vol. 270, article id 119874
Keywords [en]
3D tomography, Copper alloys, Morphological stability, Phase field modelling, Precipitation
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-345739DOI: 10.1016/j.actamat.2024.119874Scopus ID: 2-s2.0-85189451223OAI: oai:DiVA.org:kth-345739DiVA, id: diva2:1852515
Note

QC 20240418

Available from: 2024-04-18 Created: 2024-04-18 Last updated: 2024-04-18Bibliographically approved

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Mao, Huahai

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