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Effect of solution heat treatment on microstructure and damage accumulation in cast Al-Cu alloys

Fernádez Gutiérrez, Ricardo and Sket, Federico and Maire, Eiric and Wilde, Fabian and Boller, Elodie and Requena, Guillermo (2017) Effect of solution heat treatment on microstructure and damage accumulation in cast Al-Cu alloys. Journal of Alloys and Compounds. Elsevier. ISSN 0925-8388

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Abstract

The influence of solution treatment time on the microstructure of three cast Al-Cu alloys is investigated in terms of the effect on damage accumulation during tensile deformation at room temperature. The microstructure of the alloys is formed by an age hardenable a-Al matrix and interdendritic aluminides whose volume fraction and interconnectivity depends on the chemical composition and solution treatment time as revealed by 2D and 3D investigations. The damage accumulation process during tensile deformation is investigated in situ by synchrotron microtomography. Aluminides oriented perpendicularly to the load direction play a decisive role in damage formation and accumulation in the form of microcracks for all studied alloys and conditions. However, highly interconnected aluminides promote rapid crack propagation within these networks, indicating that the concentration of Cu should be kept <5 wt% and a solution heat treatment of 4 h at 530 °C should be applied to increase ductility of these cast alloys.

Item URL in elib:https://elib.dlr.de/115726/
Document Type:Article
Additional Information:Referierte Publikation
Title:Effect of solution heat treatment on microstructure and damage accumulation in cast Al-Cu alloys
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fernádez Gutiérrez, RicardoNemakUNSPECIFIED
Sket, FedericoIMDEAUNSPECIFIED
Maire, EiricINSA LyonUNSPECIFIED
Wilde, FabianHZGUNSPECIFIED
Boller, ElodieESRFUNSPECIFIED
Requena, GuillermoGuillermo.Requena (at) dlr.deUNSPECIFIED
Date:2017
Journal or Publication Title:Journal of Alloys and Compounds
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Publisher:Elsevier
ISSN:0925-8388
Status:Published
Keywords:Metals and alloys Synchrotron radiation Intermetallics Metallography Mechanical properties
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research
Deposited By: Requena, Guillermo
Deposited On:22 Nov 2017 09:16
Last Modified:06 Sep 2019 15:18

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