On the Monotonic and Cyclic Behavior of an Al‐Mg‐Zn‐Cu‐Si Compositionally Complex Alloy

Seyed Vahid Sajadifar; Jörg Baumgartner; Marcel Krochmal; Andreas Maciolek; Marcus Klein; Moritz Rößer; Markus Graß; Hannes Fröck; Martin Fehlbier; Olaf Kessler; Stefan Böhm; Matthias Oechsner; Tobias Melz; Thomas Niendorf

doi:10.1002/adem.202300892

journal article·2023-11Open access

On the Monotonic and Cyclic Behavior of an Al‐Mg‐Zn‐Cu‐Si Compositionally Complex Alloy

Seyed Vahid Sajadifar, Jörg Baumgartner, Marcel Krochmal, Andreas Maciolek, Marcus Klein, Moritz Rößer, Markus Graß, Hannes Fröck, Martin Fehlbier, Olaf Kessler, Stefan Böhm, Matthias Oechsner, Tobias Melz, Thomas Niendorf

Advanced Engineering Materials· Volume 25· Issue 21

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Source abstract

Abstract

In present work, the monotonic and cyclic properties of a novel Al‐Mg‐Zn‐Cu‐Si compositionally complex alloy (CCA) are investigated. Microstructural studies reveal that a eutectic phase and fishbone‐type structures are embedded in the Al‐matrix. The mechanical properties of this CCA obtained under compressive loading are found to be promising. However, low ultimate strength and brittle behavior are seen under tension. The fatigue performance of the alloy in the low‐cycle fatigue (LCF) regime is poor. Microstructural features and fracture surface analysis point to the fact that the presence of brittle intermetallic phases and shrinkage defects are responsible for the poor tensile properties and inferior LCF behavior. Homogenization at 460 and 465 °C for 3 h, 6 h, and 24 h results in spheroidization of all coarse precipitates. However, the heat treatment used is unsuitable to enhance the mechanical properties of this CCA.

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Research context

Metals & alloys Materials processing

OpenAlex topics: Aluminum Alloy Microstructure Properties · Aluminum Alloys Composites Properties · Microstructure and mechanical properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Materials Engineering University of Kassel Mönchebergstraße 3 34125 Kassel Germany

Fraunhofer Institute for Structural Durability and System Reliability LBF Bartningstraße 47 64289 Darmstadt Germany

Mechanical Engineering Center for Structural Materials, State Materials Testing Institute Darmstadt (MPA), Chair and Institute for Materials Technology (IfW) Technical University of Darmstadt 64283 Darmstadt Germany

Department for Casting-Technology - GTK University of Kassel Kurt-Wolters-Str. 3 34125 Kassel Germany

Department for Cutting and Joining Manufacturing Processes University of Kassel 34125 Kassel Germany

Chair of Materials Science University of Rostock Albert-Einstein-Str. 2 18059 Rostock Germany

Competence Centre CALOR Department of Life, Light and Matter University of Rostock Albert-Einstein-Str. 25 18059 Rostock Germany

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