Layer architecture and fatigue life of ultrafine-grained laminated metal composites consisting of different aluminum alloys

Kümmel F, Höppel HW, Göken M (2017)

Publication Status: Published

Publication Type: Journal article

Publication year: 2017

Journal

Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing Elsevier

Publisher: ELSEVIER SCIENCE SA

Book Volume: 702

Pages Range: 406-413

DOI: 10.1016/j.msea.2017.06.105

Abstract

The influence of the layer architecture on the fatigue properties of ultrafine-grained laminated metal composites is studied. Composites with different stacking sequences of the aluminum alloys AA1050, AA5005, and AA2024 were produced by accumulative roll bonding and characterized by microstructural analysis and nanoindentation experiments. The fatigue properties were determined by 3-point bending tests performed on a vibraphore testing machine. Subsequently, the crack path was analyzed using a scanning electron microscope. It was observed that the fatigue crack bifurcates close to the interface if the hardness difference between both materials is high. The crack then spreads parallel to the interface within the softer material. This crack branching is more pronounced at high stress amplitudes caused by a significant accumulation of plastic deformation in front of the interface. Consequently, at high stress amplitudes the fatigue lives are significantly higher for composites with a high hardness difference between the layers. At low stress amplitudes, at which crack initiation is the dominating fatigue mechanism, the material of the outer layer mainly determines the fatigue lives. Composites with the same outer layer, but different interlayers, show very similar high cycle fatigue lives. Thus, by an appropriate layer architecture ultrafine-grained laminated metal composites with significantly enhanced fatigue properties can be designed.

Authors with CRIS profile

Frank Kümmel Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Heinz Werner Höppel Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Mathias Göken Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM) Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

Layered Lightweight Composites and Graded Materials (EXC315 EAM (E3)) Exzellenz-Cluster Engineering of Advanced Materials Nov. 1, 2012 - Oct. 31, 2017

How to cite

APA:

Kümmel, F., Höppel, H.W., & Göken, M. (2017). Layer architecture and fatigue life of ultrafine-grained laminated metal composites consisting of different aluminum alloys. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 702, 406-413. https://doi.org/10.1016/j.msea.2017.06.105

MLA:

Kümmel, Frank, Heinz Werner Höppel, and Mathias Göken. "Layer architecture and fatigue life of ultrafine-grained laminated metal composites consisting of different aluminum alloys." Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 702 (2017): 406-413.

BibTeX: Download