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- Title
High Lightweight Potential of Ultrafine‐Grained Aluminum/Steel Laminated Metal Composites Produced by Accumulative Roll Bonding.
- Authors
Kümmel, Frank; Diepold, Benedikt; Sauer, Kim Florian; Schunk, Christopher; Prakash, Arun; Höppel, Heinz Werner; Göken, Mathias
- Abstract
The focus of this paper is the designing of ultrafine‐grained aluminum/steel laminated metal composites for innovative lightweight materials concepts used for cyclic loading. These ultrafine‐grained composites are produced by the accumulative roll bonding process. Three different aluminum/steel composites are studied, where the position of the steel layers is varied, to investigate the influence of the layer architecture. The mechanical properties are measured in monotonic and cyclic three‐point bending tests. The influence of the meso‐ and microstructure are intensively studied by scanning electron microscope observations. Furthermore, the internal stresses during elastic straining are calculated by a finite element simulation. In the composites, both monotonic and cyclic mechanical properties are strongly increased and are clearly higher as expected by a linear rule of mixtures of the constituent materials. This increase is particularly high for the fatigue properties resulting in a strongly enhanced specific fatigue limit of the composites. The focus of this paper is the designing of ultrafine‐grained (UFG) aluminum/steel (AA5754/DC05) laminated metal composites for innovative lightweight materials concepts used for cyclic loading. Three different composites are produced, where the distance of the steel layers to the outer surface is gradually reduced (L1/4, L1/8, L0). The most favorable layer architecture strongly depends on the applied cyclic stress amplitude. At higher stress amplitudes, the composite with surface layers of steel (L0) reveal the longest fatigue lives. However, at lower stress amplitudes, the composite with aluminum as outer layers and a near surface steel layers (L1/8) shows the best fatigue life.
- Subjects
METALLIC composites; FATIGUE cracks
- Publication
Advanced Engineering Materials, 2019, Vol 21, Issue 1, pN.PAG
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.201800286