Macro- and nanomechanical properties and strain rate sensitivity of accumulative roll bonded and equal channel angular pressed ultrafine-grained materials

Boehner A, Maier V, Durst K, Höppel HW, Göken M (2011)

Publication Type: Journal article

Publication year: 2011

Journal

Advanced Engineering Materials Wiley

Book Volume: 13

Pages Range: 251-255

Journal Issue: 4

DOI: 10.1002/adem.201000270

Abstract

Several processes of severe plastic deformation are suitable for the production of materials with ultrafine-grained microstructures which are known to exhibit high strength and often good ductility as well as strain rate sensitive behavior. The most promising ones are equal channel angular pressing (ECAP) for bulk material and accumulative roll bonding (ARB) for the production of sheet material. In order to evaluate the influence of the process on these mechanical properties and the strain rate sensitivity, tensile tests, and nanoindentation tests were performed on material produced up to similar effective plastic strains of \textgreekeARB = 6.4 and \textgreekeECAP = 6.3. It could be shown that the macroscopic strength is slightly higher for ARB than for ECAP material and vice versa in nanoindentation. Independent of the testing method, the strain rate sensitivities and activation volumes are similar for both materials. Thus, both processes performed up to similar effective plastic strains lead to comparable improvements in the mechanical properties. Additionally it could be shown, that this comparison allows the identification of the dominant deformation mechanism which is responsible for the observed strain rate sensitivity.

Authors with CRIS profile

Verena Maier Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Karsten Durst 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 Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

Stabilität und Optimierung der mechanischen Eigenschaften ultrafeinkörniger Werkstoffe (FOR 544) FOR 544: Mechanische Eigenschaften und Grenzflächen ultrafeinkörniger Werkstoffe Jan. 1, 2004 - Dec. 31, 2011

How to cite

APA:

Boehner, A., Maier, V., Durst, K., Höppel, H.W., & Göken, M. (2011). Macro- and nanomechanical properties and strain rate sensitivity of accumulative roll bonded and equal channel angular pressed ultrafine-grained materials. Advanced Engineering Materials, 13(4), 251-255. https://doi.org/10.1002/adem.201000270

MLA:

Boehner, Andreas, et al. "Macro- and nanomechanical properties and strain rate sensitivity of accumulative roll bonded and equal channel angular pressed ultrafine-grained materials." Advanced Engineering Materials 13.4 (2011): 251-255.

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