Enhancement Of Forming Limits Of Aluminum Alloys Using An Intermediate Heat Treatment

  • Since the lightweight material aluminum exhibits reduced formability compared to conventional steel grades, additional steps for extending the existing forming limits have to be conducted. This paper presents an innovative approach for heat treatment embedded between two cold forming steps. The application of such intermediate heat treatment may reduce the strain hardening of the material which was induced during a first cold forming step. The alloy discussed in detail is AlMg4, 5Mn (AA5182). The heat treatment, e.g. in a furnace, should take place at a predefined temperature for a certain duration. This allows a higher degree of deformation in the second forming operation. The advantages ofSince the lightweight material aluminum exhibits reduced formability compared to conventional steel grades, additional steps for extending the existing forming limits have to be conducted. This paper presents an innovative approach for heat treatment embedded between two cold forming steps. The application of such intermediate heat treatment may reduce the strain hardening of the material which was induced during a first cold forming step. The alloy discussed in detail is AlMg4, 5Mn (AA5182). The heat treatment, e.g. in a furnace, should take place at a predefined temperature for a certain duration. This allows a higher degree of deformation in the second forming operation. The advantages of this methodology can be shown by conducting tensile tests. Tensile specimens are first pre‐strained to a defined strain value and then heat treated in a way that the recrystallization of the aluminum alloy is avoided. After cooling down the samples to room temperature, further tests are conducted up to failure of the material. As a result of the experiments, stress‐strain curves dependent on the heat treatment condition are obtained. Comparing the different curves the support of the heat treatment on formability can be analyzed.show moreshow less

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Metadaten
Author:Kathleen Siefert, Marion Merklein, Winfried Nester, Martin Grünbaum
URN:urn:nbn:de:bvb:29-opus-37415
Document Type:Article
Language:English
Date of Publication (online):2012/11/05
Publishing Institution:Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Release Date:2012/11/05
Tag:aluminium alloys; forming processes; hardening; tensile strength
SWD-Keyword:-
Original publication:AIP Conference Proceedings 1315 (2011): S. 359-364. 05.11.2012 <http://proceedings.aip.org/resource/2/apcpcs/1315/1/359_1>
Institutes:Technische Fakultät / Technische Fakultät -ohne weitere Spezifikation-
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 60 Technik / 600 Technik, Technologie
PACS-Classification:70.00.00 CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES / 71.00.00 Electronic structure of bulk materials (see section 73 for electronic structure of surfaces, interfaces, low-dimensional structures, and nanomaterials; for electronic structure of superconductors, see 74.25.Jb) / 71.20.-b Electron density of states and band structure of crystalline solids / 71.20.Be Transition metals and alloys
80.00.00 INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY / 81.00.00 Materials science / 81.10.-h Methods of crystal growth; physics of crystal growth (for crystal structure, see section 61) / 81.10.Fq Growth from melts; zone melting and refining
80.00.00 INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY / 81.00.00 Materials science / 81.40.-z Treatment of materials and its effects on microstructure and properties / 81.40.Cd Solid solution hardening, precipitation hardening, and dispersion hardening; aging (see also 64.75.Nx Phase separation and segregation in solid solutions)
80.00.00 INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY / 81.00.00 Materials science / 81.40.-z Treatment of materials and its effects on microstructure and properties / 81.40.Lm Deformation, plasticity, and creep (see also 83.50.-v Deformation and flow in rheology)
Collections:Universität Erlangen-Nürnberg / Allianzlizenzen / Allianzlizenzen 2011

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