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Thermo-mechanical Material Characterization and Stretch-bend Forming of AA6016
RISE - Research Institutes of Sweden, Materials and Production, IVF. Luleå University of Technology, Sweden.
RISE - Research Institutes of Sweden, Materials and Production, IVF. Luleå University of Technology, Sweden.ORCID iD: 0000-0002-1432-444x
Luleå University of Technology, Sweden.
Luleå University of Technology, Sweden.
2018 (English)In: IOP Conference Series: Materials Science and Engineering, ISSN 1757-8981, E-ISSN 1757-899X, Vol. 418, no 1Article in journal (Refereed) Published
Abstract [en]

Lightweight design has become increasingly in focus for the manufacturing industry. Global environmental challenges, goals and legislations imply that lighter and sustainable products are imperative to remain competitive. One example is stamped products made of aluminum alloys which are of interest to the automotive industry, where lightweight designs are essential. In order to increase formability and to produce more complex geometries in stamped aluminum components there is a need to develop hot forming techniques. The Finite Element Method (FEM) has enabled important advances in the study and design of competitive manufacturing procedures for metal parts. Predicting the final geometry of a component is a complex task, especially if the forming procedure occurs at elevated temperatures. This work presents selected results from thermo-mechanical material testing procedures, FE-analyses and forming validation tests in AA6016 material. The material tests are used to determine the thermo-mechanical anisotropic properties, strain rate sensitivity and formability (Forming Limit Curves, FLC) at temperatures up to 490°C. Stretch-bending tests are performed to compare predicted results with experimental observations such as punch force, strain levels, thinning, forming temperatures, springback and failure. It was found that the heat-treatment and forming at elevated temperatures substantially increased formability and that measured responses could in general be predicted if care was taken to model the initial blank temperatures, heat transfer and thermo-mechanical material properties. The room temperature case confirms the importance of considering anisotropy. © Published under licence by IOP Publishing Ltd.

Place, publisher, year, edition, pages
Institute of Physics Publishing , 2018. Vol. 418, no 1
Keywords [en]
Aluminum alloys; Anisotropy; Automotive industry; Bending tests; Deep drawing; Drawing (forming); Heat transfer; Strain rate; Sustainable development, Aluminum components; Anisotropic property; Competitive manufacturing; Elevated temperature; Environmental challenges; Manufacturing industries; Strain rate sensitivity; Sustainable products, Bending (forming)
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:ri:diva-35529DOI: 10.1088/1757-899X/418/1/012022Scopus ID: 2-s2.0-85054260019OAI: oai:DiVA.org:ri-35529DiVA, id: diva2:1259560
Note

 Conference of 37th International Deep Drawing Research Group Conference - Forming of High Performance Sheet Materials and Components, IDDRG 2018 ; Conference Date: 3 June 2018 Through 7 June 2018; Conference Code:139914

Available from: 2018-10-30 Created: 2018-10-30 Last updated: 2019-06-28Bibliographically approved

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Perez Caro, Lluis

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