Backward rod extrusion of bimetallic aluminum-copper alloys at room temperature
Abstract
The backward rod extrusion of bimetallic aluminum-copper alloys at room temperature was investigated. The aluminum alloy EN AW-1080A and the copper alloy Cu-ETP were selected to prepare the core and sleeve of the billet respectively. The copper cross section was equivalent to 30% of the billet. Moreover, the billet was extruded applying a conic die angle of 90° and an extrusion ratio of 14:1. Experimental results demonstrated that the combination of grounding marks on the die surface and the application of graphite foil reduced drastically the friction between copper and the conic die. Thus, a uniform material flow of aluminum and copper through the bearing channel was observed during the steady state of the extrusion process. However multiple fractures of the copper sleeve occurred at the end of the process. The extrusion process was numerically simulated applying the FEM-based software Deform 2D in order to estimate the state variables and material flow. The die and punch temperature evolution, as well as the die extrusion force were recorded during the whole process to facilitate the validation of the numerical analysis.
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Both alloys revealed a low strain rate sensitivity in hot compression tests.
“As both alloys revealed a low strain rate sensitivity in hot compression tests (Kang et al., 2002;Berski et al., 2006;Sanabria et al., 2019), only small influence of ram speed was expected and a wide range of ram speed (5-19 mm/s) was defined.”
From Optimization of the Indirect Extrusion Process of Copper-Clad Aluminum Rods by Methods of Statistical Experimental Designs and Numerical Analyses (2021) · cites this paper as Sanabria et al., 2019
An anisothermal setup reduces the flow stress ratio of the billet materials.
“As mentioned earlier, an anisothermal setup reduces the flow stress ratio of the billet materials.”
From Optimization of the Indirect Extrusion Process of Copper-Clad Aluminum Rods by Methods of Statistical Experimental Designs and Numerical Analyses (2021) · cites this paper as Sanabria et al., 2019
An increase of container temperature enabled an improvement of process stability and sleeve integrity compared to the trial of Sanabria et al. (2019).
“an increase of that enabled an improvement of process stability and sleeve integrity compared to the trial of Sanabria et al. (2019).”
From Optimization of the Indirect Extrusion Process of Copper-Clad Aluminum Rods by Methods of Statistical Experimental Designs and Numerical Analyses (2021) · cites this paper as Sanabria et al. (2019)
Good lubrication is essential to the process according to previous investigations.
“To sustain good lubrication, which is essential to the process according to the findings of previous investigations (Sanabria et al., 2019;Kuhnke et al., 2020a)”
From Optimization of the Indirect Extrusion Process of Copper-Clad Aluminum Rods by Methods of Statistical Experimental Designs and Numerical Analyses (2021) · cites this paper as Sanabria et al., 2019
The strain-stress curves reveal a low strain rate sensitivity for both copper CW004A and aluminum EN AW-1080A.
“The strain-stress curves, provided by Sanabria et al., reveal a low strain rate sensitivity for both copper CW004A and aluminum EN AW-1080A [8].”
From Influence of Die Surface Topography and Lubrication on the Product Quality during Indirect Extrusion of Copper-Clad Aluminum Rods (2020) · cites this paper as [8]
Cited by
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Kuhnke, S., Gensch, F., Nitschke, R., Sanabria, V., & Mueller, S. (2020) · Metals · doi:10.3390/met10070888 · Cited by 13 · see citing works
Self-citationNumerical Investigations on Material Flow During Indirect Extrusion of Copper-Clad Aluminum Rods
Kuhnke, S., Sanabria, V., Gensch, F., Nitschke, R., & Mueller, S. (2020) · Frontiers in Materials · doi:10.3389/fmats.2020.00157 · Cited by 11 · see citing works
Self-citationLechner, S., Rœmisch, U., Nitschke, R., Gensch, F., & Mueller, S. (2021) · Frontiers in Materials · doi:10.3389/fmats.2021.663306 · Cited by 6 · see citing works
Self-citation
- Authors
- Sanabria, V., Gall, S., Gensch, F., Nitschke, R., & Mueller, S.
- Affiliations
- Technische Universität Berlin (DE)
- Corresponding author
- Sanabria, V.
- Venue
- AIP Conference Proceedings
- Publisher
- AIP Publishing
- Published
- 2019
- Volume
- 2113
- Pages
- 030001
- ISSN
- 0094-243X (ISSN-L)
- OpenAlex
- W2954597239
- Cited by
- 6
- References
- 0
- Citations by year
- 2026: 1 · 2022: 2 · 2021: 1 · 2020: 2
- FWCI
- 3.39
- Type
- conference paper
- Language
- en
- Open access
- closed
- Locations
- AIP conference proceedings (publishedVersion)
- Funders
- Deutsche Forschungsgemeinschaft
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Metal Forming Simulation Techniques
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Welding Techniques Analysis
- Physical Sciences › Engineering › Mechanics of Materials › Metallurgy and Material Forming
- Keywords
- bimetallic alloys, conical die, material flow, extrusion force, finite element analysis
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