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Sensitivity analysis for thickness uniformity of Al coating layer in extrusion of Mg/Al clad bar

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Title: Sensitivity analysis for thickness uniformity of Al coating layer in extrusion of Mg/Al clad bar
Authors: Tokunaga, Toko Browse this author
Szeliga, Danuta Browse this author
Matsuura, Kiyotaka Browse this author →KAKEN DB
Ohno, Munekazu Browse this author →KAKEN DB
Pietrzyk, Maciej Browse this author
Keywords: Plastic deformation
Extrusion
Coating
Cladding
Corrosion resistance
Issue Date: Sep-2015
Publisher: Springer
Journal Title: International journal of advanced manufacturing technology
Volume: 80
Issue: 1-4
Start Page: 507
End Page: 513
Publisher DOI: 10.1007/s00170-015-7019-0
Abstract: Although Mg alloys possess many attractive properties, the use of Mg alloys has been limited due to their extremely poor corrosion resistance. In the authors' previous study, they have developed a new process for Mg/Al cladding by hot extrusion with a convex die. In the extrusion process, it was found that the thickness uniformity of the Al coating layer can be controlled by changing the die angle. However, the optimal condition of the extrusion and the influences of extrusion parameters on the coating thickness uniformity remain unclear. In this study, therefore, the sensitivity analysis has been performed in order to evaluate the influences of extrusion parameters on the coating thickness uniformity. The sensitivities of the following five parameters were evaluated: (1) initial thickness of the coating material plate, (2) extrusion temperature, (3) ram speed, (4) die angle, and (5) ratio of simulated flow stress to the experimental one for pure Al. In order to perform the sensitivity analysis, the process for Mg/Al cladding was modeled. The results from the extrusion model fairly agree with the experimental results. Thus, it can be said that the present model of Mg/Al cladding process is reliable. From the sensitivity analysis, it was found that the initial thickness of the coating material plate and die angle influence on the uniformity most. The extrusion temperature, ram speed, and flow stress ratio do not have significant influences.
Rights: The final publication is available at Springer via http://dx.doi.org/10.1007/s00170-015-7019-0
Type: article (author version)
URI: http://hdl.handle.net/2115/62727
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 徳永 透子

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