Title: A micro deep drawing of ARB processed aluminium foil AA1235

Authors: Syamsul Hadi; Anh Kiet Tieu; Cheng Lu; Hongtao Zhu

Addresses: Mechanical Engineering Department, State Polytechnic of Malang, P.O. Box 04, Malang 65100, East Java, Indonesia; School of Mechanical, Materials and Mechatronics Engineering, Faculty of Engineering, University of Wollongong, Building 8.111, Northfield Avenue, Wollongong NSW 2522, Australia ' School of Mechanical, Materials and Mechatronics Engineering, Faculty of Engineering, University of Wollongong, Northfield Avenue, Wollongong NSW 2522, Australia ' School of Mechanical, Materials and Mechatronics Engineering, Faculty of Engineering, University of Wollongong, Northfield Avenue, Wollongong NSW 2522, Australia ' School of Mechanical, Materials and Mechatronics Engineering, Faculty of Engineering, University of Wollongong, Northfield Avenue, Wollongong NSW 2522, Australia

Abstract: The flow stress of AA1235 aluminium series-H14 material of 16 to 300 µm thickness has been determined here for the first time which showed the stress reduced significantly with thickness. A stress-strain relationship has been determined as a function of the thickness and grain size. A limiting drawing ratio (LDR) of 2.003 was achieved by a subsequent heat treatment of accumulative roll bonded (ARB) materials before the micro-cup drawing. The cup was successfully formed as the combined process has reduced the planar anisotropy, increased the normal anisotropy and improved the formability of a cup.

Keywords: strength; grain size; AA1235; foil; rolling; accumulative roll bonded; ARB; micro forming; annealing; micro deep drawing; aluminium foil; flow stress; thickness; strain; limiting drawing ratio; heat treatment; cup formability.

DOI: 10.1504/IJMPT.2013.058973

International Journal of Materials and Product Technology, 2013 Vol.47 No.1/2/3/4, pp.175 - 187

Received: 24 Aug 2013
Accepted: 17 Nov 2013
Published online: 28 Jun 2014 *

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