Abstract
This study was conducted to investigate the effect of low-density polyethylene on the microstructural and mechanical properties of 3105 aluminum composites produced by the continuous hot-press method. This production method ensures superior flatness to the composite and excellent peel strength between the composite plies. To this end, the bond between AA3105 and low-density polyethylene was initially characterized using a T-Peel stripping test. Tensile tests were performed on AA3105, low-density polyethylene and 3105 aluminum composites for determining mechanical behavior. A scanning electron microscope was used to characterize the cross-sectional cuts of the 3105 aluminum composite specimens obtained from the tensile tests. The microstructural analysis shows that low-density polyethylene and AA3105 exhibit a good interfacial adhesion bond before the fracture of the first AA3105 sheet. The results of the tensile tests clearly show that the uniform elongation at maximum load (Ag) of the 3105 aluminum composite is higher than that of AA3105. Furthermore, AA3105 exhibits negative strain rate sensitivity due to dynamic strain aging while 3105 aluminum composite exhibits a higher strain-hardening exponent than AA3105. Due to the higher strain rate sensitivity and strain hardening exponent, the 3105 aluminum composite exhibits higher formability than AA3105. This is of crucial importance for the manufacturing process.
About the authors
Sadam Hamis Wapande, born in 1990, received his BSc degree in mechanical Engineering at Erciyes University, Turkey in 2015 with Honors as third best graduate in his department. From 2016 to 2019, he studied at a joint master’s program in Manufacturing Technology between the TU Dortmund University, Germany and the Turkish-German University, Turkey. During his master studies, he worked on formability analysis of various aluminium composites.
Assistant Prof. Dr.-Ing. Cagatay Elibol received his BSc degree in Metallurgical and Materials Engineering at the University of Kocaeli, Turkey, with Honors as best graduate of the academic year 2007, and his Dipl.-Ing. degree in Materials Science from the University of Stuttgart in cooperation with the Max Planck Institute for Intelligent Systems, Germany, in 2011. He received a PhD with highest honors (summa cum laude) from the Faculty of Mechanical Engineering at the University of Technology Chemnitz, Germany in 2018. After over 10 years of education and work experience in Germany, Dr.-Ing. Cagatay Elibol has been working in the Department of Materials Science and Technology at the Turkish-German University, Istanbul/Turkey since May 2018. Currently, he is Head of the Division of Electronic Materials and Vice Dean of the Faculty of Science at the same university. His main focus is in the field of mechanical characterization and the deformation behavior analysis of shape memory alloys using in situ optical strain mapping techniques and of lightweight hybrid structures/ composites. Under his supervision, Mr. Wapande carried out the scientific research presented in this work as a part of his master thesis.
Murat Konar, born in 1990, graduated from Zonguldak Karaelmas University, Turkey in 2013 with B. Sc. degree in Mechanical Engineering. Between 2015 and 2017, he studied for his a Master’s degree in Production Engineering at Sakarya University, Turkey. He is currently working on this Doctorate degree in Production Engineering at Sakarya University, Turkey. Since 2015, he has been working as a Research and Development Engineer at the ASAS Aluminum Company, Turkey with a focus on die design and aluminum extrusion.
Acknowledgement
This research was carried out as a part of master thesis research work by Sadam Hamis Wapande under the supervision of Prof. Dr.-Ing. Dr.-Ing. E.h. A. Erman Tekkaya from the TU Dortmund, Germany and Dr.-Ing. Cagatay Elibol from the Turkish-German University, Turkey. The authors would like to thank the Institute of Forming Technology and Lightweight Components (IUL) of the TU Dortmund and the research and development department of the ASAS Aluminum Company (Sakarya, Turkey) for providing test materials and testing machines. Special thanks to Gorkem Ozcelik, M. Bugra Guner and M. Serkan Ozcan for their support in this work.
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