Metallic Composites: Microstructure and Mechanical Properties
Dr. Arda Çetin, Mühendishane – Mühendislik Bilimleri Eğitim Merkezi
Date: Friday, May 2, 2014
Place: EA 409
This talk is organized in two parts: The first part focuses on the problem of reinforcement clustering in cast metal matrix composites. Composite microstructures often display clustered arrangements of reinforcement particles, which are detrimental for the mechanical properties. The degree of property degradation depends on the size and spatial configuration of the clusters. The first part of the talk aims at providing an understanding on the effect of dendritic solidification on reinforcement clustering and presents a quantitative characterization scheme for cluster detection in such materials. In the second part of the talk, the focus will be on the tensile elongation to failure of strain-rate dependent laminated metal composites during quasi-static deformation. It will be shown that the problem can be simplified so as to enable an approximate but convenient direct graphical deduction of the tensile elongation of ductile laminated metal composites, knowing the work hardening and strain rate hardening characteristics of the two phases making the composite. The utility of the analysis will be illustrated by an example of laminated metal composite made from steel and magnesium.
Arda Çetin is currently the managing director of Mühendishane, Mühendislik Bilimleri Eğitim Merkezi, which is a start-up focusing primarily on creating e-learning resources on Materials Science and Engineering topics. Prior to that, he was a research associate at the Swiss Federal Institute of Technology in Lausanne (EPFL, Switzerland) from 2008 to 2013, where he worked on the establishment process of a new materials research laboratory in collaboration with the University of Tokyo in Japan. He graduated in 1999 from the Department of Metallurgical and Materials Engineering at METU and received his PhD in 2008 from the same department. His research is primarily focussed on the processing, microstructure characterization and mechanical behavior of advanced metallic materials with a particular focus on metallic composites.