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  • Article
    Creative Design Engineering Education for Human-Society Integrated Intelligent Systems
    (Sage Publications Inc, 2026) Erden, Zuhal; Erden, Abdulkadir
    The essence and vital roots of scientific activities create theoretical propositions and models that provide unique integrity of the associated concepts, definitions, approaches and methodological components. Design engineering education has made great progress to date by integrating modern methods and tools into the existing process models focused on unique curriculum programs for students' progress during various scientific and technical levels. Contemporary and integrated socio-scientific environments, however, are generally more productive and initiative for future success stories of engineering graduates with high qualifications and science/technology-motivated professional life. Today's global transition from the "industrial-digital age" to the "sustainable knowledge economy and digital society" opens a new path for design engineering education, enforcing a paradigm shift towards training creative professionals who develop and implement new knowledge in real-world social environments. This paper presents and discusses the models, methods and tools to establish a road-map into next-generation creative design engineering education paradigm.
  • Article
    Citation - WoS: 36
    Citation - Scopus: 42
    Geometry and Surface Damage in Micro Electrical Discharge Machining of Micro-Holes
    (Iop Publishing Ltd, 2009) Ekmekci, Buelent; Sayar, Atakan; Opoz, Tahsin Tecelli; Erden, Abdulkadir
    Geometry and subsurface damage of blind micro-holes produced by micro electrical discharge machining (micro-EDM) is investigated experimentally to explore the relational dependence with respect to pulse energy. For this purpose, micro-holes are machined with various pulse energies on plastic mold steel samples using a tungsten carbide tool electrode and a hydrocarbon-based dielectric liquid. Variations in the micro-hole geometry, micro-hole depth and over-cut in micro-hole diameter are measured. Then, unconventional etching agents are applied on the cross sections to examine micro structural alterations within the substrate. It is observed that the heat-damaged segment is composed of three distinctive layers, which have relatively high thicknesses and vary noticeably with respect to the drilling depth. Crack formation is identified on some sections of the micro-holes even by utilizing low pulse energies during machining. It is concluded that the cracking mechanism is different from cracks encountered on the surfaces when machining is performed by using the conventional EDM process. Moreover, an electrically conductive bridge between work material and debris particles is possible at the end tip during machining which leads to electric discharges between the piled segments of debris particles and the tool electrode during discharging.