Finite element analysis of orthogonal metal cutting operations

Usta, Mustafa


Finite element modeling of stress evolution in quenching process
Doğu, Doruk; Gür, Cemil Hakan; Department of Metallurgical and Materials Engineering (2005)
In this thesis the finite element computer code QUEANA simulating the quenching of axisymetric parts and determining the residual stress state was improved by adding pre- and post-processors. The code was further verified by additional numerical experiments and comparison of the results with commercial software أMARCؤ. The possible applications of this code are optimization of industrial quenching processes by controlling the evolution of internal stresses and dimensional changes.
Non-equilibrium molecular dynamics of electromigration in aluminum and its alloys
Şen, Fatih Gürçağ; Aydınol, Mehmet Kadri; Department of Metallurgical and Materials Engineering (2006)
With constant miniaturization of integrated circuits, the current densities experienced in interconnects in electronic circuits has been multiplied. Aluminum, which is widely used as an interconnect material, has fast diffusion kinetics under low temperatures. Unfortunately, the combination of high current density and fast diffusion at low temperatures causes the circuit to fail by electromigration (EM), which is the mass transport of atoms due to the momentum transfer between conducting electrons and diffu...
Microstructural and mechanical characterization of metal active gas welded joint between cast iron and low carbon steel
Ertürk, Murat Tolga; Gürbüz, Rıza; Batıgün, Caner; Department of Metallurgical and Materials Engineering (2011)
This study focuses on joining pearlitic ductile cast iron with low carbon steel by welding and investigation of this joint in microstructural and mechanical viewpoints. For this purpose E355 steel and GJS600-3 cast iron were joined using metal active gas (MAG) welding process by G3Si1 filler wire. The joining process is shaped mainly by the problems related to the low weldability of cast. Preheating was applied to prevent formation of cooling cracks and effects of post weld heat treatments (PWHT) were surve...
Microstructural and elecrochemical characterization of Ti-6A1-4V ELI alloy
Topçuoğlu, Melih; Aydınol, Mehmet Kadri; Department of Metallurgical and Materials Engineering (2006)
In this study, the evolution of structure and the relationship between microstructure and corrosion behavior of the Ti-6Al-4V ELI (Extra Low Interstitial) alloy was investigated in Ringer’s solution at 37 ± 0.1 oC. Initially, different heat treatments were performed in order to obtain several microstructures which were; Widmanstätten α for furnace cooling (FC), basket-weave α for air cooling (AC), martensite (α') for water quenching (WQ) from 1060 oC, and aged martensite for ten hours at 500, 600, 700, 800,...
Theoretical and experimental investigation of bulk glass forming ability in bulk amorphous alloy systems
Ayas, Can; Mekrabov, Amdulla O.; Department of Metallurgical and Materials Engineering (2005)
In this study molecular dynamics simulation program in NVT ensemble using Velocity Verlet integration was written in order to investigate the glass forming ability of two metallic systems. The Zn-Mg system, one of the frontiers of simple metal-metal metallic glasses and Fe-B, inquiring attention due to presence of many bulk glass forming alloy systems evolved from this binary with different alloying element additions. In addition to this, atomistic calculations on the basis of ordering were carried out for ...
Citation Formats
M. Usta, “Finite element analysis of orthogonal metal cutting operations,” Ph.D. - Doctoral Program, Middle East Technical University, 1999.