Effect of gap distance on the mechanical properties and cross-sectional characteristics of the MIG-MAG butt wells

Kaşıkçı, İlker
This study was undertaken with the objective of determining the effect of gap distance on the weld bead geometry and the mechanical properties of the weldments. Low-alloyed and low carbon steel plates were welded under different conditions where each weldment had different gap distance and weld bead grooves. The influences of welding parameters namely, welding speed, current and voltage on the weld bead were examined in terms of weld bead penetration and heat affected zone and weld metal zone hardness variations.


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In this study, Polytetrafluoroethylene (PTFE) was added to catalyst layer structure. This modification was aimed at facilitating excess water removal from the cathode catalyst layer with high Pt loading (1.2 mg/cm(2)). The weight percentage of PTFE in the catalyst inks varied from zero to 30. Membrane electrode assemblies were prepared with a commercial catalyst containing 70 wt % Pt on carbon, by ultrasonic spray coating technique. PEM fuel cell performance testing was carried out with two different membra...
S235 Çeliğinin MAG Köşe Kaynağında Farklı Sabitleme Noktalarına Bağlı Gelişen Çarpılma Eğilimlerinin Sonlu Elemanlar Yöntemi ile Tahmin Edilmesi
Bedir, Elif; Batıgün, Caner; Gür, Cemil Hakan (null; 2015-11-21)
Bu çalışmada, S235 yapı çeliği plakalarına uygulanan MAG köşe kaynağı işlemi esnasında kullanılan sabitleme sisteminin yapıda meydana gelen deformasyon eğilimi üzerindeki etkisi incelenmiş ve deformasyonun önceden tayin edilebilirliği tartışılmıştır. Uygulanan sabitleme düzeninin yapıda kapladığı hangi faktörlere bağlı olduğu anlaşılmaya çalışılmıştır. Farklı sabitleme sistemleri kullanılarak MAG kaynağına tabi tutulan S235 tipi çelik plakalarda meydana gelecek olan deformasyon, “Weld Planner” yazılımı kull...
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Ozturk, Ilhan; Cetin, Cenk; Yavuz, Mehmet Metin (Informa UK Limited, 2019-01-01)
In the current study, effects of two different underhood geometry modifications namely; fan position relative to shroud and fan tip clearance, on airflow through an agricultural tractor engine cooling system are investigated by utilizing CFD modeling. For the characterization of each modification, the underhood components are reduced to a domain of cooling systems including only fan, shroud, and radiator that allows saving in computational time and cost. The models are validated using a custom designed unde...
Citation Formats
İ. Kaşıkçı, “Effect of gap distance on the mechanical properties and cross-sectional characteristics of the MIG-MAG butt wells,” M.S. - Master of Science, Middle East Technical University, 2003.