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1

Investigation of Tensile Properties of Aluminum 6082-T6 Alloys Joined by Cold Metal Transfer Method by Using Different Working Time

100%

Ozsarac U., Işik Ş., Varol F., Emin Unat M., Özdemir C., Aslanlar S.

Acta Physica Polonica A

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2017

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vol. 132

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issue 3

705-707

EN

In this study, Aluminium 6082-T6 plates having 1.0 mm thickness were joined by magnesium-based (AlMg5) wire in cold metal transfer technique. The specimens were prepared in butt joint form. Argon was used as shielding gas and joining operations were done at gas flow speed of 13 l/min. The joining operations were carried out during four different working times of 25, 30, 35, 40 and 45 seconds. Tensile properties of joints were determined and macro-structures of joints were investigated in order to evaluate the joinability of Aluminium 6082-T6 alloy by cold metal transfer technique. Finally, the micro-hardness values of specimens were measured.

2

Effect of Double Stage Nitriding on 34CrAlNi7-10 Nitriding Steel

80%

Altinsoy İ., Çelebı Efe G., Yener T., Önder K., B∈dal C.

Acta Physica Polonica A

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2017

|

vol. 132

|

issue 3

663-666

EN

In this study, effect of double stage gas nitriding of 34CrAlNi7-10 steel was analyzed. Nitriding processes were carried out in two stages. in the first stage, samples were nitridied at 500°C for 10 h and then in second stage nitriding process was continued at 530 and 550°C for 20 h. During both stages, the nitrogen activity on surface was controlled by the nitriding potential, which is a thermodynamical control parameter for controlled gas nitriding process. The nitriding potential was kept constant, at value of 10, during the first stage and was varied in the range of 3.2-0.2, for both nitriding temperatures, in the second stage. The presence of nitrides, formed on the surface of test materials was determined by XRD analysis technique. The morphology of nitrided layer was studied by optical microscopy. The microhardness of the surfaces of nitrided samples in HV1 was between 955 and 1029. The measurements have shown that the thickness of the compound layer (white layer) has varied between 6.85-23.90 μm and that the growth of the white layer and microhardness gradient were strongly affected by the nitriding potential and the temperature. Diffusion depths as Nht(HV) for Vickers Hardness were determined and compared.

3

Explicit Analysis of Cyclic Fatigue Behavior of Poplar Wood Pallet by Computational Engineering - Von Mises Yield, Goodmen and N-S Diagram Approach

80%

Karaçalı Ö.

Acta Physica Polonica A

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2017

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vol. 131

|

issue 3

457-459

EN

Wood pallets are important carrying tools, defined in packaging engineering, for fragile or any kind of heavy goods. Wood pallets are exposed to flexural forces resulting in fracture and fatigue during transportation. In this research, the fracture and fatigue behavior of wood pallet system under loading was investigated, taking into account nail and pallet material behavior, using strain-stress distribution by computational finite element analysis. Static and dynamic numerical analysis was performed on the 3D model of poplar wood pallet using ANSYS computational system. To validate the data gathered from Von Mises yield, Goodman and N-S fatigue diagrams were established to predict fatigue life. The finite element models built in this research may assist the design engineers and manufacturers in evaluation of new design strategies of poplar wood pallets.

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3 Acta Physica Polonica A

3 2017

1 Altinsoy İ.

1 Aslanlar S.

1 B∈dal C.

1 Emin Unat M.

1 Işik Ş.

1 Karaçalı Ö.

1 Ozsarac U.

1 Varol F.

1 Yener T.

1 Çelebı Efe G.

1 Önder K.

1 Özdemir C.

Investigation of Tensile Properties of Aluminum 6082-T6 Alloys Joined by Cold Metal Transfer Method by Using Different Working Time

Effect of Double Stage Nitriding on 34CrAlNi7-10 Nitriding Steel

Explicit Analysis of Cyclic Fatigue Behavior of Poplar Wood Pallet by Computational Engineering - Von Mises Yield, Goodmen and N-S Diagram Approach