This study aims to detect the impact of preexfoliation corrosion on efficiency 2 mm thick 2024-T3 aluminum alloy friction stir spot welded (FSSW) joints. Five specimens FSSW joints, with 620 r·min−1 rotational speed and a dwell time 10 seconds, were immersed in an exfoliation solution for five different times: h, 20 30 40 50 h. The tensile shear load noncorroded joint was 3.5 kN. results showed...

We present the results of the first sensitive L band (3.4 μm) imaging study of the nearby young embedded cluster NGC 2024. Two separate surveys of the cluster were acquired in order to obtain a census of the circumstellar disk fraction in the cluster. We detected 257 sources to the mL ≤ 12.0 completeness limit of our ∼110 arcmin primary survey region. An additional 26 sources with 12.0 < L < 14...

The aim of this study was to predict the temperatures on all surfaces three-dimensional models using ANSYS 15.0 program. Firstly, from welding centre edges two aluminium alloys (AA-7075 &amp; AA-2024) welded by friction stir process were perceived. Secondly, distribution start its end and derivation equations with time spent in process, along distance observed at different travel speeds cart (T...

The friction stir welding process has been used to join 13mm gauge 2024-T351 aluminium alloy plates together. A detailed microstructural study of the resulting weld was carried out using Differential Scanning Calorimetry (DSC), hardness testing, Scanning Electron Microscopy (SEM) and Electron Backscatter Diffraction (EBSD). DSC was used to explain the hardness results at a number of regions acr...