Grain Size Control in the Weld Pool and Heat Affected Zone Using Holograms

Weld Pool Control in Nd : YAG Laser

Robust sensing and control of the weld pool surface

Gas tungsten arc welding is the primary process for precision joining. To develop a control system for this process, a novel sensor is proposed to measure the depth of the weld pool surface using a non-transferred arc. A flat surface is periodically established to provide a real-time reference. The main-arc-on period is selected as the system’s input. Because of possible large variations/ranges...

Robust Sensing and Control of Weld Pool Surface

Gas tungsten arc welding is the primary process for precision joining of metals. To develop a simple yet durable sensing and control system for this process, a novel sensor which requires no additional attachment is proposed to sense the depth of the weld pool surface using a non-transferred arc. To assure its effectiveness and accuracy, a flat surface is periodically established to provide a r...

Behaviour of Coarse Grain Heat Affected Zone (haz) during Cycle Loading

T. Vuherer, University of Maribor, Faculty of Mechanical Engineering, Slovenia, P. Maruschak, Ternopil State Ivan Plu’uj University, Department of Material Science, Ukraine, I. Samardžić, University of Osijek, Mechanical Engineering Faculty, Slavonski Brod, Croatia This paper presents results of a study on martensitic coarse grain heat aff ected zone that can appear in welded joints. Mechanical...

تاثیر تعمیر مکرر بر ریزساختار، خواص مکانیکی و رفتار خوردگی مقاطع جوشکاری شده آلیاژ آلومینیم 321H-5083 به روش میگ پالسی

In the marine industries, defects in welded joints are repaired to improve the performance. It is possible that a welded joint is repaired once or twice. In this research, effect of repair on microstructure, mechanical properties and corrosion behavior of welded joints of 5083-H321 aluminum alloy using pulsed MIG process was investigated. The results show that excess heat due to increasing the ...