توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱a study on effect of process variables onfatigue and impact behavior and bead penetration of robotic MIG welded AA6061 aluminum alloy joints
نویسنده(ها): ، ،
اطلاعات انتشار: کنگره بین المللی جوش و روشهای اتصال، سال
تعداد صفحات: ۹
Aluminum alloys forming to AA6061 have a wide range of desirable properties which are used in different industries such as aircraft industry and other aerospace structures. The effect of processing variables on fatigue life, impact energy and bead penetration of AA6061 joints produced by MIG robotic welding process was analyzed in the present study. Different samples were obtained by employing arc voltages of 20, 23 and 26 V, welding currents of 110, 130 and 150 A, welding speeds of 50, 60 and 70 cm\min. After finishing of the welding process, the mechanical properties of the samples were evaluated by means of fatigue and impact test at room temperature and the depth of weld penetration was measured in all of geometrical specimens. Results were clearly illustrated that when heat input increases, fatigue life of weld metal decreases whereas impact energy of weld metal increases in first and then drops significantly. A linear increase in depth of penetration with increasing welding current and arc voltage was also observed. The biggest penetration in this investigation was observed for 60 cm\min welding speed<\div>

۲The study of Zn effect on the microstructure and tensile properties of cast Al–15% Mg2Si–3% Cu composite
نویسنده(ها): ، ، ،
اطلاعات انتشار: سومین کنفرانس بین‌المللی آلومینیوم ایران IIAC2014، سال
تعداد صفحات: ۵
The Al–Mg2Si composite is a typical example of an ultra light material appropriate for weight critical applications especially in aerospace and automotive industries. Unfortunately, in its original as–cast condition, the presence of coarse Mg2Si particles in the composite leads to poor tensile properties. Therefore, it seems desirable to modify the structure of the composite to improve its mechanical properties. In present research, an attempt was made to investigate the influence of different concentrations of Zn (1, 3, 5, 10 and 15 wt.%) on the microstructure and tensile properties of Al–15% Mg2Si–3% Cu metal matrix composite. The composite ingots were made by casting process. In this work, the matrix composite were characterized by optical microscopy, scanning electron microscopy (SEM). Microstructural observations showed that with the addition of Zn, the size or morphology of the primary Mg2Si phase does not change significantly but, tensile testing results revealed that the optimum Zn level for improving both UTS and elongation values is 10 wt.%.<\div>
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