رسالة جامعية
Istraživanje uticaja parametara zavarivanja trenjem sa mešanjem na dinamičku izdržljivost zavarenog spoja legure aluminijuma 2024 T351
| العنوان: | Istraživanje uticaja parametara zavarivanja trenjem sa mešanjem na dinamičku izdržljivost zavarenog spoja legure aluminijuma 2024 T351 |
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| المؤلفون: | Milčić, Miodrag D. |
| المساهمون: | Anđelković, Boban, Kramberger, Janez, Grabulov, Vencislav, Banić, Milan, Mijajlović, Miroslav |
| المصدر: | Универзитет у Нишу |
| بيانات النشر: | Универзитет у Нишу, Машински факултет |
| سنة النشر: | 2020 |
| المجموعة: | NaRDuS (National Repository of Dissertations in Serbia) / Nacionalni Repozitorijum Disertacija u Srbiji |
| مصطلحات موضوعية: | Zavarivanje trenjem sa mešanjem, Legura aluminijuma 2024 T351, Parametri zavarivanja, Mehanička svojstva zavarenih spojeva, Visokociklični zamor, Elasto-plastična mehanika loma, Zamorna prslina, Friction stir welding, Aluminum alloy 2024 T351, Welding parameters, Mechanical properties of welded joints, High-cycle fatigue, Elastic-plastic fracture mechanics, Fatigue crack |
| الوصف: | In order to ensure a quality welded joint, and thus safe operation and high reliability of the welded part or structure achieved by friction stir welding, it is necessary to select the optimal welding parameters. The parameters of friction stir welding significantly affect the structure of the welded joint, and thus the mechanical properties of the welded joint. Investigation of the influence of friction welding parameters was performed on 6 mm thick plates of aluminum alloy AA 2024 T351. The quality of the welded joint is predominantly influenced by the number of tool revolutions speed n and the welding speed v. In this research, it was adopted that the number of tool revolutions be constant n=750 rpm, and the welding speed changed (v=73, 116 and 150 mm / min). Imperfections of the face and roots of the welded specimens were not determined on all welded work pieces by the visual method. Not a single welded sample, examined by radiographic examination, have not been founded welding defects. Experimental investigations of the macro and micro-structure of welded joints achieved by different welding parameters were performed, followed by tests of mechanical properties of welded joints: tensile testing, bending testing, Charpy impact testing, fracture mechanics parameters testing, fatigue crack growth rate and fatigue testing of welded joints. The efficiency of welded joints for welding parameter B-750/116 is almost 100%, that is the tensile strength of the welded joint is approximately equal to the tensile strength of the base metal. Welded joints are not suitable for bending stresses according to the results of bending tests under static and dynamic loading conditions. By Charpy impact testing of welded joints using an instrumented pendulum, fairly low values of impact energy were obtained for all welded joints with generated notch in different positions of the welded joint structure. By examining the parameters of fracture mechanics, for welded joints achieved by different welding parameters, the fracture ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| وصف الملف: | application/pdf |
| اللغة: | Serbian |
| العلاقة: | http://eteze.ni.ac.rs/application/showtheses?thesesId=7866Test; https://fedorani.ni.ac.rs/fedora/get/o:1677/bdef:Content/downloadTest; http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70052&RID=22989833Test; https://nardus.mpn.gov.rs/handle/123456789/18142Test; https://nardus.mpn.gov.rs/bitstream/id/70344/Milcic_Miodrag_D.pdfTest; https://nardus.mpn.gov.rs/bitstream/id/70343/Disertacija.pdfTest; https://hdl.handle.net/21.15107/rcub_nardus_18142Test |
| الإتاحة: | https://nardus.mpn.gov.rs/handle/123456789/18142Test http://eteze.ni.ac.rs/application/showtheses?thesesId=7866Test https://fedorani.ni.ac.rs/fedora/get/o:1677/bdef:Content/downloadTest http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70052&RID=22989833Test https://nardus.mpn.gov.rs/bitstream/id/70344/Milcic_Miodrag_D.pdfTest https://nardus.mpn.gov.rs/bitstream/id/70343/Disertacija.pdfTest https://hdl.handle.net/21.15107/rcub_nardus_18142Test |
| حقوق: | openAccess ; https://creativecommons.org/licenses/by-nc-nd/4.0Test/ ; BY-NC-ND |
| رقم الانضمام: | edsbas.6193A96D |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |