Effect of welding parameters on microstructure and mechanical properties of AA7075/AA5182 alloys joined by TIG and MIG welding methods
Yükleniyor...
Tarih
2020
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
SpringerLink
Erişim Hakkı
info:eu-repo/semantics/restrictedAccess
Attribution-NonCommercial-ShareAlike 3.0 United States
Attribution-NonCommercial-ShareAlike 3.0 United States
Özet
In this study, V and X welding grooves were opened to the forehead positions of the AA5182 and AA7075 aluminum alloy
pairs and these alloy pairs were joined with tungsten inert gas (TIG) and metal inert gas (MIG) methods. Three diferent
welding currents were used in joints. Gas fow rates of 12 and 17 l/min at the TIG welding and wire feed rates of 38 and 45
cm/min at MIG welding were selected. The efect of the welding grooves, welding current, gas fow rate and wire feed rate
on microstructure and mechanical properties were investigated. Microstructures of welding zones were analyzed by an optical microscope and a scanning electron microscope (SEM). Vickers hardness of these zones was also measured. In addition,
tensile and fatigue tests were carried out. Fracture mechanisms of failed specimens were conducted after the tensile tests were
examined by using SEM. The highest hardness, tensile and fatigue strengths were obtained from the alloy pairs joined by
opening X welding groove with TIG welding method. These values were 89 HV, 262.87 MPa, and 131.5 MPa, respectively.
Similarly, the lowest tensile and fatigue strengths were obtained from the alloy pairs joined by opening V welding groove in
the TIG welding method. These values were, respectively, 94.48 MPa and 19.1 MPa. However, the minimum hardness value
was measured as 58 HV from the alloy pairs joined by opening V welding groove with MIG welding methods. In addition,
it was observed on the fracture surfaces that the grain distributions and mechanisms difered depending on the welding
methods, welding groove, and welding parameters.
Açıklama
Anahtar Kelimeler
Aluminum Alloys, Fatigue Strength, Microhardness, Microstructure, Tensile Strength
Kaynak
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
42
Sayı
Künye
Çelik, Y.H., Temiz, Ş., Çetkin, E. (2020). Effect of welding parameters on microstructure and mechanical properties of AA7075/AA5182 alloys joined by TIG and MIG welding methods. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 42, pp.1-12. DOI:https://doi.org/10.1007/s40430-019-2119-7
