Mechanical Properties of Dissimilar and Similar Cold Metal Transfer Welded Galvanized Steel 1314 and Aluminum AA1050*

2014 ◽  
Vol 56 (10) ◽  
pp. 874-878
Author(s):  
Alaattin Ozan İrizalp ◽  
Hülya Durmus ◽  
Nilay Yüksel ◽  
İlyas Türkmen ◽  
Onur Uzun
Keyword(s):  
Mechanical Properties ◽  
Metal Transfer ◽  
Galvanized Steel ◽  
Cold Metal Transfer ◽  
Cold Metal

scholarly journals Influence of Preheating Temperature on Cold Metal Transfer (CMT) Welding–Brazing of Aluminium Alloy/Galvanized Steel

2018 ◽  
Vol 8 (9) ◽  
pp. 1659 ◽  
Author(s):  
Youqiong Qin ◽  
Xi He ◽  
Wenxiang Jiang
Keyword(s):  
Aluminium Alloy ◽  
Interfacial Layer ◽  
Metal Transfer ◽  
Galvanized Steel ◽  
Load Force ◽  
Cold Metal Transfer ◽  
Preheating Temperature ◽  
Cmt Welding ◽  
Brazed Joint ◽  
Cold Metal

Bead-on-plate cold metal transfer (CMT) brazing and overlap CMT welding–brazing of 7075 aluminium alloy and galvanized steel at different preheating temperatures were studied. The results indicated that AlSi5 filler wire had good wettability to galvanized steel. The preheating treatment can promote the spreadability of liquid AlSi5. For the overlap CMT welding–brazed joint, the microstructure of the joint was divided into four zones, namely, the interfacial layer, weld metal zone, zinc-rich zone, and heat affected zone (HAZ). The load force of the joints without preheating and 100 °C preheating temperature was 8580 N and 9730 N, respectively. Both of the joints were fractured in the fusion line with a ductile fracture. Further increasing the preheating temperature to 200 °C would decrease the load force of the joint, which fractured in the interfacial layer with a brittle fracture.

Microstructure and mechanical properties of cold metal transfer welded galvanized steel/magnesium alloy dissimilar joints

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040060
Author(s):  
Chao Zhang ◽  
Mingfang Wu ◽  
Yuxin Wang ◽  
Juan Pu
Keyword(s):  
Magnesium Alloy ◽  
Heat Input ◽  
Interface Layer ◽  
Metal Transfer ◽  
Galvanized Steel ◽  
Cold Metal Transfer ◽  
Welding Joint ◽  
Welding Heat Input ◽  
Weld Appearance ◽  
Cold Metal

The joining of magnesium alloy to galvanized steel was realized by cold metal transfer method with AZ31 magnesium alloy welding wire. Weld appearance, microstructure and tensile properties of Mg–steel joints under various welding parameters were investigated with different welding heat inputs. The results showed that magnesium alloy-steel brazed joints had good weld appearance. When the welding heat input was 141 J/mm, Zn elements were enriched in the Zn-rich zone (ZRZ), and the interface layer was composed of a large portion of Mg–Zn phases and minor Mg–Al phases. With the increase of welding heat input, Zn elements in the ZRZ gradually decreased, Fe/Al phase appeared in the interface layer, and the strength of welding joint increased. When the welding heat input was 159 J/mm, the tensile strength of welding joint reached the maximum value of 198 MPa. However, when the welding input was increased to 181 J/mm, Zn element in the ZRZ was burnt and volatilized seriously, resulting in poor wetting and spreading properties of liquid phase at the interface zone of the steel.

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