Macrostructure, microstructure and wear performance of Al alloy cladding fabricated by CMT technique

Abstract

The macrostructure, microstructure and wear performance of Al cladding fabricated by cold metal transfer (CMT) technique were investigated. The overlaps were formed on both sides of Al cladding using CMT technique with direct current mode. The weld depth and contact angle increased, and the overlap length reduced with an increase of heat input, which can be realized by increasing wire feed speed (WFS) or arc length correction (ALC). The grain size and thickness of heat affected zone increased with an increase of heat input, which resulted from increasing WFS or ALC. Due to the increase of average grain size, the hardness value of the clad Al alloy reduced with the increase of ALC. Besides, wear rate increases with an increase of ALC under the scope of load between 80 and 120 N and time between 10 and 20 min. The grooves are clearer at the wear surfaces with an increase of ALC at the wear surface.

Studies on Quality of Joints and Phenomena Therein for Welded Vehicle Components Made of Aluminium Alloy – a Review

“…Tian et al [183] reported that during CMT welding applied for aluminum alloy cladding fabrication, the enhancement of heat input caused the higher weld depth and contact angle, and lowered overlap length.…”

“…The FSWed joints of the 6 mm thick sheets made of dissimilar 5083-H111/6351-T6 alloys (Table 3), studied by Palanivel et al [ [144] were obtained when 6351-T6 alloy was placed on AS, while 5083-H111 alloy was placed on TS of joint. Similarly, during studies presented in [183,187] 6351 alloy was placed on AS, while 5083-H111 alloy was placed on the RS of joint. The grain size within the friction stir processed (FSPed) region was much smaller than in the parent material due to the higher temperature and extensive plastic deformation.…”

Studies on the Quality of Joints and Phenomena Therein for Welded Automotive Components Made of Aluminum Alloy—A Review

“…Tian et al [184] reported that, during CMT welding for aluminum alloy cladding fabrication, the enhancement of heat input caused a higher weld depth and contact angle and a reduced overlap length.…”

Experimental investigation and process parameter optimization in cold metal transfer welding for SS304L using response surface method

“…Researchers paid attention to the recognition of the best parametric combination in CMT welding of Al alloys [11]. Effects of Wire feed speed and Arc length correction on the micro, macrostrucutres and wear performance on Aluminium cladding using CMT were investigated [12]. Multi-parameter optimization techniques were used to identify the weld quality in terms of reinforcement of welded joint, width of the bead, penetration depth i.e., DOP, width of the heat affected zone i.e., HAZ [13].…”