Influence of Cold Metal Transfer Process and Its Heat Input on Weld Bead Geometry and Porosity of Aluminum-Copper Alloy Welds. Issue 3 (March 2016)

• Record Type: Journal Article
• Authors: Cong, Baoqiang; Ouyang, Ruijie; Qi, Bojin; Ding, Jialuo
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 45:Issue 3(2016)
• Page Start: 606
• Page End: 611
• Publication Date: 2016-03
• Subjects: aluminum alloy -- cold metal transfer -- heat input -- weld bead geometry -- porosity; Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(16)30080-7
• Languages: English
• ISSNs: 1875-5372

Abstract

Abstract: The weld bead geometry and the porosity of AA2219-T851 high strength aluminum alloy welds with ER2319 wire produced by different cold metal transfer (CMT) processes and heat inputs were investigated. The results show that a narrow finger-shaped geometry is observed using the conventional CMT process and a large number of gas pores exist in the lower and upper parts of welds. Compared to results of above mentioned CMT process, the weld melting area is increased using CMT-pulse (CMT-P) process, and it is beneficial to reduce the porosity effectively with an appropriate heat input. The finger-shaped geometry with lower melting depth using CMT-advanced (CMT-ADV) process and the spherical-shaped bead geometry with lower dilution using CMT-pulse advanced (CMT-PADV) process are achieved. The gas pore is reduced predominantly and even eliminated due to the lower heat input and the effective oxide cleanliness of wire ends for the two processes.