Cold Metal Transfer Welding–Brazing of Pure Titanium TA2 to Aluminum Alloy 6061‐T6

Abstract

Pure titanium TA2 and aluminum alloy 6061-T6 are joined using AlSi5 filler wire by cold metal transfer (CMT) process in the form of two lap configurations. Results indicate that these two various lap joints are both composed of fusion welded joint and brazing joint. The fusion welded joint consists of a-Al solid solution and Al-Si eutectic. Brazing joint is formed between local molten Ti base metal and weld metal, which produces a certain thickness of reaction layer. Al-Ti joint only has one joining interface with a thickness of 1-5 mm and the optimum tensile strength can reach up to 305.5 N mm À1 , while Ti-Al joint forms three joining interfaces with tensile strength of 168.2 N mm À1 . Moreover, Al-Ti joint fractures at the weld metal with plastic fracture mode, while Ti-Al joint fractures at joining interface.

Effect of deposition layer on microstructure of Ti–Al bimetallic structures fabricated by wire and arc additive manufacturing

“…A Ti–Al bimetallic component possesses the advantages of both Ti and Al alloys, such as light weight and low cost [19], thereby presenting extensive application prospects. The Ti–Al bimetallic structures are used in the aerospace, aviation, automobile, and transport industries owing to their prominent corrosion-resistant and light-weight properties [20, 21].…”

Interfacial microstructure and fractography of Ti6Al4V/5A05Al dissimilar joint using the cold arc MIG welding

“…The cold metal transfer (CMT) welding technology was utilized in lap welding-brazing of Ti/Al dissimilar joint. Comparative analysis of the Ti/Al interface and tensile strength with different configuration forms was done in [11]. An external axial magnetic field hybrid T a b l e 1.…”

Interfacial microstructure and fractography of Ti6Al4V/5A05Al dissimilar joint using the cold arc MIG welding

“…The cold metal transfer (CMT) welding technology was utilized in lap welding-brazing of Ti/Al dissimilar joint. Comparative analysis of the Ti/Al interface and tensile strength with different configuration forms was done in [11]. An external axial magnetic field hybrid CMT welding process was used in further research; the interfacial microstructures and joint properties under the influence of the magnetic field were discussed [12].…”

“…A few attempts were carried *Corresponding author: tel. : +86 351 3557519; e-mail address: wszweishouzheng@126.com out using MIG welding, and some progress was made [8][9][10][11][12][13][14].…”