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Cold Metal Transfer Welding–Brazing of Pure Titanium TA2 to Aluminum Alloy 6061‐T6
Author(s) -
Li Junzhao,
Sun Qingjie,
Liu Yibo,
Cai Chunwei,
Feng Jicai
Publication year - 2017
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201600494
Subject(s) - materials science , brazing , eutectic system , joint (building) , welding , alloy , filler metal , titanium , ultimate tensile strength , metallurgy , fusion welding , aluminium , composite material , base metal , gas tungsten arc welding , arc welding , structural engineering , engineering
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 α‐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 μm and the optimum tensile strength can reach up to 305.5 N mm −1 , while Ti–Al joint forms three joining interfaces with tensile strength of 168.2 N mm −1 . Moreover, Al–Ti joint fractures at the weld metal with plastic fracture mode, while Ti–Al joint fractures at joining interface.