Effect of welding speed on microstructure and mechanical properties of titanium alloy/stainless steel lap joints during cold metal transfer method

作者: Gang Li , Shengyu Xu , Xiaofeng Lu , Xiaolei Zhu , Yupeng Guo

DOI: 10.1051/METAL/2020052

关键词:

摘要: Cold metal transfer (CMT) technique is developed for lap joining of titanium (Ti) alloy to stainless steel (SS) with CuSi3 filler wire. The effect welding speed on the microstructure and mechanical properties Ti/SS joints investigated. results indicate that wetting angle gradually increases weld width decreases increasing speed. It found many coarse phases in fusion zone are rich Ti, Fe Si etc, inferring as Fe–Si–Ti ternary phase and/or Fe2 Ti at low Many fine spherical particles considered iron-rich high transition layer exhibited Ti–Cu interface. With heat input, intermetallic becomes thicker. A variety brittle compounds (IMCs) identified joints. shear strength Two fracture modes occur Thicker reaction causes poor joint strength. Fe–Ti–Si within detrimental surface dominated by smooth tear pattern mode merely along

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