Multicomponent enabled MWCNTs-TiO2 nano-activating flux for controlling the geometrical behavior of modified TIG welding joint process
作者： Muhammad Muzamil , Jianjun Wu , Maaz Akhtar , Vivek Patel , Arfan Majeed
DOI: 10.1016/J.DIAMOND.2019.107442
关键词:
摘要: Abstract A comprehensive geometrical behavior against the multicomponent nano-activating flux, multi-walled carbon nanotubes-titanium oxide (MWCNTs-TiO2), was configured in this study. The specimens were investigated for macro-morphologies of weld seams, distortions, depths, and depth to thickness (D/T) ratios. scrutinized distortions has reported a decremented effect every step addition flux. traveling trends vertical individually started from 5.334, 6.146, 6.455 mm without flux eventually ended 3.896, 4.112, 4.713 mm respectively up 2 wt% MWCNTs-TiO2. similar beneficial on depths observed optical micrographs, which revealed radiating radii semi-circular profiles with increasing penetration. centripetal Marangoni convection (change surface tension) constriction tungsten inert gas (TIG) welding arc column found responsible mechanisms significant uplifting behavior. However, extended drive phenomenon due presence TiO2 created electrical resistance effect, provokes constricted droplet melting mode filler. use MWCNTs provided heterogeneous nucleation that freezes penetration along limiting distortion, attributed enormous mismatch coefficient thermal expansion (CTE) AA6061. experimental results also better performance at higher current (200A), triggered D/T >1 (at 1.5 wt% MWCNTs-TiO2) contrast 160A 180A.
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