TC4 titanium tungsten inert gas arc (TIG) weld beads were treated by laser shock processing (LSP) technology.After a single and multiple times LSP introduced,surface hardness,tensile mechanical properties and fatigue ...TC4 titanium tungsten inert gas arc (TIG) weld beads were treated by laser shock processing (LSP) technology.After a single and multiple times LSP introduced,surface hardness,tensile mechanical properties and fatigue life of those weld joints were measured.The results showed that:compared with TC4 titanium alloy TIG joints without LSP treatment,those weld beads surface hardness on weld zone and heat affected zone are nearly uniform.The fatigue life of those TC4 TIG weld joints treated by a single time LSP process is enhanced.With the LSP times increased,TC4 titanium alloy weld beads tensile strength and yield strength are not obviously changed.The special elongation of these welding joints treated by different times LSP treatment will be influenced observably.Special elongation of those joints is decreased with the LSP treatment times increased from one to three.The welding joint special elongation was reduced to the least degree since three times LSP treatment had been introduced.展开更多
文摘TC4 titanium tungsten inert gas arc (TIG) weld beads were treated by laser shock processing (LSP) technology.After a single and multiple times LSP introduced,surface hardness,tensile mechanical properties and fatigue life of those weld joints were measured.The results showed that:compared with TC4 titanium alloy TIG joints without LSP treatment,those weld beads surface hardness on weld zone and heat affected zone are nearly uniform.The fatigue life of those TC4 TIG weld joints treated by a single time LSP process is enhanced.With the LSP times increased,TC4 titanium alloy weld beads tensile strength and yield strength are not obviously changed.The special elongation of these welding joints treated by different times LSP treatment will be influenced observably.Special elongation of those joints is decreased with the LSP treatment times increased from one to three.The welding joint special elongation was reduced to the least degree since three times LSP treatment had been introduced.
