|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Friction Stir Welding and Processing IX
||Feasibility of Iridium Containing Nickel Base Superalloy Tool to Friction Stir Spot Welding of High Strength Steel
||Kunihiro Tanaka, Tatsuya Nakazawa, Koichi Sakairi, Yutaka Sato, Hiroyuki Kokawa, Toshihiro Omori, Kiyohito Ishida
|On-Site Speaker (Planned)
The authors developed a Ir-containing Ni base superalloy tool, strengthened by γ’ precipitation, for friction stir welding (FSW) of steels and titanium alloys. The Ir-containing Ni base superalloy tool exhibited the acceptable performance during FSW of 304 stainless steel and Ti-6Al-4V. In this study, feasibility of Ir-containing Ni base superalloy tool to friction stir spot welding (FSSW) of high strength steel was examined. FSSW was conducted on the lapped sheets of DP590 steel with thickness of 1.2 mm. The Ir-containing Ni base superalloy tool with 1.2mm long probe successfully produced the spot welds on DP590 steel without macroscopic deformation. Even after 600 FSSW trials, the tool shape was hardly changed, confirming that severe wear did not occur on the Ir-containing Ni base superalloy tool.
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