Suppression of root flaw in friction stir welded 6061-T6 aluminum alloy using double spiral tool

• TOMONAGA Naoya

  富山大学大学院（現　ポリテクセンター富山）

• TAKANO Aris

  富山大学工学部（現　CK金属株式会社）

• KAWANISHI Syouichi

  富山大学大学院（現　株式会社富山村田製作所）

• YAMANE Takeshi

  富山大学都市デザイン学部

• SHIBAYANAGI Toshiya

  富山大学都市デザイン学部

抄録

Friction Stir Welding (FSW) has been attracting attention for its usefulness such as relatively easy joining compared to conventional arc welding, and its application to industries is being expanded, for example thick aluminum plates for infra-structures. FSW is known to yield defects called root flaws depending on welding conditions. In order to suppress the defects, it is necessary to optimally control the plastic flow and to stir the materials to be welded cooperatively. The present study tried to make a sound joint of 6061-T6 aluminum alloy sheets with 3mm in thickness using a newly designed tool called “Double Spiral Tool” which can increase the volume of the stir zone around the tool. Two types of tools were used: a normal type with M4 to M3 screws (called single spiral tool) and a “double spiral” type with the same pitch and twice amount of lead length. The welding tests revealed that the root flaw was completely disappeared with the double spiral tool under the welding condition of 900rpm-50mm/min, while it still remained in the joint produced by the single spiral tool. Thus, the present study successfully proved that the double spiral tool is effective to suppress the root flaw in FSW joints of 6061 aluminum alloy.

収録刊行物

• 溶接学会論文集

  溶接学会論文集 38 (4), 351-354, 2020

  一般社団法人 溶接学会

キーワード

• aluminum alloy
• Friction Stir Welding (FSW)
• double-spiral tool
• root flaw
• 6061-T6 aluminum alloy
• tool shape

詳細情報

• CRID: 1390286426515126144
• NII論文ID: 130007937718
• DOI: 10.2207/qjjws.38.351
• ISSN: 24348252
• ISSN: 02884771
• Web Site: https://www.jstage.jst.go.jp/article/qjjws/38/4/38_351/_pdf
• 本文言語コード: en
• データソース種別:
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