Effect of Tool Shoulder Diameter on Stir Zone Characteristics of Friction Stir Welded HSLA Steel Joints

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• 作者：S. Ragu Nathan ; V. Balasubramanian…
• 关键词：Friction stir welding ; HSLA steel ; Tensile properties ; Impact toughness ; Microstructure
• 刊名：Transactions of the Indian Institute of Metals
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：69
• 期：10
• 页码：1861-1869
• 全文大小：2,886 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Metallic Materials
  Materials Science, general
  Tribology, Corrosion and Coatings
  
• 出版者：Springer India
• ISSN：0975-1645
• 卷排序：69

文摘

In this study, the effect of tool shoulder diameter (primary heat generating source) to the plate thickness ratio on tensile and impact toughness properties of friction stir welded high strength low alloy (HSLA) steel was investigated. A naval grade HSLA steel of 5 mm thick plates were welded with tool rotational speed of 600 rpm and welding speed of 30 mm/min using five tungsten based alloy tools having shoulder diameter varying from 20 to 30 mm. Microstructural characteristics of the weld joints were analyzed using optical microscopy along with the evaluation of tensile properties. From this investigation, it was found that the joint fabricated using a tool shoulder diameter of 25 mm (5 times the plate thickness) exhibited superior mechanical properties compared to other joints.