Patent ID: 9308686
Filing Date: 2016-04-12
CPC Classification: B21J,B23K,B29C,F16B

Claim Text:
1. A method for joining of two or more weldable or non-weldable materials by using a friction stir spot welding, the method comprising steps of: creating a cavity at a centre of overlapped welding surface of a first material and a second material by removing a portion of predefined geometry therefrom at least one of the first and the second materials to form a joint region; adding either reinforcement or an alloying element or combination of both into said created cavity in the joint region; penetrating a tapered cylindrical filler material with a similar geometry design as that of said cavity in the joint region by rotating said tapered cylindrical filler material in combination with compressive force thereto; interlocking the tapered cylindrical filler material with at least one of the first and second materials that is weldable with the filler material to form an inter-material bond; welding the first material with the second material by filling the cavity formed in the joint region with the tapered cylindrical filler material; and generating a composition structure at the weld interface with customized interface material properties.