Patent ID: 8820610
Filing Date: 2014-09-02
Classification: B22F,B23K,B32B,C21D,C22C,C22F,Y10T

Abstract:
1. A method for producing a functionally gradient material precursor comprising the steps of: forming a plurality of metal foam precursors by forming a plurality of assemblies each including metal members and blowing agents, and performing friction stir welding on each of the plurality of assemblies so that the blowing agents are caused to disperse within the metal members and the metal members are joined to each other, wherein material compositions of the respective metal members of the plurality of assemblies are different, and at least one of the plurality of assemblies compirses a laminate including a blowing agent and a pair of metal plates laminated to each other with the blowing agent sandwiched in between; and forming the functionally gradient material precursor by arranging the plurality of metal foam precursors formed in the step of forming the metal foam precursors so as to contact each other, and performing friction stir welding on the plurality of metal foam precursors arranged so as to contact each other in the step of forming the plurality of metal foam precursors, by arranging the plurality of assemblies so as to contact each other, and performing friction stir welding on all of the plurality of assemblies arranged so as to contact each other.