| 摘要 |
PROBLEM TO BE SOLVED: To provide a high entropy alloy structure high in uniformity of distribution of elemental composition and mechanical strength, and having good high temperature strength and corrosion resistance and any large shape and dimension.SOLUTION: There is provided a high entropy alloy structure containing Al, Co, Cr, Fe and Ni in a range of atom concentration of 5 to 30 at% respectively, having difference of atom concentrations of at least 4 kind elements of the elements in a range of less than 3 at% and containing a columnar crystal in which the 5 kinds of elements are solid-dissolved as a main crystal. The main crystal has a crystal structure of a face-centered cubic lattice or a body-centered cubic lattice, and the high entropy alloy structure is molded by repeating of forming a layer-like solidification structure, which is formed by repeating of forming a solidification structure by flatting an alloy powder in a layer-like shape, melting the flatted alloy powder by local heating and then solidifying to form the solidification structure, and moving an area to be heated by the local heating parallel to a face in which the alloy powder is flatted to form the layer-like solidification structure.SELECTED DRAWING: Figure 2 |
