Alloy structure and method for producing alloy structure

An alloy structure comprising:

• a column crystal that has an average grain size of 100 μm or less in which Fe and at least four elements other than Fe are solid-dissolved, wherein each of Fe and the at least four elements is contained in an atomic concentration range of 5 at % or more and 30 at % or less;
• a main crystal of the column crystal that has a crystalline structure of a face-centered cubic lattice or a body-centered cubic lattice;
• and
• an impurity,
• wherein the impurity includes:
• P in an amount between 0.002 wt % and 0.005 wt %,
• Si in an amount between 0.010 wt % and 0.040 wt %,
• S in an amount between 0.001 wt % and 0.002 wt %,
• Sn in an amount between 0.002 wt % and 0.005 wt %,
• Sb in an amount between 0.001 wt % and 0.002 wt %,
• As in an amount between 0.001 wt % and 0.005 wt %,
• Mn in an amount between 0.020 wt % and 0.050 wt %,
• O in an amount between 0.0003 wt % and 0.001 wt %, and
• N in an amount between 0.001 wt % and 0.002 wt %,
• wherein Fe and the at least four elements are uniformly distributed in the alloy structure and the alloy structure is obtained by laminating layer-shaped solidification structures and a growth direction of the column crystal is oriented in a laminating direction of the solidification structures, and
• wherein the at least four elements other than Fe are selected from the group consisting of Al, Ti, V, Cr, Co, Ni, Cu, Zn, Ga, Ge, Se, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Te, Ta, W, Re, Os, Ir, Pt, and Au.