Provided is a soft magnetic alloy which has high saturation flux density, low coercivity, and a high specific resistance, and is represented by the compositional formula (Fe.sub.(1(+))X1.sub.X2.sub.).sub.(1(a+b+c+d+e))M.sub.aSi.sub.bCu.sub.cX3.sub.dB.sub.e, wherein X1 is at least one element selected from the group consisting of Co and Ni, X2 is at least one element selected from the group consisting of Ti, V, Mn, Ag, Zn, Al, Sn, As, Sb, Bi, and rare earth elements, X3 is at least one element selected from the group consisting of C and Ge, and M is at least one element selected from the group consisting of Zr, Nb, Hf, Ta, Mo, and W, and wherein 0.030a0.120, 0.020b0.175, 0c0.020, 0d0.100, 0e0.030, 0, 0, and 0+0.55).

Provided is a soft magnetic alloy which has high saturation flux density, low coercivity, and a high specific resistance, and is represented by the compositional formula (Fe.sub.(1(+))X1.sub.X2.sub.).sub.(1(a+b+c+d+e))M.sub.aSi.sub.bCu.sub.cX3.sub.dB.sub.e, wherein X1 is at least one element selected from the group consisting of Co and Ni, X2 is at least one element selected from the group consisting of Ti, V, Mn, Ag, Zn, Al, Sn, As, Sb, Bi, and rare earth elements, X3 is at least one element selected from the group consisting of C and Ge, and M is at least one element selected from the group consisting of Zr, Nb, Hf, Ta, Mo, and W, and wherein 0.030a0.120, 0.020b0.175, 0c0.020, 0d0.100, 0e0.030, 0, 0, and 0+0.55).

Provided is a flaky soft magnetic powder composed of an FeSiAl alloy containing Si: 5.5 to 10.5 mass %, Al: 4.5 to 8.0 mass %, and Fe and incidental impurities: balance, wherein the flaky powder exhibits a ratio (D.sub.50/TD) of 35 to 92 where D.sub.50 represents the average particle size (m) of the powder and TD represents the tap density (Mg/m.sup.3) of the powder, and the flaky powder exhibits a coercive force of 239 to 479 A/m as measured under application of a magnetic field in an in-plane direction of the flaky powder. The flaky soft magnetic powder exhibits superior sheet formability and has high magnetic permeability.

Provided is a flaky soft magnetic powder composed of an FeSiAl alloy containing Si: 5.5 to 10.5 mass %, Al: 4.5 to 8.0 mass %, and Fe and incidental impurities: balance, wherein the flaky powder exhibits a ratio (D.sub.50/TD) of 35 to 92 where D.sub.50 represents the average particle size (m) of the powder and TD represents the tap density (Mg/m.sup.3) of the powder, and the flaky powder exhibits a coercive force of 239 to 479 A/m as measured under application of a magnetic field in an in-plane direction of the flaky powder. The flaky soft magnetic powder exhibits superior sheet formability and has high magnetic permeability.

An objective of the invention to provide an alloy article that exhibits even better mechanical properties and/or even higher corrosion resistance than conventional high entropy articles without sacrificing the attractive properties thereof, a product formed of the alloy article, and a fluid machine having the product. An alloy article according to the invention has a predetermined chemical composition comprising: Co, Cr, Fe, Ni and Ti, each within a range of 5 atomic % or more and 35 atomic % or less; Mo within a range of more than 0 atomic % and less than 8 atomic %; an element with a larger atomic radius than the atomic radiuses of Co, Cr, Fe and Ni within a range of more than 0 atomic % and 4 atomic % or less; and a balance of inevitable impurities.

Provided is a heat-resistant titanium (Ti) alloy member having excellent mechanical characteristics and oxidation resistance at high temperatures and having less mechanical anisotropy, a method for producing such a titanium alloy member, and a product including such an alloy member. A titanium-based alloy member includes titanium (Ti) as a major element and at least 0.5 to 2.0 mass % of boron (B) and has a dispersion of fiber-like TiB particles precipitated in a polycrystal matrix phase, the TiB particles each having a long axis of 1 to 10 m and a short axis of 0.01 to 0.5 m or less and having an aspect ratio of 2 to 1000, the TiB particles precipitating in a crystallographically random direction in each of crystal grains of the matrix phase.

Provided is a heat-resistant titanium (Ti) alloy member having excellent mechanical characteristics and oxidation resistance at high temperatures and having less mechanical anisotropy, a method for producing such a titanium alloy member, and a product including such an alloy member. A titanium-based alloy member includes titanium (Ti) as a major element and at least 0.5 to 2.0 mass % of boron (B) and has a dispersion of fiber-like TiB particles precipitated in a polycrystal matrix phase, the TiB particles each having a long axis of 1 to 10 m and a short axis of 0.01 to 0.5 m or less and having an aspect ratio of 2 to 1000, the TiB particles precipitating in a crystallographically random direction in each of crystal grains of the matrix phase.

A soft magnetic powder of the invention has a composition represented by Fe.sub.100-a-b-c-d-e-fCu.sub.aSi.sub.bB.sub.cM.sub.dM.sub.eX.sub.f (at %) [wherein M is Nb, W, Ta, Zr, Hf, Ti, or Mo, M is V, Cr, Mn, Al, a platinum group element, Sc, Y, Au, Zn, Sn, or Re, X is C, P, Ge, Ga, Sb, In, Be, or As, and a, b, c, d, e, and f are numbers that satisfy the following formulae: 0.1a3, 0<b30, 0<c25, 5b+c30, 0.1d30, 0e10, and 0f10], wherein a crystalline structure having a particle diameter of 1 nm or more and 30 nm or less is contained in an amount of 40 vol % or more, and the difference in the coercive force of the powder after classification satisfies predetermined conditions.

A soft magnetic powder of the invention has a composition represented by Fe.sub.100-a-b-c-d-e-fCu.sub.aSi.sub.bB.sub.cM.sub.dM.sub.eX.sub.f (at %) [wherein M is Nb, W, Ta, Zr, Hf, Ti, or Mo, M is V, Cr, Mn, Al, a platinum group element, Sc, Y, Au, Zn, Sn, or Re, X is C, P, Ge, Ga, Sb, In, Be, or As, and a, b, c, d, e, and f are numbers that satisfy the following formulae: 0.1a3, 0<b30, 0<c25, 5b+c30, 0.1d30, 0e10, and 0f10], wherein a crystalline structure having a particle diameter of 1 nm or more and 30 nm or less is contained in an amount of 40 vol % or more, and the difference in the coercive force of the powder after classification satisfies predetermined conditions.

A soft magnetic powder of the invention has a composition represented by Fe.sub.100-a-b-c-d-e-fCu.sub.aSi.sub.bB.sub.cM.sub.dM.sub.eX.sub.f (at %) [wherein M is Nb, W, Ta, Zr, Hf, Ti, or Mo, M is V, Cr, Mn, Al, a platinum group element, Sc, Y, Au, Zn, Sn, or Re, X is C, P, Ge, Ga, Sb, In, Be, or As, and a, b, c, d, e, and f are numbers that satisfy the following formulae: 0.1a3, 0<b30, 0<c25, 5b+c30, 0.1d30, 0e10, and 0f10], wherein a crystalline structure having a particle diameter of 1 nm or more and 30 nm or less is contained in an amount of 40 vol % or more, and the difference in the coercive force of the powder after classification satisfies predetermined conditions.