A magneto-sensitive wire (magneto-sensitive body) made of a Co-based alloy having a composite structure in which crystal grains are dispersed in an amorphous phase. The Co-based alloy is, for example, a Co—Fe—Si—B-based alloy, and the total amount of Si and B is preferably 20 to 25 at % with respect to the Co-based alloy as a whole. Preferably, the average diameter of the crystal grains is 70 nm or less and the area ratio of the crystal grains is 10% or less to the composite structure as a whole. The magneto-sensitive wire has a circular cross section and the wire diameter is about 1 to 100 μm. Such a magneto-sensitive wire can be obtained, for example, through a heat treatment step of heating an amorphous wire composed of a Co-based alloy at a temperature equal to or higher than a crystallization start temperature and lower than a crystallization end temperature.

A magneto-sensitive wire (magneto-sensitive body) made of a Co-based alloy having a composite structure in which crystal grains are dispersed in an amorphous phase. The Co-based alloy is, for example, a Co—Fe—Si—B-based alloy, and the total amount of Si and B is preferably 20 to 25 at % with respect to the Co-based alloy as a whole. Preferably, the average diameter of the crystal grains is 70 nm or less and the area ratio of the crystal grains is 10% or less to the composite structure as a whole. The magneto-sensitive wire has a circular cross section and the wire diameter is about 1 to 100 μm. Such a magneto-sensitive wire can be obtained, for example, through a heat treatment step of heating an amorphous wire composed of a Co-based alloy at a temperature equal to or higher than a crystallization start temperature and lower than a crystallization end temperature.

This application relates to a nickel-based superalloy suitable for additive manufacturing and a method for manufacturing a high-temperature member using the same. The nickel-based superalloy includes 13.7% to 14.3% by weight of Cr, 9.0% to 10.0% by weight of Co, 3.7% to 4.3% by weight of Mo, 2.6% to 3.4% by weight of Ti, 3.7% to 4.3% by weight of W, 2.6% to 3.4% by weight of Al, 0.15% to 0.19% by weight of C, greater than 0% by weight and not less than 0.005% by weight of B, 0.01% to 0.05% by weight of Zr, 2.0% to 2.7% by weight of Ta, 0.6% to 1.1% by weight of Hf, Ni residue, and unavoidable impurities. The nickel-based superalloy has a high fraction of strengthening phase, thereby maintaining excellent high-temperature strength. Additive manufacturing with the nick-based superalloy is much easier than existing nickel-based superalloys, thereby cost-effectively providing maximized cooling efficiency.

This application relates to a nickel-based superalloy suitable for additive manufacturing and a method for manufacturing a high-temperature member using the same. The nickel-based superalloy includes 13.7% to 14.3% by weight of Cr, 9.0% to 10.0% by weight of Co, 3.7% to 4.3% by weight of Mo, 2.6% to 3.4% by weight of Ti, 3.7% to 4.3% by weight of W, 2.6% to 3.4% by weight of Al, 0.15% to 0.19% by weight of C, greater than 0% by weight and not less than 0.005% by weight of B, 0.01% to 0.05% by weight of Zr, 2.0% to 2.7% by weight of Ta, 0.6% to 1.1% by weight of Hf, Ni residue, and unavoidable impurities. The nickel-based superalloy has a high fraction of strengthening phase, thereby maintaining excellent high-temperature strength. Additive manufacturing with the nick-based superalloy is much easier than existing nickel-based superalloys, thereby cost-effectively providing maximized cooling efficiency.

A Nickel-based superalloy, whose composition includes, in percent by weight of the total composition: Chromium: 10.0-11.25; Cobalt: 11.2-13.7; Molybdenum: 3.1-3.8; Tungsten: 3.1-3.8; Aluminium: 2.9-3.5; Titanium: 4.6-5.6; Niobium: 1.9-2.3; Hafnium: 0.25-0.35; Zirconium: 0.040-0.060; Carbon: 0.010-0.030; Boron: 0.01-0.030; Nickel: remainder as well as unavoidable impurities; the composition being free of tantalum.

A Nickel-based superalloy, whose composition includes, in percent by weight of the total composition: Chromium: 10.0-11.25; Cobalt: 11.2-13.7; Molybdenum: 3.1-3.8; Tungsten: 3.1-3.8; Aluminium: 2.9-3.5; Titanium: 4.6-5.6; Niobium: 1.9-2.3; Hafnium: 0.25-0.35; Zirconium: 0.040-0.060; Carbon: 0.010-0.030; Boron: 0.01-0.030; Nickel: remainder as well as unavoidable impurities; the composition being free of tantalum.

There is provided a method of treating a nickel base super alloy (NiSa) article. First, the NiSa article having fine grains is obtained. The NiSa article has a uniform distribution of the fine grains and substantially uniform mechanical properties throughout. One or more regions within the NiSa article are mechanically deformed. Then, the NiSa article is heat treated to obtain coarse grains in the one or more regions, the coarse grains having a size that is larger than that of the fine grains of the NiSa article outside of the one or more regions.

There is provided a method of treating a nickel base super alloy (NiSa) article. First, the NiSa article having fine grains is obtained. The NiSa article has a uniform distribution of the fine grains and substantially uniform mechanical properties throughout. One or more regions within the NiSa article are mechanically deformed. Then, the NiSa article is heat treated to obtain coarse grains in the one or more regions, the coarse grains having a size that is larger than that of the fine grains of the NiSa article outside of the one or more regions.

A nickel-cobalt material and component includes a thermally stabilized nickel-cobalt alloy. The nickel-cobalt alloy disclosed herein includes nanocrystalline grain structures, pinning, such as Zener pinning, and intragranular twinning. The nickel-cobalt alloy disclosed herein exhibits multiple properties including an improved fracture toughness, an increased thermal stability, and an improved ultimate tensile strength.

A nickel-cobalt material and component includes a thermally stabilized nickel-cobalt alloy. The nickel-cobalt alloy disclosed herein includes nanocrystalline grain structures, pinning, such as Zener pinning, and intragranular twinning. The nickel-cobalt alloy disclosed herein exhibits multiple properties including an improved fracture toughness, an increased thermal stability, and an improved ultimate tensile strength.