Abstract:
In order to provide austenitic single crystal stainless steel having preferable stress corrosion cracking resistance, strength, and irradiation induced embrittlement resistance so as to extend life of nuclear reactor core structure which is used under a high radiation dose environment, a method is disclosed, which comprises the steps of homogeneously dispersing carbides into a parent phase of the austenitic single crystal stainless steel by a two step solution heat treatment, and subsequent an ageing heat treatment after rapid cooling for precipitating fine carbides.
Abstract:
A process for the production of an electrical steel sheet having the ideal (100) [001] cube texture of iron or iron alloy, comprising cold rolling a sheet of a single crystal or large grained crystals of iron or iron alloy, in which said single crystal is or a majority of said large grained crystals are oriented so that the pole of the {114} plane may form an angle not greater than 15° with the normal direction of the plane of the sheet, and the direction may form an angle not greater than 15° with a single direction in the plane of the sheet, in said single direction at a rolling reduction of at least 40%, and annealing the rolled sheet to form a primary recrystallization texture of fine grains of an average grain size of not larger than 5 mm under conditions preventing the occurrence of secondary recrystallization.
Abstract:
PURPOSE: A rhenium-free single crystal super-alloy for the blade and the vane of a turbine is provided to allow the super-alloy to include aluminum, cobalt, chrome, hafnium, molybdenum, tantalum, titanium, and tungsten with certain contents and remnant including nickel and a small amount of an incidental element. CONSTITUTION: A rhenium-free single crystal super-alloy for the blade and the vane of a turbine includes 5.60 to 5.85 wt% of aluminum, 9.4 to 9.9 wt% of cobalt, 5.0 to 6.0 wt% of chrome, 0.08 to 0.35 wt% of hafnium, 0.50 to 0.70 wt% of molybdenum, 8.0 to 9.0 wt% of tantalum, 0.60 to 0.90 wt% of titanium, 8.5 to 9.8 wt% of tungsten, and remnant including nickel and a small amount of an incidental element. The total amount of the incidental element is about 1 wt% or less.
Abstract:
A system and a method for manufacturing a superconductor wire which can improve structure degree of texture with biaxial-alignment property, and a system and a method for manufacturing a superconductor wire having excellent crystal arrangement characteristics at low cost are provided. A method for manufacturing a metal wire comprises: a step of manufacturing a billet; a step of manufacturing a metal tape from the billet using a rolling process; and a step(S4) of recrystallizing the metal tape in a reductive atmosphere, wherein the metal tape recrystallizing step comprises a step of applying a predetermined magnetic field to the metal tape. The metal tape recrystallizing step comprises the step of performing one cycle of heat treatment process multiple times, wherein the one cycle of heat treatment process comprises: a step(S41) of applying a predetermined magnetic field to the metal tape at the Curie temperature or less; a step(S42) of applying a predetermined magnetic field to the metal tape while heating the metal tape to the Curie temperature or more; and a step(S43) of applying a predetermined magnetic field to the metal tape while rapidly cooling the metal tape to the Curie temperature or less.
Abstract:
본 발명의 2축 배향 조직을 가진 제품은, 면심 입방정 구조, 체심 입방정 구조 또는 조밀 육방정 구조를 가지는 금속으로 이루어지고 압연 및 소둔되고 2축 배향 조직을 가진 기판과, 그 기판 상에 에피택셜 퇴적된 에피택셜 초전도체 또는 다른 소자를 포함한다.
Abstract:
A method for preparing an iridium tip with atomic sharpness. The method includes tapering an iridium wire to a needle shape and heating the iridium needle in an oxygen atmosphere. Also disclosed is an iridium needle having a pyramidal structure which terminates with a small number of atoms prepared by the methods.
Abstract:
A biaxially textured alloy article includes a rolled and annealed biaxially textured base metal substrate characterized by an x-ray diffraction phi scan peak of no more than 20 DEG FWHM; and a biaxially textured layer of an alloy or another material on a surface thereof. The article further includes at least one of an electromagnetic device or an electro-optical device epitaxially joined to the alloy.