396 results about "Area fraction" patented technology

The present invention relates to an Al-based alloy sputtering target, comprising Ni in an amount of 0.05 to 10 atomic percent, wherein the Al-based alloy sputtering target satisfies: (1) that a ratio of a P value to a total area of a sputtering surface is 70% or more, wherein the P value indicates a total of area fractions of <001>±15°, <011>±15°, <111>±15° and <311>±15°; (2) that a ratio of the area fraction of <011>±15° to the P value is 30% or more; and (3) that a ratio of the area fraction of <111>±15° to the P value is 10% or less, when crystallographic orientations <001>, <011>, <111> and <311> in a normal line direction to a sputtering surface of the Al-based alloy sputtering target are observed in accordance with the electron backscatter diffraction pattern method.

An aluminum alloy brazing sheet includes a core material containing Si, Cu and Mn by a predetermined amount, the balance being Al and inevitable impurities, a sacrificial anode material disposed on one face side of the core material and containing Si, Zn and Mg by a predetermined amount, the balance being Al and inevitable impurities, and a brazing filler material disposed on the other face side of the core material and formed of an aluminum alloy, and the area fraction of Zn—Mg-based intermetallic compounds with 2.0 μm or above particle size on the surface of the sacrificial anode material may be 1.0% or below. Or otherwise, in the aluminum alloy brazing sheet, the number density of Al—Cu-based intermetallic compounds with 0.5 μm or above particle size inside the core material may be 1.0 piece / μm2 or below.

A steel sheet including C at 0.05 to 0.15%, Si at 0.2 to 1.2%, Mn at 1.0 to 2.0%, P at not more than 0.04%, S at not more than 0.0030%, Al at 0.005 to 0.10%, N at not more than 0.005% and Ti at 0.03 to 0.13%, the balance being Fe and inevitable impurities, includes surface regions having an area fraction of bainite of less than 80% and an area fraction of a ferrite phase with a grain diameter of 2 to 15 μm of not less than 10%, the surface regions extending from both surfaces of the steel sheet each to a depth of 1.5 to 3.0% relative to a total sheet thickness, as well as an inner region other than the surface regions having an area fraction of a bainite phase of more than 95%, and has a tensile strength of not less than 780 MPa.

The invention relates to engineered matrices comprising collagen fibrils with specific characteristics, including, but not limited to, a specific fibril area fraction (i.e., density) and / or a specific elastic or linear modulus (i.e., stiffness). The invention also relates to methods of preparation and use of the matrices.

This cold-rolled steel sheet has a predetermined chemical composition, and has a metallographic structure containing, by area fraction, 40.0% to below 60.0% of polygonal ferrite, 30.0% or more of bainitic ferrite, 10.0-25.0% of retained austenite, and 15.0% or less of martensite. In the retained austenite, the proportion of retained austenite having an aspect ratio of 2.0 or less, a major axis length of 1.0 microns or less, and a minor axis length of 1.0 microns or less is 80.0% or more. In the bainitic ferrite, the proportion of bainitic ferrite which has an aspect ratio of 1.7 or less, and in which the average crystallographic misorientation is 0.5 degrees to below 3.0 degrees in a region surrounded by grain boundaries having a crystallographic misorientation of 15 degrees or more, is 80.0% or more. The connectivity D value between the martensite, the bainitic ferrite, and the retained austenite is 0.70 or less.

The purpose of the present invention is to provide: an abrasion-resistant steel plate which exhibits excellent impact-abrasion resistance characteristics and which is suitable for use in construction machinery, shipbuilding, steel tubing, civil engineering, architecture and so on; and a manufacturing process therefor. In view of the problem, this abrasion-resistant steel plate is characterized in that: the steel plate has a specific steel composition; the DI* defined by formula (1) is 100 to 250; the surface layers of the plate comprise at least 90% of martensite in area fraction and exhibit a Brinell hardness of 450HBW10 / 3000 or more; and the thicknesswise central zone of the plate comprises at least 70% of lower bainite in area fraction, the thicknesswise central zone being a zone which spreads from the position corresponding to one half of the plate thickness to the positions corresponding to depths of 0.5mm from both surfaces. DI*=33.85 × (0.1×C)0.5 × (0.7×Si+1) × (3.33×Mn+1) × (0.35×Cu+1) × (0.36×Ni+1) × (2.16×Cr+1) × (3×Mo+1) × (1.75×V+1) × (1.5×W+1) ··(1) [wherein the symbols of elements represent the contents (mass%) of the elements respectively]

A group 13 nitride crystal substrate according to the present invention is produced by growing a group 13 nitride crystal on a seed-crystal substrate by a flux method, wherein a content of inclusions in the group 13 nitride crystal grown in a region of the seed-crystal substrate except for a circumferential portion of the seed-crystal substrate, the region having an area fraction of 70% relative to an entire area of the seed-crystal substrate, is 10% or less, preferably 2% or less.

An Al-Mg-Si aluminum-base alloy sheet which is inhibited at high repeatability from forming ridging marks in press forming even when the forming conditions are more severe. The aluminum-base alloy sheet has a specific composition and has, in the sheet widthwise direction in a relatively wide area, a texture wherein the Goss and Cube orientation components are reduced in terms of average area fraction in the sheet widthwise direction and the variations of Goss and Cube orientation components in the texture are reduced in terms of difference between the maximum and minimum area fractions in the sheet widthwise direction. Thus, the aluminum alloy sheet is inhibited from forming uneven ridging marks having a relatively large period in the sheet widthwise direction on the surface of the sheet.

An HPF molding member having a melted aluminum plating layer formed on the surface of a base steel sheet and excellent delamination resistance. The base steel sheet comprises: 0.18-0.25% by weight of C; 0.1-1.0% by weight of Si; 0.9-1.5% by weight of Mn; 0.03% by weight or less of P; 0.01% by weight or less of S; 0.01-0.05% by weight of Al; 0.05-0.5% by weight of Cr; 0.01-0.05% by weight of Ti; 0.001-0.005% by weight of B; 0.009% by weight or less of N; and the balance Fe and other impurities. The plating layer consists of a soft diffusion layer and a hard alloy layer, the hard alloy layer having a tau layer irregularly and non-continuously dispersed and distributed on the inside thereof at 10% or more of the entire area fraction. The difference in hardness between the alloy layer and the diffusion layer is 400 (Hv) or less.

The disclosed high-strength thick steel plate satisfies prescribed chemical component composition requirements, and is useful as a structural material in marine structures, ships, bridges, and also as a material in pressure vessels in nuclear power plants. In the microstructure positioned at a depth of t / 4-t / 2 from the surface (t is the plate thickness, same below), the area fraction of bainite is 90% or greater, the average value of the bainite lath width is 3.5 [mu]m or less, and the circle equivalent diameter of island martensite in the bainite has a maximum value of 3.0 [mu]m or less.

The high-strength steel sheet includes, by mass %: C: 0.01% to 0.10%; Si: 0.15% or less; Mn: 0.80% to 1.80%; P: 0.10% or less; S: 0.015% or less; Al: 0.10% to 0.80%; Cr: 0.01% to 1.50%; N: 0.0100% or less; and a balance consisting of iron and inevitable impurities, in which a metallic structure is composed of ferrite and a hard second phase, the area fraction of the ferrite is 80% or more, the area fraction of the hard second phase is 1% to 20%, the fraction of unrecrystallized ferrite in the ferrite is less than 10%, the ferrite grain sizes are 5 μm to 20 μm, and the fraction of the ferrite crystal grains having an aspect ratio of 1.2 or less in the entire ferrite crystal grains is 60% or more.