Brass texture

The properties of alloys are affected by their composition and structure. Not only is the crystalline structure important, but the size and texture of the individual grains also contribute to the properties of an alloy. Some metal alloys are one-phase homogeneous solutions. Examples are brass, bronze, and the gold coinage alloys. Other alloys are heterogeneous mixtures of different crystalline phases, such as tin-lead solder and the mercury-silver amalgams used to fill teeth. 

There has been increasing interest in the process of electro-plating plastics. Plating can produce chromelike, brass, silver, gold, or copper surfaces in both smooth and textured forms. There are several systems available commercially for plating plastic materials. In the case of certain plastics such as electroplated ABS, it can be surface-treated chemically to promote bonding of the metals in subsequent steps. 

Cylindrical pellets of four industrial and laboratory prepared catalysts with mono- and bidisperse pore structure were tested. Selected pellets have different pore-size distribution with most frequent pore radii (rmax) in the range 8 - 2500 nm. Their textural properties were determined by mercury porosimetry and helium pycnometry (AutoPore III, AccuPyc 1330, Micromeritics, USA). Description, textural properties of catalysts pellets, diameters of (equivalent) spheres, 2R, (with the same volume to geometric surface ratio) and column void fractions, a, (calculated from the column volume and volume of packed pellets) are summarized in Table 1. Cylindrical brass pellets with the same height and diameter as porous catalysts were used as nonporous packing. 

The notation hkl)[uvw specifies what is called an ideal orientation. Some metals and alloys have sheet textures so sharp that they can be adequately described by stating the ideal orientation to which the grains of the sheet closely conform. Most sheet textures, however, have so much scatter that they can be approximated symbolically only by the sum of a number of ideal orientations or texture components, and even such a description is inadequate. Thus, the deformation texture of brass sheet (70 Cu-30 Zn) is very near the ideal orientation (110)[Tl2]. But both the deformation and recrystallization textures of low-carbon sheet steel have so much scatter that the grain orientations present can be accurately represented only by a graphical description called a pole figure. 

The deformation texture of brass sheet (Fig. 9-19) is fairly sharp, and it is then of interest to know whether or not it can be approximated by an ideal orientation. To find this orientation we successively lay several standard projections over the pole figure, looking for a match between (111) poles and high-density regions. The solid triangles in Fig. 9-19 show such a match they represent the (111) poles of a single crystal oriented so that its (110) plane is parallel to the sheet and the [Tl2] direction parallel to the rolling direction. Reflection of these poles in the... 

Since the early days of texture research the fact that fee metals and alloys develop two different types of rolling texture, the copper type and the brass type, has been a mystery to the texture community. One may say that it is the classical texture problem. As mentioned in section 1 it was already in the nineteensixties suggested, on the basis of circumstantial evidence, that the texture transition is governed by cross slip. In 1968 one of the present... 

This is one of the main parts of the device. Indeed, the CVD reaction is thermally activated and the temperature has a great influence on the speed and the growth method, as well as the deposit texture. The furnace is composed of a brass block which has the shape of a parallelepiped measuring 8 x 8 x 1.6 cm it is placed at the... 

In steels, moderate plastic deformation and low annealing temperature are beneficial in developing the recrystallization texture. Planar anisotropy increases with increasing deformation and higher annealing temperature in copper sheets, whereas the inverse is found in brass sheets [28]. 

OPAQUE METALS (Auto Bumper, Brass Doorplate) SPBCUUfl COLOR BY SPECULAR reflection Analyzed by Color Scal, Specular Gloss, Distir)clriesS Of>iinage Gloss, Luster, Directionality, or Surface Texture HAZE BY DIFFUSE REFLECTION Analyzed by Rtflaction Haze... 

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