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The steel in this blade was a hypereutectoid, crucible-melted steel that was really quite clean. The principal inclusions were approximately 0.5 to 1.0 μm in diameter. The microstructure consisted of a pearlitic matrix with spheroidized primary cementite in a layered arrangement.
Damascus steel knives, characterization of one Damascus steel sword
A Damascus steel sword has been exhaustively examined to establish its chemistry, microstructure, properties, and something about its processing.
The cementite layers were aligned with amazing regularity with individual layers containing several particles [...]
A light emitting display apparatus has pixels arranged in rows to display a predetermined image, each of the pixels being composed of red and green, or blue and yellow light emitting diodes, lenses provided on the pixels, each of the lenses horizontally diffusing lights emitted from the red and green, or blue and yellow light emitting diodes, and vertically diverging the lights, a driver for driving the red and green, or blue and yellow light emitting diodes to be turned [...]
An LED lamp has a substantially planar circuit board having two opposed sides, and a plurality of light-emitting diodes (LEDs) grouped to form two LED arrays. The LEDs of one of the two LED arrays are mounted along opposite edges of one of the sides of the circuit board. The LEDs of the other LED array are mounted along opposite edges of the other side of the circuit board.
A light-emitting diode (LED) is a diode that emits light when a [...]
Positive identification of each tube and cable forming integral parts of a complicated mechanism has become practically indispensable.
For example, in a ship or aircraft, it is highly desirable to be able to quickly trace fuel, oil, water and fire extinguisher lines. This is especially true where these and other tubes and pipes converge for passage through a bulkhead or a like area restricted as to space. In view of the fact that the areas through which these lines pass are [...]
A further object of the present invention is to provide silver alloys having the desirable properties of reduced fire scale, reduced porosity and oxide formation and reduced grain size relative to traditional sterling silver alloys whilst providing improved work hardening performance over the current firescale resistant alloys. Other objects and advantages of this invention will hereinafter become apparent.
With the foregoing and other objects in view, this invention in one aspect resides broadly in firescale resistant, work hardenable jewelry silver alloy [...]
Sterling silver alloy compositions of exceptional and reversible hardness, and enhanced tarnish resistance
To make sterling silver, 925 Sterling Silver is alloyed with other alloys, such as 7.5% copper. While this results in sterling silver, the resulting alloy is relatively soft and tarnishable. As many will attest, conventional sterling silver tarnishes readily, and must typically be polished before use. The properties of sterling silver can be enhanced by increasing the hardness of the alloy, by making the hardness of such alloy [...]
The lower the frequency, the more obvious the mechanical force becomes until it reaches a frequency too low to be heard. But even at such low frequencies, sufficient energy can be absorbed to rattle windows and shake walls as well as to create mechanical energy in the turntable platter, its main board, its base, and its supporting structure. Each of these parts vibrates with its own characteristic resonances in accordance with varying amounts of acoustical energy in the room.
These mechanical [...]
Clear plastic tube is the product of synthetic resin additive processed by melt molding. Additives plasticizer, stabilizer, filler, lubricant, coloring agent, ultraviolet absorbent, modifier.
Commonly used clear plastic tube: hard polyvinyl chloride pipe (PVC-U), high density polyethylene pipe (PE-HD), cross-linked polyethylene pipe (PE-X) random copolymerized polypropylene pipe (PPR pipe), polybutylene pipe, engineering plastics acrylonitrile – butadiene – styrene copolymer (ABS) etc..
Characteristics of plastic pipe material composition determines the plastic pipe. The main advantage of plastic pipe:
(1) can be naturally curved or [...]
The mage is considered pure DPS occupation, leveling rather painful, level 80 before the recommended Copy + task, after level 80 recommended the task of upgrading, why not row in this, because it may be discharged to the throne of the tides and the origin of the hall this cheating stuff, experience less poor also long and smelly, no invalid rate, even copy tasks are not, but in addition to the two other several can row the recommended single row [...]
As previously reported, the nine Challenge Mode dungeons released with Mists of Pandaria will be shutting down at the end of the “challenge season,” widely speculated to be the pre-Warlords of Draenor “6.0” patch. Today, the Community Team offered some additional clarity on what the end of the season will look like in terms of rewards.
All CM achievements will turn into Feats of Strength.
Rewards like the “Undaunted” title and the Pandaren Phoenix mounts will become account-wide. More specifically, instead of [...]