BRASS MASTERS, INC.
“Serving your brass needs since 1950”
February 26, 2014
Ms. Sabrina Nilufar
Talbot Laboratories, Inc.
104 South Wright Street
Urbana, IL 61801-2958
Dear Ms. Nilufar,
I am pleased to report that the testing of your brass wedges is complete. You will find included a summary of our findings along with charts and micrographs of our results. A full laboratory report is available upon request. You are free to use these results as needed and to publish them as documentation for your finished brass products.
Four brass wedges were tested. Two were cold rolled to a thickness of 5.0 mm and two were cold rolled to a thickness of 2.5 mm. One wedge of each thickness was then annealed for 1 hour at 350 °C. Because the wedges varied in thickness across the length, multiple cold work values were able to be recorded. Hardness and thickness measurements were taken before and after the cold rolling and after the annealing as shown in Figure 1. Generally, as cold work increased, hardness increased.
As the wedges were rolled, the width slightly increased and the length significantly i...
In the years 1777 to 1778, while General George Washington was settled in Valley Forge with his forces, the Continental Army was falling apart. It became difficult for Washington to keep leading when his soldiers kept retreating. My position is a soldier in the army who will be allowed to leave in one month, but I will not leave. The soldiers at Valley Forge in 1777 and 1778 should have stayed. The Continental Army needed everyone they could keep, the death toll was low, and George Washington was a fantastic leader.
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The Canadian Shield is a landform region that covers almost more than half of Canada, it was formed about 3 billion years ago and was formed by volcanic eruptions. The Canadian Shield has some of the world's oldest rocks and has a lot of trees, lakes and rivers, some things the Canadian Shield provides us with is minerals, water from hydroelectric power and trees. it is a medium populated area and the population is very scattered, most of the people live in the southern area.
In Jared Diamond’s excerpt from his book, Guns, Germs, and Steel, he puts forward the historical narrative of how human evolution progresses at varying rates for different cultures due solely to the particular geographic region that people assimilate from. Diamond supports this thesis with specific evidence on the importance of food production, emphasizing that food is the main ingredient needed for a population to experience progress and growth, enabling that culture to expand around the world. I agree with Diamond’s dissertation and find it compelling due to his logical evidence and ethos on the topic.
The micro hardness of the prepared samples were obtained by using a Vickers Micro hardness Tester (Model : Leco LV 700, USA). 5 readings were taken for each sample to calculate the average hardness. An indentation load of 5gf was used. After calculating the average hardness for each sample, mean variance and standard deviation (S.D.) was calculated to check the consistency of the data.
The heat input rate is one of the most important variables in fusion welding, since it governs heating rates, cooling rates and weld pool size. In the welding of steel, this is important relationship since increased cooling rates increase the risk of hydrogen-induced cracking. The other metallurgical feature that is directly affected by the heat input rate is grain size in the heat affected zone (HAZ) and in the weld metal. In steel welding it is necessary to seek a heat input rate that gives the optimum combination of grain size and cooling rate [11]. Before the actual welding is done, all the earlier steps such as layout, plate edge preparation, fit up and alignment should be well planned with regard to achieving...
...sumption, creates emission of greenhouse gases and other harmful chemical materials. Once released into the air, it can cause environmental problems, which in turn threatens not only the environment, but also the health of the people who live in it. In order to reduce the use of energy to help protect our planet and our health, the diamond mining industry has implemented renewable energy programs to monitor energy and carbon emission. Since its beginning, mining company PHP Billiton program has saved an equivalent of one million liters of diesel fuel per year at their Ekati Diamond Mine in Canada’s Northwest Territories. The health of the environment and the health of humanity are as one. Whatever we do to our planet, we do to ourselves. Reducing energy consumption of diamond mining not only helps protect our planet, but also helps protect the health of our people.
Die-forming of sheet metal has been around for thousands of years. Originally the metal was manipulated by hand and hammered into the depression, by utilizing crude grooves carved into wood or stone. This technique was used to make spouts, handles, and other forms. Since then, however; they have undergone a remarkable technological evolution. Mate-female conforming dies to create hollow forms by using hydraulic pressure or drop hammer pressure, changed die-forming forever (Paisin, 2013).
Huddie William Ledbetter also known as "Leadbelly" was an American folk singer and blues musical, most famous for his strong prominent vocals and his ability to play thetwelve-string guitar. Leadbellys astounding ability to play the guitar combined with his personal life experiences provided the foundation for his musical career. He also wrote about mainstream culture and black culture in general to express feelings of anger, sadness, and expose the wrongdoings of American society against blacks.
When the Spanish were trying convert the native Mexicans to Christianity, their efforts weren’t very effective. Slow progress was being made, but it wasn’t good enough; the Spanish tried adopting imagery from the native culture, and, although it worked better, it still didn’t have the full desired effect. Only after an Indian convert had a vision of a dark-skinned Virgin Mary on ground holy to older religions did people begin to truly convert. He ground was dedicated to an Aztec goddess, and his vision began shifting the perspectives of other natives. With no experienced evidence of Christianity, they had no reason to believe in the faith. However, the convert’s vision changed this: they had to truly live and experience the faith in a way that was meaningful to them in order to accept it. By allegedly having this vision of a Virgin Mary that fit their image of a holy figure on ground that was already sacred to them, this convert completely reshaped the boundaries of experienced spirituality and religion in Mexico.
The aim of this discussion is to examine how the groundbreaking introduction of economically variable steel impacted Louis Sullivan’s overall design Scheme. The discussion will explore steel and the benefits it carried with it. Furthermore, the discussion will examine Louis Sullivan’s contribution to high-rise steel construction and what other where doing in the same period, comparing it to his innovative Wainwright building, in St. Louis (1890). The discussion will focus on and analyze an article published by him in 1896 ‘the tall office building artistically considered’, of how ornamentation and structural mass become one. With this, we can apply this philosophy of ornamentation to the Wainwright building. Through this exploration one hopes to gain a better understanding of how influential the introduction of Steel was to Louis Sullivan’s Scheme of creating a new American Architecture.
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