Metals and alloys. Hume-Rothery rules. 1. Three types of metals. 2. Alloys. Hume-Rothery rules. 3. Electrical resistance of metallic alloys. 4. Applications of metallic alloys. 5. Steels. Super alloys. 6. Electromigration in thin wires. Three types of metals Metals share common features that define them as a separate class of materials: • Good thermal and electrical conductors (Why?). • Electrical resistance increases with temperature (Why?). • Specific heat grows linearly with temperature
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DEVELOPMENT OF CORROSION RESISTANT GALVANISING ALLOYS By BO ZHANG A thesis submitted to The University of Birmingham for the degree of DOCTOR OF PHILOSOPHY Metallurgy and Materials School of Engineering The University of Birmingham July 2005 University of Birmingham Research Archive e-theses repository This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as
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Abstract This experiment will explain what the Rockwell hardening test is and why it is used‚ how the experiment was conducted‚ data that was found‚ and the importance of testing the hardness of materials. This experiment explains and proves how the hardness of materials can be increased by alloying and heat treating. Intro – Rockwell Hardness Testing Soft and hard qualities exist in materials. In materials‚ hardness measures the ability of a material to resist scratching‚ indentation‚ or penetration
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is the act of deterioration in metals.[1] A chemical reaction occurs between the metal and it’s environments Eg. Copper + Oxygen ( Copper Oxide Cu (I) + O ( CuO Rust is very similar to corrosion but only occurs in iron and steel (an iron alloy). Rust is formally known as oxidation‚ which occurs when Oxygen (O) comes into contact with iron (Fe). Overtime‚ the oxygen reacts and combines chemically with the iron‚ forming a substance named Iron Oxide (Fe2O3)‚ which weakens the physical bond
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Entrepreneurial Finance Philippe Gregoire Louvain School of Management – Université catholique de Louvain Reference book : Entrepreneurial finance‚ a casebook. Paul A. Gompers and William A. Sahlman. John Wiley & Sons‚ Inc. 2002 1 Entrepreneurial finance Project assessment (POCD) Funding (amount‚ firm’s value‚ best partner) Deal (ownership / control / incentives) Exit (IPO) Project Assessment • 4 critical success factors for entrepreneurial ventures People Opportunity
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Cobalt My report is about the element Cobalt. Cobalt is the 27th element on the periodical table and has an atomic number of twenty-seven. It has a symbol of Co. Cobalt¹s atomic weight is 58.9332. It has a melting point of 1‚490 C. and a boiling point of 2‚900 C. Cobalt looks almost exactly like iron and nickel. Cobalt is between iron and nickel on the periodical table and found in only . 001-.002 percent of the earth¹s crust. Cobalt was first found in the Harz Mountains. People in
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disguise on a website in order to acquire credit card information‚ social security‚ and other important information about the user. The first use of phishing started as far back in the 1990s when AOL had to deal with the hackers signing on as employees requesting billing and other information from account users. AOL had to put out a disclaimer stating that employees of the company would not request such information from their customers. The way phishers do their schemes‚ they take a website‚ like myspace
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material is going to be selected through comparisons among copper and aluminum alloys‚ which are commonly used in designing frying pan. This report is consisted of three parts. The first part is the introduction and objection. Second part is the findings and analyses through comparing two kinds of materials and the conclusion will be the last part. Objective People normally pick copper‚ cast iron‚ and aluminum alloys as the raw material for making a frying pan because of its mechanical properties
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Engineering Report Recumbent Bicycle Reynolds 853 The Reynolds 853 is a steel alloy created by Reynolds Cycle Technology‚ a manufacturing company based in Birmingham‚ England. It is composed of several elements solely including iron‚ carbon‚ chrome and molybdenum but also includes silicon‚ copper and manganese. The Steel’s physical properties include a stiffness level similar to mild steel. With the addition of chrome and molybdenum the steel can be strong enough to butt or be thinned down in
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North American Free Trade Agreement: NAFTA Introduction I believe that the North American Free Trade Agreement was an inevitable step in the evolution of the United States economic policy. The globilization of the world economy due to technological advances in computers and communications have shrunk the world to the point where no single country acting alone can effectively compete on the foreign market. Even the United States‚ with its vast resources‚ can not have an absolute advantage in
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