4140 Steel The first metal sample that will be discussed is 4140 steel. This sample was subject to multiple heat treatment processes that included quenching‚ normalizing‚ full annealing‚ and tempering. The micrographs of the heat treated samples can be seen below in Figure 2. Figure 2: 4140 Steel Micrographs 100X a) Baseline‚ prepared by Bryan Biggs b) Quenched‚ prepared by Cameron Palkowski c) Normalized‚ prepared by Michael Rodriguez d) Full Annealed‚ prepared by Avery Callahan e) Tempered
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Development‚ Vol. 10‚ No. 3‚ September (2006) ISSN 1813-7822 Effect of Addition of Steel Fiber on the Compressive Strength of Composite Concrete Materials under High Temperatures (Experimental & Statistical Work) Asst. Lect. Sawsan Akram Hassan Civil Engineering Department‚ College of Engineering Al-Mustansiriya University‚ Baghdad‚ Iraq Abstract This study presents the benefit gained from using steel fiber reinforcement on concrete mixture. The effect of fire on compressive strength
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Book Review Katrina Yurkiw Guns‚ Germs‚ and Steel: The Fates of Human Societies Jared Diamond W. W. Norton and Company April 1st‚ 1999 480 Pages ISBN: 0393317552 Guns‚ Germs‚ and Steel is a fascinating perspective taken by Professor of Geography and Physiology at UCLA‚ Jared Diamond. Diamond’s purpose was to explain why Eurasian civilizations have had such immense success conquering people and land other than their own. Diamond’s aim is to answer Yali’s question: Why is that white people
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In the article‚ “Sunken Steel Cages Could Save Coral Reefs”‚ Gaia Vince discusses that sunken steel cages may help restore endangered coral reefs. First‚ Vince explains how the steel cages are showing results for the endangered reefs. Carbon dioxide is above the level that it needs to be‚ and that is part of why coral reefs are going extinct. The metal cages do not fix that problem‚ but they appear to show results. The steel cages are connected to a long electrical cable that triggers a chemical
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The Virginia Plan‚ drafted by James Madison and proposed at the Constitutional Convention by Edmund Randolph‚ was to install a national government with a bicameral legislature and was to be comprised by representative that held seats‚ in the new congress‚ in proportion to each states population. After the delegates at convention accepted the Virginia Plan as a basis to build on the national government‚ debate quickly arose against the share of distributed legislative power the northern states would
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Throughout his speech in which he condemned companies for raising steel prices‚ Kennedy repeatedly appeals to a sense of communal sacrifice and collective responsibility in order to rally his everyman audience around this ostensible cause for outrage. From the beginning‚ Kennedy‚ a millionaire Harvard graduate‚ includes himself in the aggrieved camp of everyday Americans by using the first person “we”. The list of sacrifices being made by the “185 million Americans” are thus shared by him as well
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Reflection on Guns‚ Germs‚ and Steel Jared Diamond: A Genius or a Nut Case? My Review of Guns‚ Germs‚ and Steel It was the prehistory of the world that drew attention to Diamond’s brain that gave him the wonderful thought of writing this book about how our world is today‚ with the differences of culture‚ cargo‚ religions‚ skin color‚ etc. One simple question his friend Yali asked‚ “Why is it that you white people develop so much cargo and brought it to New Guinea‚ but we black people had little
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High Speed Steel * High Speed Steel (HSS) refers to any of a variety of steel alloys that engineers primarily use to construct machine tool bits and blades and drill bits for industrial power tools. Materials scientists can infuse this steel with differing percentages of elements to form a variety of HSS manufacturing alloy types. While all of these different types exhibit HSS’s characteristic resistance to high-temperature‚ the properties of each alloy will vary depending on the percentage of
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100% BIOGAS FOR URBAN TRANSPORT IN LINKÖPING‚ SWEDEN BIOGAS IN BUSES‚ CARS AND TRAINS BIOGAS IN THE SOCIETY Information from IEA BIOENERGY TASK 37 Energy from biogas and landfill gas SUMMARY The Linköping Biogas plant in Sweden was started in 1997 in order to treat organic waste from the agricultural sector in southeastern Sweden. Another main purpose was to produce biogas for the urban city buses in order to reduce the local‚ regional and global emissions from the urban transport system
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[pic] Guns Germs and Steel Humans have lived on this planet for thousands of years. Over the time‚ they learned‚ developed‚ acquired knowledge‚ and civilized in the process. Yet‚ this learning can’t be construed to be complete‚ leaving a lot to be learned. Along the way‚ human race has evolved by generating vast amounts of food‚ domestication of plant and animals‚ along with battles and illnesses. The primitive human who survived on hunting has reformed into modern human as we
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