then dim the lights or use a dark bucket. The clay coat allows the blade to be further cooled at two different speeds. The uncoated part will cool faster making it harder. The process is called martensite and happens when steel‚ which is made from iron and carbon‚ changes temperatures rapidly. Martensite is how Katanas get their curve. Repeat the process to get an even meaner curve on your
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A Full Laboratory Report on: The Detailed Microstucture of Primary Materials This report presents a study on the microstructure of 8 material samples using the proper optical microscopy techniques. Emphasis is given in sample preparation‚ the right use of transmitting and reflecting optical microscopy methods‚ and a detailed analysis of the distinct microstructure of metal‚ ceramic‚ and polymer materials. For metals and ceramics‚ preparation procedures include grinding‚ polishing‚ and surface
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Introduction: Today’s aggressively competitive business environment has led to companies recognizing more and more the imperative of strategically positioning themselves in order to remain competitive. The propagation of goods and services‚ continually improving modes of operation‚ quality standards‚ innovation‚ information etc‚ have spawned commoditization and replication of offerings‚ and with them‚ unremitting competition‚ hence the imperative of differentiation. Applying the principles of
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JFE TECHNICAL REPORT No. 10 (Dec. 2007) Newly-Developed Ultra-High Tensile Strength Steels with Excellent Formability and Weldability† MATSUOKA Saiji*1 HASEGAWA Kohei*2 TANAKA Yasushi*3 Abstract: JFE Steel has developed and commercialized ultrahigh tensile strength steel series from TS780 MPa to 1 470 MPa with excellent formability and weldability which reduces weight and increases safety in collision when they are applied to the reinforcement parts around a cabin. Those ultra-high
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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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Introduction: In early 60’s a historical survey of metallurgical research where bainite was discovered. This microstructure was named by Bian’s colleageus at the United States Steel Corportion. At first microstructure of martensite and bainite seem similar‚ which had many aspects on their transformation of mechanisms. Microstructure of bainite seems to be darker than the mastenisite under a microscope. The reason behind bainite structure became useful was because of its hardness. There are few
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Stainless Steels: must have at least 10% chromium A. Ferritic Stainless Steels: Iron‚ chromium + low carbon a. Magnetic b. Lowest cost c. Non-hardenable i. Can be annealed d. BCC structure e. Low carbon ii. Less than .2% f. Chromium content iii. 16-20% g. B. Martensitic Stainless Steel: iron‚ chromium + higher carbon h. Magnetic i. Martensitic Structure j. Hardenable k. High Carbon
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Materials Final Review (TESTS I‚ II‚ & III) Part I : Multiple Choice 1) As the temperature of a polymer increases‚ its density a. Increases b. Decreases c. Remains fairly constant 2) Which one of the three polymer types does not involve cross-linking: a. Elastomers b. Thermoplastics c. Thermosets 3) Degree of polymerization is which of the following: a. Average number of mers in the molecule chain b. Proportion of the monomer that has been polymerized c. Sum of the molecule weights of the
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resistance. 2) with good wear resistance of chromium white cast iron (referred to as the high chromium cast iron). In addition to this cast iron containing 12% to 20% chromium‚ it also contains the right amount of molybdenum. When the matrix all of martensite‚ the wear resistance of this alloy is best. If the retained austenite matrix‚ usually heat treatment. 3) low chromium alloy white cast iron. Compared with ordinary white cast iron‚ cast iron carbide in better stability. The wear mechanisms can
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Class 1 Metallic bonding: Found in metals and alloys‚ 1‚ 2‚ or 3 valence electrons that are not bound to any particular atom in the solid. They drift throughout the entire metal. This results in a sea of electrons. These free electrons result in good electrical and heat conductivity. Coordination number is 8 or 12 (number of nearest neighbors). Ionic Bonding Found in compounds that are composed of both metallic and nonmetallic elements. Metallic element gives up valence electrons to the
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