"Austenite" Essays and Research Papers

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    Materials

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    School of Mechatronics Engineering Assignment Material Engineering ENT 145 Name: Ahmad Huzaifah Bin Azahari No. Matrik: 121110055 Course: Mechanical   QUESTION 1 DESCRIBE CHARACTHERISTICS OF (a) AN ALLOY (b) PEARLITE (c) AUSTENITE (d) MARTENSITE (e) CEMENTITE (f) SPHERODITE AND (g) TEMPERED MARTENSITE. (a)ALLOY • Alloy steel is often subdivided into two groups: high alloy steels and low alloy steels. The difference between the two is defined somewhat arbitrarily. However

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    Sciences‚ VIT University‚ Vellore 1 Phases in Fe–Fe3C Phase Diagram α-ferrite - solid solution of C in BCC Fe • Stable form of iron at room temperature. • The maximum solubility of C is 0.022 wt% • T Transforms t FCC γ-austenite at 912 °C f to t it t γ-austenite - solid solution of C in FCC Fe Fe3C (iron carbide or cementite) • This intermetallic compound is metastable‚ it remains as a compound indefinitely at room T‚ but decomposes (very slowly‚ within several years)

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    seriesOrganizational structure and use conditions‚ the chromium cast iron can be divided into three categories: 1) with good high temperature properties of chromium white cast iron.This cast iron chromium content of 33% of their organizations‚ most of the austenite andiron chromium carbide‚ sometimes ferrite. This alloy in addition to a certain degree of wear resistance in high temperature operating conditions the temperature not higher than1050 ° C‚ with good oxidation resistance. 2) with good wear resistance

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    ME2151-2 – Metallography (C8) Formal Report Objectives * To obtain experience in the metallographic preparation of metallic specimens. * To observe the various microstructures in a welded mild steel joint. Results Overview of 5 different microstructures in welded steel Detail microstructures of 5 different zones Discussion and analysis of results * The heat affected zone is a composition of parent metal which was heated to a high enough temperature for a sufficient period

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    MEC281 TUTORIAL

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    EM/JUNE14/MEC281 UNIVERSITI TEKNOLOGI MARA MEC281 MATERIAL SCIENCE Chapter 1: Structure TUTORIAL 1: Atomic Structure 1. Define : i. Atomic Mass ii. Atomic Number iii. Isotopes 2. Give the electron configurations for the following ions : i. Oxygen ii. P5+ iii. Ni2+ iv. Br- v. Cu PERIODIC TABLE MEC 281 EM/JUNE2014/MEC281 UNIVERSITI TEKNOLOGI MARA MEC281 MATERIAL SCIENCE Chapter 1: Structure TUTORIAL 2: INTERATOMIC BONDING‚ CRYSTAL STRUCTURES 1. Specify the type of atomic

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    Jominy End

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    quenching process‚ and it is very important to the components of machine especially tool steel. One of the methods to determine the hardenability of steels is Jominy End-Quench Test. Hardening usually involves quenching where the steel is heated to austenite phase and fast cooling in the quench medium such as water‚ oil‚ salt solution‚ or air to produce microstructure of martensite. The martensite gives hard and brittle properties of steel. Usually‚ for heavy steel components‚ the hardness decreases

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    The Iron-Carbon Diagram

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    cementite because it is hard. Following phases exist on Fe-Fe3C diagram: - liquid solution of iron and carbon (L) - ferrite ( ) – an interstitial solid solution of carbon in Fe (bcc). At room temperature ferrite is ductile but not very strong. - austenite - an interstitial solid solution of carbon in Fe (fcc). - cementite (Fe3C) hard and brittle compound with chemical formula Fe3C. It has metallic properties. On a base of Fe-Fe3C diagram we can divide iron-carbon alloys into: - steels‚ - cast steels

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    Objective The purpose of the Jominy test in this experiment is to determine the hardenability of three types of steels‚ namely EN 8‚ EN 16 and EN 24. Introduction This report will try to illustrate how the hardenability of these types of steels vary and why. This will be done by using the Jominy end quench test on each of the test pieces and then testing the hardness of the particular steel from the quenched end‚ to the end of the test piece. Taking these different points will enable me to find

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    metallography log

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    temperature caused austenite grains to grow significantly. During the cooling to room temperature‚ this effect is retained as a region of coarse alpha-ferrite grains and Widmanstatten ferrite and pearlite. Zone 3: grain refinement zone In the grain refinement zone‚ the grain boundaries are closed and many small grains can be seen forming. This is because when the metal is cooled to room temperature‚ the austenite grains will start to nucleate at many points to form smaller austenite grains‚ and when

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    Metalografi Case Study

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    temperature so that the phase ferrit and transform into pearlite austenite phase. Heating process is done depends on carbon content contained on the material. If you want to convert the material into austenite phase as a whole until keinti then the time warming up must be added. The speed of the warming also must be controlled so as not to cause gradients between surface with core part which will degrade the quality of the product. Austenite phase is reached after further cooling or quenching is done

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    Heat Treatment of Mild Steel

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    Title: Heat Treatment of Ferrous Objective: To determine the effect of heat treatment on mechanical properties of 1050 Steel. To reveal the microstructures of 1050 steel during heat treatments. Abstract In this experiment‚ we observed how the properties of plain carbon steel vary with the heat treatment condition. We prepared six different samples in three different heat treatment configurations and performed hardness tests on them by using the Rockwell tester and observed the microscopic

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    JOMINY TEST Design & Manufacturing Plan of a Jominy Testing Device Bachelor ’s thesis Mechanical Engineering & Production technology Riihimäki 2012 James Alison Orivri ABSTRACT Unit Name of degree programme Option Author Jominy Test James Alison Orivri Year 2012 Design & Manufacturing Plan of a Jominy Testing Device ABSTRACT The purpose of this work is to make one of the many heat treatments devices- Jominy end quenching testing machine of manufacturing processes. In the process

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    Heat Treatment of Steel

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    reach above hardening point or Decalescence. If steel is heated above a critical point‚ then it should be cool down slowly because the grain of annealed steel is coarseness. “Process annealing is done by raising temperature just below the Ferrite-Austenite region line A1 on diagram.” Annealing is also used to hardened parts which are made out of

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    Final 2002

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    Therefore‚ Wαe = Wα − Wα’ = 0.95 − 0.56 = 0.39 2. Consider 1.0 kg of austenite containing 1.15 wt% C‚ cooled to below 727°C. (a) What is the proeutectoid phase? (b) How many kilograms each of total ferrite and cementite form? (c) How many kilograms each of pearlite and the proeutectoid phase form? (d) Schematically sketch and label the resulting microstructure. This problem asks us to consider various aspects of 1.0 kg of austenite containing 1.15 wt% C that is cooled to below the eutectoid. (a)

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    Manager Operations

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    Svensson. Impact toughness of C–Mn steel arc welds - bayesian neural network analysis. Materials Science and Technology‚ 11:1046–1051‚ 1995. 13 [24] M. A. Yescas-Gonzalez‚ H. K. D. H. Bhadeshia‚ and D. J. C. MacKay. Estimation of the amount of retained austenite in austempered ductile irons. Materials Science and Engineering A‚ A311:162–173‚ 2001. [25] R. C. Dimitriu and H. K. D. H. Bhadeshia. Hot-strength of creep-resistant ferritic steels and relationship to creep-rupture data. Materials Science and Technology

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    metal is heated at certain temperature‚ then it is slowly cooled. First‚ the steel is heated at a temperature of about 16000F (8710C) for a certain amount of time (“Annealing of Tool Steel”). During annealing‚ ferrite‚ which is pure iron‚ turns into austenite‚ another type of iron (“Full Annealing”). The heating time is dependent upon the size of the specimen to be annealed‚ which is about two hours per inch thickness of the specimen (“Annealing of Tool Steel”). After the metal is heated for the desired

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    Entc 207 Test 3 Review

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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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    Zac Clingaman ENTC 207-502 4/22/2013 Stainless Steel Comparison 302 AISI 302 is the most basic type of steel in the chromium-nickel group. It is an austenitic steel‚ which is used for chemical resistance and hardenable by cold work. It contains 18% chromium and 8% nickel. It has corrosion resistance to mild-atmospheric and fresh water‚ industrial atmospheric‚ marine atmospheric‚ mild chemical and oxidizing chemical environments. Type 302 is also highly resistant to gasoline. 303 AISI

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    Hardness Testing

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    Engineering Materials 1 Title: Objective: Hardness and Impact Tests of Steels To understand the mechanical properties of a metal (steel) particularly the relationship between hardness and impact Equipments: Rockwell Hardness tester and Charpy Impact tester Samples: 1. Gauge plate – about 0.9%C As supplied (annealed): AS Water quenched: WQ Oil quenched: OQ Water quenched + tempered: WQ + T Oil quenched + tempered: OQ + T 2. Key steel – about 0.4%C As supplied (annealed): AS Water quenched:

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    Good

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    Jannet Reyes Arts 1301 Mr. Valenzuela October 4‚ 2011 “The Portrait” At the El Paso Museum of Art I saw many beautiful and wonderful paintings and sculptures but the “The Portrait” was the sculpture that caught my attention the most. “The Portrait” was sculpted by Frances Bagley an American artist born on April 7‚ 1946 in Fayetteville‚ Tennessee. Frances Bagley lives and works in Dallas‚ Texas. “The Portrait” was created in 1997 and it is made out of stainless steel and marble. I believe

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