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Nt1310 Unit 3 Lab Report

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Lab 1 helps create a better understand of the changes in crystal structures when the annealing and quenching process is applied to 1020 and 1080 steel. The numbered steel refers to the ASTM grain-size number. Formula 1 is used to solve for the grain size. n=2^(G-1) Equation (1) at 100x magnification
Crystal structures change shapes which changes the strength of the material and its properties. The metal might become soft, brittle, hard, or ductile. The four test specimens are all made from cold drawn steel. When steel is cold drawn, the crystal structure changes and creates stress. The stress in the grains can be reduced by the process of annealing. Quenching creates small stresses because carbon does not have time to escape. The annealing process is when …show more content…

Creating larger grain boundaries makes the steel more ductile due to there being less paths for dislocations on the boundaries. The grain boundaries are caused by a dislocation. When there is an extra plane of atoms, or a plane of missing atoms, a gap is created causing the grain boundaries. Pearlite, as shown in figure 1 picture B, is caused when the steel is annealed. Pearlite has multiple layers that consist of ferrite and cementite. Ferrite is has a crystalline structure known as a Body Centered Cubic structure. Ferrite is a ceramic compound that has very little carbon causing it to be soft and ductile. Cementite is also a ceramic that has more carbon than ferrite. Quenching a metal is slightly different than annealing. When the steel is heated up, the steel is then rapidly cooled down is water or oil. When the steel is quenched, the heat energy within the center of the part is pulled out quickly. The process of cooling rapidly cooling down the steel creates lots of tinny grain boundaries on the surface. The small grain boundaries are called martensite, as seen in figure 1 picture C. Martensite is a very hard microstructure due to having a dense amount of grain boundaries. The martensite crystals

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Lab 7: Moon Phases was designed to measure the relative position of the Sun and Moon over the course of one phase cycle (i.e. one month, 29.5 days) The idea for Lab 7: Moon Phases was to examine how the illumination of the moon by the Sun produces the different phase cycles we see as the Moon rotates around Earth and as the Earth rotates around the Sun. The observations of the Moon were taken on four different days in the month of February to March capturing four different Moon Phases.

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7.7.1 Data Owners 1. One whose going to access files, one who owns file, who requires his data to be secure. 2. Data owners are responsible for encrypting the data by generating private key. MMCOE, Department of Computer Engineering, 2015-2016 26 Regeneration of code based cloud storage 3.

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Medical biller is a position that will require you to take in medical claims and code them and bill out medical claims to insurance companies, Medicare and Medicaid on a daily basis. You will have to reconcile Explanation of Benefits (EOB) weekly. Verify if insurance companies require that patients get PA for certain procedure and products. Five requirements for Medical Biller position 1. How to bill claims 2.

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\section{Building Blocks} \subsection{Access Structures} \textbf{Definition 3.8.}(Access Structure\citeup{beimel1996secure}) \emph{Let $\{P_1, P_2,...,P_n\}$ be a set of parties. A collection $\mathbb{A}\subseteq 2^{\{P_1,P_2,...,P_n\}}$ is monotone if $B\in\mathbb{A}$ and $B\subseteq C$ implies $C\in\mathbb{A}$. An access structure is a monotone collection $\mathbb{A}$ of non-empty subsets of $\{P_1,P_2,...,P_n\}$, i.e., $\mathbb{A}\subseteq 2^{\{P_1,P_2,...,P_n\}} \setminus\{\emptyset\}$. The sets in $\mathbb{A}$ are called the authorized sets, and the sets not in $\mathbb{A}$ are called the unauthorized sets}. In our settings, attributes will play the role of the parties such that the access structure $\mathbb{A}$ will contain the authorized

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Heat is another word for temperature when one considers thermal expansion. This could be from the outside temperature or direct heat of a flame. A Mississippi summer can easily reach 100 degrees or higher; and, therefore, when you consider this prolonged heat on a piece of metal such as a railroad track, the metal is going to continue to get bigger and expand. In order to prevent derails because the rails have buckled, engineers leave small gaps.

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This is because the steel is hard but brittle and has internal stresses. The solution to this is by tempering to increase toughness, reduce the brittleness but in turn reduces hardness. Tempering a steel heats up the steel to temperatures ranging from 200-500°C depending on the desired mechanical properties. Heating after the quenching allows the carbon to diffuse into the martensite to relieve internal stresses. The end result would be the shock absorption capability which depends on the tempering temperature (higher the temperature, higher the shock

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After steel is quenched, it is usually very hard and strong but brittle. Martensite looks needle

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Zinc coating systems protect coatings in much the same manner as galvanizing. Then, the process of building a ship is cutting steel. Steel plates are being cut into the parts that will form to the hull and deck sections of the ship. The process of heating and bending a steel plate into curved shapes is of great importance in shipbuilding and requires sophisticated skill and technique.

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This layer very effectively separates the material from the surroundings. It is adherent, coherent and insoluble under normal conditions. Increasing the chromium content, from the minimum of 10.5% necessary for "stainless steel", to 17 to 20%, greatly increases

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