Coursework 4 According to Tuckman and Jensen (1977)‚ there are five stages of group development. The five stages are “forming”‚ “storming”‚ “norming”‚ “performing”‚ and “adjourning”. Forming is when everyone is instructed to group together for a particular purpose and understand the task to be accomplished but there are sceptical between each other. This is the period of "testing-out" our group members. Storming is where some minor confrontations will arise that is quickly dealt with
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26 2.3 Metal Forming Valery Marinov‚ Manufacturing Technology SHEET METALWORKING Classification of Sheet Metalworking Processes Basic sheet metalworking operations: (a) bending‚ (b) drawing‚ and (c) shearing; (1) as punch first contacts sheet and (2) after cutting. Force and relative motion are indicated by F and v Cutting Operations Shearing Shearing is a sheet metal cutting operation along a straight line between two cut-ting edges by means of a power shear. Shearing
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Metal fabrication is the building of metal structures by cutting‚ bending‚ and assembling processes: Cutting is done by sawing‚ shearing‚ or chiseling (all with manual and powered variants); torching with hand-held torches (such as oxy-fuel torches or plasma torches); and via numerical control (CNC) cutters (using a laser‚ mill bits‚ torch‚ or water jet). Bending is done by hammering (manual or powered) or via press brakes and similar tools. Modern metal fabricators utilize press brakes to either
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Transition Metals 1a) The d-orbitals of a free transition metal atom or ion are degenerate (all have the same energy.) However‚ when transition metals form coordination complexes‚ the d-orbitals of the metal interact with the electron cloud of the ligands in such a manner that the d-orbitals become non-degenerate (not all having the same energy.) The way in which the orbitals are split into different energy levels is dependent on the geometry of the complex. Crystal field theory can be used to predict
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extrusion • Analysis of the extrusion process • Cold extrusion and cold-forming • Hydrostatic extrusion • Extrusion of tubing • Production of seamless pipe and tubing Suranaree University of Technology Tapany Udomphol Jan-Mar 2007 Objective • This chapter aims to provide useful information on different extrusions processes‚ which can be mainly divided into direct and indirect extrusion processes. This also includes basic background on hydrostatic extrusion‚ extrusions of tubing and production
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Extraction of metals The History of Metals. Metals have been used by people for many thousands of years. Gold and silver‚ found as native metal‚ were used both as jewellery and as a status symbol - nothing new there. These metals were known in the Stone Age‚ but gold and silver are too soft to be used as tools. The first really useful metal to be discovered was bronze. This began the Bronze Age. Bronze was used extensively for tools and weapons in Asia and Africa from 4‚500 B.C. (6‚500 years
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STRENGTHENING OF METALS There are 4 major ways to strengthen metals‚ and all work because they make dislocation motion more difficult. They also reduce the ductility: 1) Cold work (Strain Hardening) 2) Reduce grain size (Strengthening by Grain Size Reduction) 3) Add other elements in solid solution (Solid Solution Strengthening) 4) Add second phase particles (Precipitation or Age Hardening) • These mechanisms may be combined. • For example‚ the world’s strongest structural material (with
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WAYS OF FORMING WORDS Compounding is the word formation process in which two or more words combine into a single new word. Compound words may be written as one word or as two words joined with a hyphen. Shortening is the word formation process in which a word is reduced or shortened without changing the meaning of the word. Blending is the word formation process in which parts of two or more words combine to create a new word whose meaning is often a combination of the original words.
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Metal identifiers are electronic hardware (compact) that can be utilized to locate a concealed fortune trove of gold‚ coins‚ ancient rarities‚ collectibles and other profitable metal things that are covered and lay covered up in the ground or water. Metal discovery has gotten to be a standout amongst the most prevalent distractions everywhere throughout the world with a large number of individuals enjoying it with family and companions. Regardless of whether you are a tenderfoot or experienced
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Chemical Prperties of Metals Most metals are chemically reactive‚ reacting with oxygen in the air to form oxides over changing timescales (for example iron rusts over years and potassium burns in seconds). The alkali metals react quickest followed by the alkaline earth metals‚ found in the leftmost two groups of the periodic table. Examples: 4Na + O2 → 2Na2O (sodium oxide) 2Ca + O2 → 2CaO (calcium oxide) 4Al + 3O2 → 2Al2O3 (aluminium oxide) The transition metals take much longer to
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