with a proper selection of testing variables. The metallurgical aspect of SCC behaviour of Al 2024-T351 was also discussed based on the microstructural and fractographic examinations. 1. Introduction High-strength 2xxx and 7xxx series aluminium alloys are susceptible to stress corrosion cracking (SCC) which may cause a
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Where It All Started Today Baseball is considered America ’s national pastime. American ’s began playing baseball on informal teams in the early 1800 ’s. At this time they had only local rules that differed from place to place. Also‚ at this time there were no official baseball bats for the players to use. Many used sticks as bats. That is where stick ball came from which is still played today. Baseball was based on the English game of rounders. Alexander Joy Cartwright of New York invented
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Resistance of Commercial Aluminium Mayeedul Islam 1‚*‚ S. M. Najmul Hoque2‚ M. Abdullah Al Mahmood2‚ A. A. Shisir 2 ABSTRACT Aluminium and their alloys are widely used as construction materials from house hold appliances to air-craft parts. The commercially pure aluminium has merely low corrosion resistance and hardness compare to aluminium alloy. In this study an attempt has been made to study the influence of heat treatment on the properties of commercially pure aluminium. The investigation
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Scandium is the 21st element on the periodic table. This element can be located in the 4th period 3rd . The symbol for Scandium is Sc on the periodic table. Scandium is used for and is in many things. For example it is used to help grow crops such as corn‚ peas‚ and other seed grown plants. There are many protons and neutrons in Scandium. There are 21 protons‚ 24 neutrons‚ and 21 electrons. Scandium is also used in tracking devices. Scandium was discovered in Sweden 1879‚ by Lars Fredrick Nilson
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shear loads only. 2-2 D01 A main difference between Lockbolt/ Huckbolt tension and shear fasteners (other than their application) is in the A method of installation. B number of locking collar grooves. C shape of the head. 2-3 D01 Alloy 2117 rivets are heat treated A to a temperature of 910 to 930 蚌 and quenched in cold water. B by the manufacturer and do not require heat treatment before being driven. C by the manufacturer but require reheat treatment before
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Metals and alloys for nuclear energy There are two important ways in the making of nuclear energy: nuclear fission and nuclear fusion. Fusion and fission have a different working mechanisms‚ thus other materials are used. In a nuclear reactor fuel rods are bombarded with neutrons causing fission of the fuel. This way energy is released. With this energy water is heated to steam and with the use of heat exchangers and steam turbines electricity is generated. As fuel is usually uranium used‚ but also
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1. Where would you disconnect a chain? # a) At a bolted joint. b) At a spring clip joint. c) At an riveted joint. 2. How many strokes per minute should be used with a hacksaw? # a) 30 b) 55 c) 60 3. Unused holes in an electrical multi-pin connector should be a) fitted with pins # b) fitted with blanks c) left open 4. How many times can a locking plate be used? a) once‚ then discarded # b) indefinitely
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FERROUS AND NON-FERROUS ALLOYS Unit – 7 Ferrous: Iron based alloys Non-ferrous: other than ferrous alloys with no iron content FERROUS METALS AND ALLOYS What is a ‘ferrous metal’ or ‘ferrous alloy’? It is simply a metal or alloy that contains Iron (the element ferrous) as the base (starting) metal. 26th element Iron or Ferrous 55.85 Atomic Mass GENERAL CATEGORIES OF FERROUS METALS AND ALLOYS Carbon and alloy steels Stainless steel Tool and Die steel Cast Irons Cast
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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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Unit Name: Analysis at Work Unit Number: G621 Assignment Title: Finding the Percentage of Copper in a Brass Alloy Assignment: G620 Sample Assignment C Date Set: Due Date: Assessment Objective(s): AO3 Vocational Brief: Brass is an alloy of copper and zinc. This alloy has many uses ranging from coinage to non-ferrous fittings on ships. Many domestic taps use brass where contact with water occurs. You are provided with a sample of brass which is about 150 years old and you are
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