Engineering Materials Vol II (microstructures processing design) 2nd ed - M Ashby D Jones (1999) WW Part 11 pot
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 11 pot
... into board such as laminated plywood, chipboard and fibre-building board.Summary: wood compared to other materials The mechanical properties of wood (a structural material of first importance ... joined by cementing, by welding and by various sorts of fasteners, manythemselves moulded from polymers. Joining, of course, can sometimes be avoided byintegral design, in which coupled components ... finalmoulding. Similar agents can be blended into thermosets so that gas is released duringcuring, expanding the polymer into a foam; if it is contained in a closed mould it takesup the mould...
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Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 2 pot
... worked or heat-treated intofinished products; and by understanding these, shape and size can, to a large extent,be predicted.Background reading M. F. Ashby and D. R. H. Jones, Engineering Materials ... removed impurity from the left-hand end of the bar and dumped it at the right-hand end; that is, we have zone refined the left-hand part of the bar.Because we need to know how long the refined section ... repeatedly zone refined from left to right then more and more of the impurity will beswept to the right-hand end of the bar. A large number of zone-refining passes may be needed to make theleft-hand...
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Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 10 potx
... unnormalised across the top and normalised by Tg along the bottom. (Thenormalisations make the diagrams more general: similar polymers should have similarnormalised diagrams.)The diagram is divided, ... allowing them to be formed by injection moulding,vacuum forming, blow moulding and compression moulding. Thermosets, on the otherhand, are heated, formed and cured simultaneously, usually by compression ... the molecules increases the volume of the polymer. The extra volume(over and above that needed by tightly packed, motionless molecules) is called the free-volume. It is the free-volume, aided...
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Engineering Materials Vol II (microstructures processing design) 2nd ed. - M. Ashby_ D. Jones (1999) Episode 2 potx
... worked or heat-treated intofinished products; and by understanding these, shape and size can, to a large extent,be predicted.Background reading M. F. Ashby and D. R. H. Jones, Engineering Materials ... what moving the molten zone along the bar has done to it: wehave removed impurity from the left-hand end of the bar and dumped it at the right-hand end; that is, we have zone refined the left-hand ... 2nd edition, Butterworth-Heinemann,1996.Further reading D. A. Porter and K. E. Easterling, Phase Transformations in Metals and Alloys, 2nd edition, Chapmanand Hall, 1992.G. A. Chadwick, Metallography...
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Engineering Materials Vol II (microstructures processing design) 2nd ed. - M. Ashby_ D. Jones (1999) Episode 4 pps
... devel-oped for use in the aerospace industry, they are now much more widely used. Thedominant use of aluminium alloys is in building and construction: panels, roofs, andframes. The second-largest ... equilibrium temperature. If, instead of using undersaturatedammonium chloride solution, we pour saturated solution into the mould, we get whatis called “big-bang” nucleation. As the freshly poured ... transformation in iron: the volume of martensite produced is afunction of temperature only, and does not depend on time. Note that the temperature at which martensitestarts to form is labelled M s...
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Engineering Materials Vol II (microstructures processing design) 2nd ed. - M. Ashby_ D. Jones (1999) Episode 5 pps
... wear and tear. Untempered martensite is far too brittle for hammerheads.Having solved the immediate problem to our satisfaction we still wondered how themanufacturer had managed to harden the ... bath ofmolten salt at 450°C. Finally, the heads are removed from the tempering bath andwashed in cold water. The rather complicated austenitising treatment is needed be-cause the Standard insists ... the hammers to go above 723°C are theends: so only these parts can be hardened by the quench. The quenched heads are thendried and the ends are tempered by completely immersing the heads in...
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Engineering Materials Vol II (microstructures processing design) 2nd ed. - M. Ashby_ D. Jones (1999) Episode 6 pps
... then re-assembled and poured. When the casting has gone solid itis removed by destroying the mould. Metal moulds are machined from the solid. TheyProduction, forming and joining of metals 143Chapter ... of a shaped casting will directly determine the strength of the finished article.Gas pores should be avoided, so the liquid metal must be degassed to remove dissolvedgases (either by adding reactive ... operations should be carried out withminimum values of w/ d . (b) Small rolls give small w/ d values, but they may need to be supported byadditional secondary rolls.Well-designed rolling mills...
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Engineering Materials Vol II (microstructures processing design) 2nd ed. - M. Ashby_ D. Jones (1999) Episode 7 doc
... sliding, and allowing the clay to be formedby hand or with simple machinery. When the shaped clay is dried and fired, one com-ponent in it melts and spreads round the other components, bonding ... defect in the small volume subjected to the higheststresses is small.18.3 Modulus-of-rupture tests were done on samples of ceramic with dimensionsl = 100 mm, b = d = 10 mm. The median value of ... 1982. D. W. Richardson, Modern Ceramic Engineering, Marcel Dekker, 1982.Problems18.1 In order to test the strength of a ceramic, cylindrical specimens of length 25 mmand diameter 5 mm are...
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