Engineering Materials Vol II (microstructures processing design) 2nd ed - M Ashby D Jones (1999) WW Part 12 ppsx
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 12 ppsx
... more demanding struc-tural applications, have design methods evolved.In designing with ductile materials, a safety-factor approach is used. Metals can beused under static loads within a small ... pin of a pin-jointed frame, made ofmetal, fits poorly, then the metal deforms locally, and the pin beds down, redistribut-ing the load. But if the pin and frame are made of a brittle material, ... Morrell, Design with Non-Ductile Materials, AppliedScience Publishers, 1982. D. W. Richardson, Modern Ceramic Engineering, Marcel Dekker, 1982. (d) PolymersDuPont Design Handbooks, DuPont de Nemours...
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Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 3 ppsx
... metre of deformed metalis about 2 MJ, equiva-lent to 15 J mol−1. When cold worked metals are heated to about0.6T m , new strain-free grains nucleate and grow to consume all the cold-worked ... good example to begin with is solidification – most metals are melted or solidi ed during manufacture, and we have already looked at two case studies involving solidi-fication (zone refining, and ... Samples cut from a length of work-hardened mild steel bar were annealed forvarious times at three different temperatures. The samples were then cooled toroom temperature and tested for hardness....
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Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 8 ppsx
... dried and fired, one com-ponent in it melts and spreads round the other components, bonding them together.Low-grade ceramics – stone, and certain refractories – are simply mined and shaped.We are ... metal such as molybdenum (usually applied as a powder and then heated).200 Engineering Materials 2Fig. 19.9. Forming methods for glass: pressing, rolling, float-moulding and blow-moulding.rate ... indent the ceramic with a diamond and measure thehardness.This enormous hardness is exploited in grinding wheels which are made from smallparticles of a high-performance engineering ceramic...
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Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 9 ppsx
... necessitates adifferent design approach (Chapter 27).Most polymers are made from oil; the technology needed to make them from coal isstill poorly developed. But one should not assume that dependence ... this chapterwe examine three cement pastes: the primitive pozzolana; the widespread Portlandcement; and the newer, and somewhat discredited, high-alumina cement. And we con-sider the properties ... P(DP )d( DP) is the fraction of molecules with DP values between DP and DP + d( DP). The molecular weight is just mDP where m is the molecular weight of themonomer.Most polymer properties depend...
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Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 14 ppsx
... (a) Tin-rich solid plus lead-rich solid.(b) Liquid plus tin-rich solid.(c) Lead-rich solid only. (d) Liquid only.2.6 (a) Liquid plus lead-rich solid between 1 and 2.(b) Lead-rich solid between ... When the temperature or pressure is decreased very rapidly, high temperature orhigh pressure phases can be “trapped”, and are observed at atmospheric temper-ature and pressure (diamond, for instance, ... which limits the bottom of the liquidfield is called the liquidus line. The other boundary of thetwo-phase liquid–solid field is called the solidus line.The liquidus lines start from the melting...
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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 ... giveFig. 12. 7. Simpli ed phase diagram for the Fe–Cr–0.6% C system. 112 Engineering Materials 2various times before being quenched again. Hardness measurements taken fromthe re-quenched samples...
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