Engineering Materials Vol II (microstructures processing design) 2nd ed - M Ashby D Jones (1999) Episode 7 doc

... sliding, and allowing the clay to be formed by 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 ... 17. 1 shows that Table 17. 1 Specific moduli: ceramics compared to metals Material Modulus E Density r Specific modulus E/ r (GPa) (Mg m − 3 ) (GPa/Mg m − 3 ) Steels 210 7. 8 27 Al alloys 70...

Ngày tải lên: 13/08/2014, 05:20

... 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 ... the Special topic: wood 277 Chapter 26 Special topic: wood Introduction Wood is the oldest and still most widely used of structural materials. Its documented use in buildings and ships spans more...

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... worked or heat-treated into finished 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...

Ngày tải lên: 13/08/2014, 05:20

... (wt%) s y (MPa) Slowly cooled Quenched and aged 2000 Al + 4 Cu + Mg, Si, Mn 130 465 6000 Al + 0.5 Mg 0.5 Si 85 210 70 00 Al + 6 Zn + Mg, Cu, Mn 300 570 Work hardening Commercially pure aluminium (1000 ... Publishers, 1 973 . D. A. Porter and K. E. Easterling, Phase Transformations in Metals and Alloys, 2nd edition, Chapman and Hall, 1992. M. C. Flemings, Solidification Processing, McGra...

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... wear and tear. Untempered martensite is far too brittle for hammer heads. Having solved the immediate problem to our satisfaction we still wondered how the manufacturer had managed to harden the ... bath of molten salt at 450°C. Finally, the heads are removed from the tempering bath and washed in cold water. The rather complicated austenitising treatment is needed be- cause the Standard insis...

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... then re-assembled and poured. When the casting has gone solid it is removed by destroying the mould. Metal moulds are machined from the solid. They Production, forming and joining of metals 143 Chapter ... 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 dissolved gases (either by addin...

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... fibre-reinforced polymers) and the formaldehyde-based plastics (widely used for moulding and hard surfacing). Other formaldehyde plastics, which now replace bakelite, are ureaformaldehyde (used for electrical ... 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 the monomer. Most polymer p...

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... top and normalised by T g along the bottom. (The normalisations make the diagrams more general: similar polymers should have similar normalised diagrams.) The diagram is divided, like the modulus ... allowing them to be formed by injection moulding, vacuum forming, blow moulding and compression moulding. Thermosets, on the other hand, are heated, formed and cured simultaneously, usually by c...

Ngày tải lên: 13/08/2014, 05:20