Engineering Materials Vol II (microstructures processing design) 2nd ed - M Ashby D Jones (1999) Episode 7 doc
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...
Engineering Materials Vol II (microstructures processing design) 2nd ed. - M. Ashby_ D. Jones (1999) Episode 10 docx
... 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...
Engineering Materials Vol II (microstructures processing design) 2nd ed. - M. Ashby_ D. Jones (1999) Episode 2 potx
... 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...
Engineering Materials Vol II (microstructures processing design) 2nd ed. - M. Ashby_ D. Jones (1999) Episode 4 pps
... (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...
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 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...
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 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...
Engineering Materials Vol II (microstructures processing design) 2nd ed. - M. Ashby_ D. Jones (1999) Episode 8 ppt
... 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...
Engineering Materials Vol II (microstructures processing design) 2nd ed. - M. Ashby_ D. Jones (1999) Episode 9 potx
... 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...
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