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Engineering Materials Technology, 2nd Edition
book

Engineering Materials Technology, 2nd Edition

by William Bolton
October 2013
Intermediate to advanced content levelIntermediate to advanced
468 pages
20h 15m
English
Newnes
Content preview from Engineering Materials Technology, 2nd Edition
Structure
of alloys 51
As the alloy cools further, so the dendrites grow. At 1200°C the expected
composition of the solid material would be 62 per cent copper-38 per cent
nickel, the liquid having the composition 78 per cent copper-32 per cent
nickel. So the percentage of copper has increased from the 53 per cent at the
liquidus temperature, while the percentage of nickel has decreased. If the
dendrite is to have
a
constant composition, movement of atoms within the solid
will have to occur. The term
diffusion
is used for the migration of
atoms.
The
nickel atoms will have to move outwards from the initial dendrite core and
copper atoms will
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Publisher Resources

ISBN: 9781483141077