
Creep 155
addition of elements to an alloy in order to make it precipitation hardened
increases its creep resistance.
4
Grain size
-
as
mentioned earlier in this chapter grain size can have an effect
on the creep behaviour of a material. At low temperatures fine grained
material has the best creep properties while at high temperatures coarse
grained material is best.
8.4 Factors affecting creep behaviour with plastics
While creep is significant mainly for metals at high temperatures, it can be
significant with plastics at normal temperatures. The creep behaviour of a
plastic depends on temperature and stress, just like metals. It also depend ...