cobalt based super alloy

Question 1

what is less complex chemically nickel or cobalt based

Answer 1

cobalt is less
➢ A typical cast cobalt based alloy might be eg.
➢ 50-60% Co;
➢ 20-30% Cr;
➢ 5-10% W;
➢ 0.1-1.0% C, + some NI, Ta, Fe, Nb.
less strength than nickel

Question 2

what is the main strengthing carbide in cobalt based alloys

Answer 2

M23 C6 is main whihc oins boundaires and stops dislocation movement when pricipitated within grain

Question 3

does cobalt based have higher or lower strength than nickel

Answer 3

Co have lower strength at intermediate temperatures due to the lack of
coherent ’ precipitation which, all the Ni superalloys have.
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