Answer:
Explanation:
The diffusion coefficient is computed by using this Arrhenius-type Model:
The following is constructed by dividing to two distinct diffusion coefficients:
Any diffusion coefficient at a different temperature can be found by using this formula:
Since the world is a 3D space, approximately.
I think it is A I looked it up
Answer: Yes, there is advantage.
Explanation:
Step 1 of 3
For AISI 4340 Cr-Mo-Ni steel
The tensile strength(S) = 260kpsi.
Step 2
Endurance limit for (S') for 260kpsi is 100 kpsi
From table parameters for As-forged surface finish
a= 39. 9, b=-0. 995
Step 3
Find the surface factor by using
aS^b
S is tensile strength is 260kpsi.
Therefore
Surface factor =
39, 9(S)^-0.995 = 0.1578
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