Question

can someone help me with this question about the modulus elasticity and a body centered cubic structure?

Answer 1

explain why the modulus of elasticity of single crystal BCC iron is much higher in the {111} directions as compared to that in the {100} directions.

Answer 2

sure.
1) draw bcc cube
2) add coordinate system
3) draw vectors
We can go from there...

Answer 3

I didn't fully understand this portion of the lecture when we covered it. From the notes this is what the BCC of iron looks like.ok so here's my answer to this and please correct me if, and i'm very much expecting to be, I'm wrong. So the modulus of elasticity of iron along the {111} plane has more atoms in the BCC along the way that it makes the modulus of elasticity stronger making the atoms want to hold on to each other a little longer. in the {100} direction there's a minimal amount of atoms in the path of the {100} direction and lesser modulus of elasticity.