Average grain diameter at 310MPa from 2 known yield/grain values

  • Thread starter Thread starter physicsnnewbie
  • Start date Start date
  • Tags Tags
    Average Diameter
AI Thread Summary
The discussion focuses on determining the grain diameter at which the lower yield point of iron reaches 310MPa, given two known yield points at different grain diameters. The lower yield point is 230MPa at a grain diameter of 1e-2mm and increases to 275MPa at a grain diameter of 6e-3mm. Participants reference the Hall-Petch relationship, which relates grain size to yield strength, as a potential method for solving the problem. There is uncertainty among contributors about the appropriate equations to use for the calculation. The conversation emphasizes the need for clarity on the Hall-Petch equation to find the desired grain diameter.
physicsnnewbie
Messages
48
Reaction score
0

Homework Statement


The lower yield point for an iron that has an average grain diameter of 1e-2mm is 230MPa. At a grain diameter of 6e-3mm, the yield point increases to 275MPa. At what grain diameter will the lower yield point be 310MPa?


Homework Equations


Not sure


The Attempt at a Solution


Not sure how to do it.
 
Physics news on Phys.org
Look up "Hall-Petch."
 
Thanks Mapes
 

Similar threads

Solving for Hall Petch Unknowns
Replies
5
Views
28K
What Do C and M Represent in the Grain Diameter Formula?
Replies
2
Views
4K
Engineering Average heat transfer coefficient (forced convection)
Replies
6
Views
3K
Finding pulley diameter with speed in rpm
Replies
1
Views
3K
Calculating Rod Strength: Help with Oak Rod Homework Problem
Replies
5
Views
2K
Is it well analyzed? Doubt about a bar: tension/compresion
Replies
5
Views
2K
Fluid Mechanics:Volumetric flow rate and average velocity
Replies
11
Views
3K
Convert Units: q,C from gr/lb, gr/gal to mg/g, mg/dm^3
Replies
3
Views
2K
Yield Point: Why Can Material Elongate without Force?
Replies
8
Views
3K
Finding the average shear stress
Replies
2
Views
6K

Hot Threads

Recent Insights

Back
Top