Data on the stress-strain values for case hardened material 1

[shailnjm2004]

Dear friends,
For analysis of any component, material has to be specified. Cosmos has a builtin library of the materials.
I understand that the youngs modulus changes as you increase the hardness when you practically use a component.

So does the values mentioned in the library confirm to unhardened material or hardened material.

Is there any standard data that reflects the stress strain values i the material is case hardened?

Thanks in advance.

 

[NickE]

"I understand that the youngs modulus changes as you increase the hardness when you practically use a component."

Nope, you're wrong. Heat Treatment, Cold Working, and minor chemistry changes DO NOT change the Modulus of elasticity of engineering alloys.

Why is in this thread:
thread330-87802

Read Down a few posts. Maui gave the best technical answers.

 

[shailnjm2004]

Dear NICKE,

Thanks for your input. The link did help me clear my doubt, however I will appreciate you reply on the beloe query.

Can I state that "while performing FEA on a component made of SAE 1006 when subjected to a dynamic load will react in only one defined way irrespective of the body being unhardened, through hardened or case hardened."

Also, thanks for your time.

 

[NickE]

Yes.

SAE1006 will not through harden, there isnt enough carbon or other alloying elements.

When case hardened the carbon(nitrogen) that is dissolved into the surface doesnt increase the modulus. The yield and tensile strengths increase.

So for example consider two simple cantilever beams loaded at one end in one plane, one of which is case hardened to a depth of .015" and has a surface hardness of ~40HRc, the other is identical in all dimensions but is not case hardened. When loaded (below yield) at the same location and same force, they will both show the same tip deflection. If the load is cycled or increased the un-cased beam will fatigue sooner, or show plastic deformation sooner.

 

[shailnjm2004]

Dear NICKE,

Thank you for your valuable suggetion.